St. Croix Sensory Nasal Ranger User manual

NASAL RANGER
®
FIELD OLFACTOMETER
OPERATIONS MANUAL U.S. Patent No.: 6,595,037
Version 7.1
®
St. Croix Sensory, Inc.
www.fivesenses.com
[email protected]m
1-651-439-0177

N
ASAL
R
ANGER

F
IELD
O
LFACTOMETER
O
PERATIONS
M
ANUAL V
7.1
©2020 St. Croix Sensory, Inc., All Rights Reserved.
Nasal Ranger
®
and the Nasal Ranger Logo are registered trademarks of St. Croix Sensory, Inc.
T
ABLE OF
C
ONTENTS
Safety and Maintenance ........................................................................................................... 1
Introduction to Field Olfactometry .......................................................................................... 2
What’s Included in Your Bag .................................................................................................. 3
Component Diagram ................................................................................................................ 4
Quick Start Guide .................................................................................................................... 5
Test Procedure Flow Chart ...................................................................................................... 6
Operating Principle .................................................................................................................. 7
Application Guide .................................................................................................................... 9
Nasal Mask: Instructions for Use and Maintenance ................................................................ 11
Odor Filter Cartridges: Instructions for Use and Maintenance ............................................... 13
Troubleshooting Guide ............................................................................................................ 15
Accessories ...............................................................................................................................16
Technical Specifications .......................................................................................................... 17
Sales Terms and Conditions .................................................................................................... 18
Odor Descriptor Examples ...................................................................................................... 20
Odor Monitoring Data Sheet ................................................................................................... 21
Registration Form .................................................................................................................... 22

Operations Manual v7.1
Nasal Ranger
®
Field Olfactometer -1- ©2020 St. Croix Sensory, Inc.
SAFETY AND MAINTENANCE
Safety Precautions
 Obtain proper permission to use the Nasal Ranger

Field Olfactometer at the desired locations and be
familiar with your surroundings before using the Nasal Ranger

Field Olfactometer.
 The Nasal Ranger

Field Olfactometer and its related products should not be used for anything other
than its intended purpose.
 The Nasal Ranger

Field Olfactometer is not to be used as a respirator for the reduction or elimination
of hazardous chemicals in the air.
 Do not use the Nasal Ranger

Field Olfactometer in atmospheres where contaminant concentrations
are unknown, immediately dangerous to life/health, or exceed applicable local standards.
 Do not use the Nasal Ranger

Field Olfactometer in atmospheres that contain less than 19.5% oxygen.
 The Nasal Ranger

Field Olfactometer should not be misused, altered, disassembled, or neglected.
 Use the Nasal Ranger

Field Olfactometer in a stationary position. Do not walk with the unit held up
to your nose. Remove the unit from your nose before moving to the next measurement location.
 The Nasal Mask is fragile and can break if dropped onto a hard surface. If the Nasal Mask is cracked
or broken, discontinue use, as usage of a broken mask could result in injury to the face. Discard the
broken mask and replace with a new one.
 Please refer to pages 7-8 Operating Principle of this manual for proper operating procedures.
Maintenance
 Odor Filter Cartridges should be replaced every 200 hours of field use, or if an odor is detected while
sniffing through a blank position. See page 13 Odor Filter Cartridges: Instructions for Use and
Maintenance for more information.
 The Nasal Mask should be cleaned with the provided isopropyl alcohol wipes as needed, such as when
a new operator uses it, or if an odor is detected on it. See pages 11-12 Nasal Mask: Instructions for Use
and Maintenance for more information.
 Comfort seals should be replaced when a new operator uses the mask, or if an odor is detected on
them.
 Mask O-rings should be replaced when any leaks occur between the Nasal Ranger

Field Olfactometer
and the Nasal Mask.
 The barrel of the Nasal Ranger

Field Olfactometer should be cleaned with the included barrel brush
when visible debris is present. To clean the barrel, take the mask off, turn the dial to the blank position,
lightly insert the brush into the barrel until it reaches the dial, and pull the brush out while giving a
slight twist.
 If a defect with the Nasal Ranger

Field Olfactometer should appear during the warranty period, please
refer to the Warranty Service Procedures section of page 18 Sales Terms and Conditions.
If you have any questions about proper usage or safety regarding the
Nasal Ranger

Field Olfactometer, please contact St. Croix Sensory, Inc. at
1-651-439-0177, or visit www.fivesenses.com/nasalranger.

Operations Manual v7.1
Nasal Ranger
®
Field Olfactometer -2- ©2020 St. Croix Sensory, Inc.
INTRODUCTION TO FIELD OLFACTOMETRY
Thank you for joining the ranks of Nasal Ranger

Field Olfactometer owners! This instrument allows one
to confidently measure and quantify odor strength in the ambient air with the state-of-the-art in field
olfactometry. A portable odor detecting and measuring device, The Nasal Ranger

Field Olfactometer
determines ambient odor dilution to threshold (D/T) values objectively. This instrument is precision
calibrated and will yield reliable odor strength results for your monitoring and measurement needs. The
Nasal Ranger

Field Olfactometer, as a nasal organoleptic instrument, provides field olfactometry using a
scientific method, resulting in dependable ambient odor quantification.
Be sure to register your Nasal Ranger

Field Olfactometer by completing the Registration Form (page 22)
and emailing, faxing, or mailing the form as instructed. Your registration will allow us to better serve you
with product updates and important information regarding your Nasal Ranger

Field Olfactometer. Note
that the serial number of your Nasal Ranger

Field Olfactometer can be found on the underside of the
battery compartment door.
Field olfactometry can be used as a proactive monitoring or enforcement tool for confident odor
measurement at property lines and in the neighboring community. Quantifying ambient odor is often
needed for the following purposes:
1. Monitoring daily operations (e.g. management performance evaluations)
2. Comparison of operating practices (e.g. evaluating alternatives)
3. Documenting specific events or episodes (e.g. defensible, credible evidence)
4. Monitoring compliance (e.g. compliance assurance for permits)
5. Determination of compliance (e.g. permit renewal)
6. Determination of status (e.g. baseline data for expansion planning)
7. Investigation of odor control effectiveness (e.g. scientific testing)
8. Verification of odor dispersion modeling (e.g. model calibration)
9. Determination of specific odor sources (e.g. investigation of complaints)
10. Verification of complaints (e.g. notice of violation)
In 1958, the U.S. Public Health Service sponsored the development of an instrument and procedure for
field olfactometry (ambient odor strength measurement) through Project Grants A-58-541, A-59-541, and
A-60-541. The Barnebey-Cheney Company originally manufactured a field olfactometer instrument based
on these grants, referring to it as a ‘scentometer’.
The Nasal Ranger

Field Olfactometer creates a calibrated series of discrete dilutions by mixing the
odorous ambient air with odor-free carbon filtered air. Field olfactometry defines each discrete dilution
level as a dilution to threshold (D/T) ratio. The dilution to threshold ratio is a measure of the number of
dilutions needed to make the odorous ambient air non-detectable.
Field olfactometry calculates the dilution to threshold (D/T) ratio as:
Volume of Carbon Filtered Air
D/T = ---------------------------------------
Volume of Odorous Air

Operations Manual v7.1
Nasal Ranger
®
Field Olfactometer -3- ©2020 St. Croix Sensory, Inc.
WHAT’S INCLUDED IN YOUR BAG
1. Nasal Ranger

Field Olfactometer with a Pair of Installed Type I Universal Odor Filter
Carbon Cartridges (NR0001)
2. 1 Wrapped Pair of Type I Universal Odor Carbon Cartridges (NR0081)
3. Barrel Cleaning Brush (NR0031)
4. 10 pack of Nasal Mask Comfort Seals (NR0062)
5. 10 pack of Isopropyl Alcohol Cleaning Wipes (NR0063)
6. Nasal Mask with Leak Test Stopper in Pouch (NR0046)
7. Carry Bag Strap (NR7021)
8. Phillips Head Screwdriver (NR0025)
9. 2 Spare Pairs of Nasal Mask O-Rings (NR0020)
10. Nasal Ranger

Field Olfactometer Strap (NR7020)
1
2
5
6
3
7
8
4
9
10

Operations Manual v7.1
Nasal Ranger
®
Field Olfactometer -4- ©2020 St. Croix Sensory, Inc.
COMPONENT DIAGRAM
Dilution to threshold
(D/T) Dial
Power &
Inhalation Rate
LED Display
Removable Nasal Mask
with Check Valves and
Comfort Seal
Replaceable
Carbon Filter Cartridges for
Odor-Free Dilution Air
9-Volt Battery
(Included)
Compartment in
Handle
Power
Button
Shoulder Strap
Connection
Serial Number
Located on
Underside of Battery
Compartment Door

Operations Manual v7.1
Nasal Ranger
®
Field Olfactometer -5- ©2020 St. Croix Sensory, Inc.
QUICK START GUIDE
Field olfactometry with the Nasal Ranger

Field
Olfactometer is a cost-effective means to quantify odor
strength. Facility operators, odor scientists, and community
inspectors can confidently monitor odor strength at specific
locations, such as an industrial facility’s property line, the
manufacturing area of a production building, and within
neighborhoods and public land.
The following information allows an informed user to
quickly understand the operation of the Nasal Ranger

Field
Olfactometer. It assumes the user has some familiarity with
field olfactometry and odor monitoring concepts. See pages
7-8 Operating Principle, and page 9 Application Guide, for
more information.
To Use the Nasal Ranger Field Olfactometer:
1. Turn the Nasal Ranger

Field Olfactometer on by pressing the power button located below the Nasal
Mask nozzle. All four LED lights should illuminate for one second, and then the 1
st
(leftmost) Power
LED will remain illuminated.
2. Follow the Test Procedure Flow Chart on the following page, holding the unit as shown in the picture
above.
3. Ensure your inhalation rate is within specification. The LED display on the Nasal Ranger

Field
Olfactometer provides feedback for the user to inhale at the factory calibration flow rate of 16-20 liters
per minute (LPM). The LEDs indicate the following:
1st 2nd 3rd 4th
Unit powered on Inhalation rate too low Proper inhalation rate
(16-20 LPM)
Inhalation rate too high
After 45 seconds of inactivity, the LEDs will turn off to conserve power. The 1
st
LED will periodically
blink during this time to indicate that the unit is still powered on. After 5 minutes of inactivity, the unit will
automatically power down fully. To turn the Nasal Ranger

Field Olfactometer off manually, press and
hold the power button for three seconds. All four LEDs will illuminate and then turn off. The Nasal
Ranger

Field Olfactometer is now powered down.

Operations Manual v7.1
Nasal Ranger
®
Field Olfactometer -6- ©2020 St. Croix Sensory, Inc.
TEST PROCEDURE FLOW CHART
S
TART
Turn the Nasal Ranger

Field Olfactometer on and position the D/T dial at
the first blank position located between 2-D/T and 60-D/T. Inhale at
your NORMAL breathing rate through the Nasal Mask for 1 minute.
Turn the dial to the 60-D/T position and inhale TWICE through the
Nasal Mask at the target inhalation rate of 16-20 LPM.
Turn the dial to the next blank position between 60-D/T and 30-D/T and
resume your NORMAL breathing rate through the Nasal Mask.
Turn the dial to the 30-D/T position and inhale TWICE through the Nasal
Mask at the target inhalation rate of 16-20 LPM.
Repeat the above steps with the 15, 7, 4, and 2 positions on the dial,
remembering to rest the nose with the blank positions between each D/T value.
After reaching the 2-D/T position:
Turn the dial to the next blank position between 30-D/T and 15-D/T and
resume your NORMAL breathing rate through the Nasal Mask.
Ask yourself:
Did I smell an odor?
Yes
No
Test concluded,
D/T > 60
Ask yourself:
Did I smell an odor?
Yes
Ask yourself:
Did I smell an odor?
Yes
Test concluded,
D/T < 2
No
No
Test concluded,
60 > D/T > 30
Test concluded,
4 > D/T > 2

Operations Manual v7.1
Nasal Ranger
®
Field Olfactometer -7- ©2020 St. Croix Sensory, Inc.
OPERATING PRINCIPLE
The Nasal Ranger

Field Olfactometer directly measures and quantifies odor strength in the ambient air
using the operating principle of mixing odorous ambient air with odor-free carbon filtered air in discrete
volume ratios. These discrete volume ratios are called dilution to threshold ratios (D/T ratios).
The user’s nose is placed firmly inside the Nasal Mask against the replaceable Comfort Seal. The user
inhales through the Nasal Mask at a comfortable breathing rate while standing at rest. The Nasal Mask has
an outlet for exhaled air to exhaust downward, allowing the user to inhale through the device and exhale
through the outlet check valve. Note that the user can stand at rest and continue normal breathing
exclusively through the Nasal Ranger

Field Olfactometer.
The power button, located directly below the Nasal Mask mounting point, is pushed once by the user to
turn the unit on. Holding the button for three seconds will turn the unit off. The unit will also automatically
power down after five minutes of inactivity.
A precision electronic flow meter is built into the Nasal Ranger

Field Olfactometer and measures the total
volume of airflow that is traveling down the PTFE barrel on the way to the user’s nose. A visual
representation of this is shown by the four LEDs recessed on top of the Nasal Ranger

Field Olfactometer
housing. This display indicates when a user is inhaling within the factory calibration flow rate of 16-20
liters per minute (LPM). The four LEDs specify the following:
1
st
LED (Leftmost): Indicates that the power is on when lit. After 45 seconds of inactivity, the
LED will turn off and periodically blink to conserve power. When airflow is detected, the LED
will wake from the power save mode and illuminate fully.
2
nd
LED: Indicates that the user is inhaling at a flow rate of less than 16 LPM when lit.
3
rd
LED: Indicates that the user is inhaling at a flow rate between 16 and 20 LPM when lit.
4
th
LED (Rightmost): Indicates that the user is inhaling at a flow rate of greater than 20 LPM
when lit.
To operate the Nasal Ranger

Field Olfactometer correctly, the user must inhale at a rate where only the
first and third LEDs are illuminated (16-20 LPM). This ensures that the rate of inhalation is equivalent to
the factory calibration flow rate.
The Nasal Ranger

Field Olfactometer’s operating principle of mixing odorous ambient air with odor-free
filtered air in discrete volume ratios is achieved using two airflow paths:
1. Flow through one of the six orifices in the D/T dial.
2. Flow through the odor filter cartridges.
The first airflow path is unaltered ambient air flowing through a small opening in the D/T dial. The second
airflow path takes an alternate route through the pair of odor filter cartridges that are attached to each side
of the Nasal Ranger

Field Olfactometer housing. The ambient air which travels through these odor filter
cartridges will contact the multimedia carbon inside and be rendered odorless. The two airflow paths then
combine into one and travel down the PTFE barrel to the user’s nose, which is pressed against the Comfort
Seal adhered to the Nasal Mask, creating an airtight seal around the user’s face and ensuring that the air
mixture from the Nasal Ranger

Field Olfactometer is not being diluted with additional ambient air.

Operations Manual v7.1
Nasal Ranger
®
Field Olfactometer -8- ©2020 St. Croix Sensory, Inc.
OPERATING PRINCIPLE
(C
ONTINUED
)
The rotational position of the Nasal Ranger

Field Olfactometer D/T dial determines the orifice size and,
therefore, the volume of odorous air that enters through the selected orifice. A large orifice allows more
odorous air through the D/T dial to mix with odor-free filtered air, and a small orifice allows less odorous
air through the D/T dial to mix with odor-free filtered air. The ratio of the volume of filtered odor-free air
and the volume ambient odorous air is called the dilution to threshold (D/T) ratio. The principle of field
olfactometry calculates this dilution to threshold ratio as:
Volume of Carbon Filtered Air
D/T = ---------------------------------------
Volume of Odorous Air
The D/T dial contains twelve orifice positions. Six are blank positions, so-called because they close off the
airflow path through the D/T dial and allow the user to inhale only odor-free filtered air. Alternating with
the six blank positions are the six D/T positions, each having a specific orifice side that allows for discrete
dilution to threshold ratios with traceable calibration.
The following table summarizes the twelve positions of the standard D/T dial equipped on the Nasal
Ranger

Field Olfactometer:
1 - Blank
2 - 60-D/T
3 - Blank
4 - 30-D/T
5 - Blank
6 - 15-D/T
7 - Blank
8 - 7-D/T
9 - Blank
10 - 4-D/T
11 - Blank
12 - 2-D/T
To indicate the starting position, there is a raised arrow is on the rim of the D/T dial, corresponding to the
first blank (Position 1). There are also six raised dots on the rim of the dial corresponding to each of the
D/T positions.
In addition to the standard dial that ships with the Nasal Ranger

Field Olfactometer, there are also
supplementary dials available. Please contact St. Croix Sensory, Inc. with inquiries regarding Nasal
Ranger

Field Olfactometer D/T dials with other dilution to threshold ratios.

Operations Manual v7.1
Nasal Ranger
®
Field Olfactometer -9- ©2020 St. Croix Sensory, Inc.
APPLICATION GUIDE FOR FIELD OLFACTOMETRY
Odor Monitoring
Field olfactometry with the Nasal Ranger

Field Olfactometer is a safe and effective means to quantify
odor strength in terms of dilution to threshold (D/T) ratios. Facility operators, city inspectors, and
neighborhood citizens can use this instrument to monitor ambient odor strength at specific locations within
and around a facility’s property line, as well as within the community.
The following example protocols are presented in brief form as possible applications in which the Nasal
Ranger

Field Olfactometer might be used.
On-Site Monitoring – Operators have the unique ability to monitor odors throughout the day with field
olfactometry. Operator monitoring can include odor observations of arriving materials, outdoor process
activities, and fugitive air emissions. On-site monitoring with a Nasal Ranger

Field Olfactometer may
include odor observations at predetermined locations, such as open doorways, loading zones, storage areas,
and fence lines.
Random Monitoring – A frequently used method for ambient odor monitoring is the inspection of one or
multiple areas at random times and intervals. Random monitoring leads to a compilation of data that can be
correlated with meteorological conditions and on-site operation activities.
Scheduled Monitoring – Scheduled monitoring can be as informal as a daily walk around the facility, or as
structured as multiple visits to predetermined monitoring locations within a specific timeframe. Data from a
Nasal Ranger

Field Olfactometer used in this way can be used to correlate the many parameters that
influence odor episodes, including meteorological conditions and on-site operation activities.
Intensive Odor Survey – An in-depth evaluation of on-site odor generation and off-site odor impact may be
needed for permit renewal or facility expansion. Data collection with the Nasal Ranger

Field Olfactometer
can identify which sources or operations cause odors and which ones do not. All potential odor sources and
operations could then be ranked, and their relative contributions determined. Short term trials or tests of odor
mitigation measures and odor counteractants would also require an intensive period of data collection using a
Nasal Ranger

Field Olfactometer.
Citizen Monitoring – The implementation of citizen odor monitoring with Nasal Ranger

Field
Olfactometers can be part of an interactive community outreach program. The primary function of citizen
odor monitoring could be to collect information, and alongside accurate record keeping, develop a model
which represents existing odor conditions within the community. Citizens recruited and trained to measure
odors using Nasal Ranger

Field Olfactometers could also report odor descriptors to be used in further data
analyzation. Citizen odor monitoring could assist in determining prevalent times and weather conditions of
odor episodes, as well as aid in understanding the strength at which an odor first becomes a nuisance.
Complaint Response – The use of ‘odor compliant hotlines’ is a common method used by facilities and
communities to respond to odor episodes. A Nasal Ranger

Field Olfactometer may be used by on-call
responders as part of a complaint response plan for verifying odor episodes, tracking odor sources, and
quantifying odor strength.
Plume Profiling – Atmospheric dispersion modeling predicts the transport and dilution of odors by the wind,
and using a protocol known as odor plume profiling, one could supplement atmospheric dispersion modeling
with actual odor measurements from the Nasal Ranger

Field Olfactometer. Several inspectors with Nasal
Ranger

Field Olfactometers, spaced crosswind and downwind from an odor source, could measure and
record their individual odor strengths as D/T values at set times, thereby creating an odor plume profile. This
profile would then be documented and overlaid on a local terrain map, allowing it to be correlated to an
atmospheric dispersion model, as well as the local topography.

Operations Manual v7.1
Nasal Ranger
®
Field Olfactometer -10- ©2020 St. Croix Sensory, Inc.
APPLICATION GUIDE FOR FIELD OLFACTOMETRY
(C
ONTINUED
)
Odor Regulations
The field olfactometer (also referred to as a scentometer) is referenced in a number of existing state odor
regulations, alongside dilution to threshold (D/T) terminology and the method for calculating D/T. The
exact wording in a regulation is important and often may be stated as either Compliance Criteria or
Nuisance Criteria.
Compliance Criteria: “…compliance if the ambient air is less than 7 D/T.”
Nuisance Criteria: “…nuisance if the ambient air is equal to or greater than 7 D/T.”
In these two examples, if an air pollution inspector observed an odor with a field olfactometer set at a 7
D/T, the odor would meet the criteria for nuisance and the ambient air would be noncompliant. Odor
regulations that utilize field olfactometry with a calibrated field olfactometer such as the Nasal Ranger

Field Olfactometer may also define the number of observations needed, as well as the time frame of the
observations. For example, a regulation may read:
“Two field olfactometer observations in a one-hour period separated by at least 15 minutes
each.”
Or
“Two field olfactometer observations not less than 15 minutes apart within a one-hour
period.”
Note that the example protocols in this Application Guide for Field Olfactometry are presented in brief
form and are not mutually exclusive, often being integrated into a comprehensive odor management
program with several different protocols included. In addition, though derived from actual odor regulations,
the example criteria for compliance and nuisance shown here are presented as examples only and are not
meant to represent or inform any current or future legislation.
If you have any questions, need additional information about the use and application of the Nasal Ranger

Field Olfactometer, or would like referral to industry or regulatory specialists, please contact St. Croix
Sensory, Inc. at 1-651-439-0177, or visit www.fivesenses.com/nasalranger.

Operations Manual v7.1
Nasal Ranger
®
Field Olfactometer -11- ©2020 St. Croix Sensory, Inc.
NASAL MASK:
INSTRUCTIONS FOR USE AND MAINTENANCE
The Nasal Ranger

Nasal Mask is specifically designed for use with the Nasal Ranger

Field Olfactometer.
It is made of a carbon fiber epoxy polymer with a polytetrafluoroethylene (also known as PTFE or Teflon)
coating. There are three openings in the Nasal Mask:
Nasal Port – Ergonomically designed to match the geometry of the human nose and face.
Inhalation Port – Opposite the nasal port, this port channels air into the mask from the Nasal
Ranger

Field Olfactometer.
Exhalation Port – Located at the bottom of the mask, this port allows air exhaled through the
nose to exit the mask.
Function of the Nasal Mask
A check valve is placed in both the inhalation and the
exhalation ports in order to control the direction of airflow
though the Nasal Mask while using the Nasal Ranger
®
Field
Olfactometer. These check valves permit air to move in only
one direction through the ports. When inhaling, only air that
has passed through the Nasal Ranger

Field Olfactometer
will enter the Nasal Mask, while ambient air will be
prevented from entering the mask. Inversely, when
exhaling, air will be ejected out the exhalation port and
away from the user, disallowing it to travel back through the
Nasal Ranger
®
Field Olfactometer.
Check valves are easily replaced if they become dirty or damaged. They are press fit into the ports and can
be removed by hand by applying pressure to the outer rim of the valve from inside the Nasal Mask. To
order additional check valve kits, contact St. Croix Sensory (see Accessories, page 16).
Nasal Mask Installation: To prevent kinking of the O-rings, rotate the Nasal Mask as you mount it to the
Nasal Ranger

Field Olfactometer nozzle. This will aid in ensuring the longevity of the O-rings.
Cleaning: St. Croix Sensory recommends cleaning the Nasal Mask using the included disposable isopropyl
alcohol wipes. To order additional wipes, contact St. Croix Sensory (see Accessories, page 16). Moist
towelettes and other wipes purchased in stores should be avoided, as they often contain a fragrance that
may leave a background odor on the Nasal Mask.
Care and Warnings: To ensure a long functional life of the Nasal Mask, adhere to the following warnings:
 The Nasal Mask is fragile. Do not drop on hard surfaces, as chipping and breakage could result.
 Do not attempt to clean in a dishwasher or autoclave, as these machines could damage the mask
 Do not expose to temperatures greater than 120°F, as these extremes could damage the mask.
Exhaled
Air
Inhaled
Air

Operations Manual v7.1
Nasal Ranger
®
Field Olfactometer -12- ©2020 St. Croix Sensory, Inc.
NASAL MASK:
INSTRUCTIONS FOR USE AND MAINTENANCE
(C
ONTINUED
)
The Comfort Seal
The Comfort Seal is a disposable accessory designed to improve comfort and ensure proper sealing of the
Nasal Mask during use of the Nasal Ranger

Field Olfactometer. Shaped to match the geometry of the
Nasal Mask, the Comfort Seal is made of a medical-grade foam that has seen extensive use in skin contact
applications.
Installation: The Comfort Seal has an adhesive on one side to adhere it to the Nasal Mask. To apply,
simply peel off the paper backing and press the Comfort Seal firmly to the mask rim. Due to the variability
of the shape of the nose between users, some may find better fitment by adjusting the positioning of the
Comfort Seal on the rim of the Nasal Mask. The picture below on the left shows two examples on how to
position the Comfort Seal.
Functional Verification: If applied and positioned correctly, the Comfort Seal should create an airtight
seal around the face. To check, insert the included stopper into the inhale port of the Nasal Mask and
attempt to breathe through the mask. If air leaks in around the Comfort Seal, try reapplying it with a
different positioning.
Safety and Replacement: The Comfort Seal is designed to be used by one person only. To ensure it is
odor free, the Comfort Seal should be cleaned with an isopropyl alcohol wipe at least daily and replaced at
least weekly. Remove and dispose of the Comfort Seal when it becomes dirty, odorous, or if another person
will be using the Nasal Mask. After removing the Comfort Seal, clean off the glue residue and wipe the
Nasal Mask with an isopropyl alcohol wipe before applying a new one.
For those with wider noses, the installation
on the left may be preferable, while people
with narrower noses may favor the
installation on the right.
When inhaling with the stopper in place,
the Nasal Mask should form a vacuum
seal around your nose.

Operations Manual v7.1
Nasal Ranger
®
Field Olfactometer -13- ©2020 St. Croix Sensory, Inc.
ODOR FILTER CARTRIDGES:
INSTRUCTIONS FOR USE AND MAINTENANCE
The Nasal Ranger

Field Olfactometer uses replaceable odor filter cartridges that contain a proprietary
blend of granular activated carbon multimedia which is designed to remove odors from the ambient air. The
unique design of these odor filter cartridges allows easy replacement in a convenient package. There are
four different carbon blends available, each suited to a particular environment.
Safety
The replaceable odor filter cartridges are only for use with the Nasal Ranger
®
Field Olfactometer
manufactured by St. Croix Sensory, Inc. Do not attempt to use them with any over device.
Do not use these cartridges under the following conditions or scenarios:
1. As respirator cartridges for the reduction or elimination of hazardous chemicals in the air.
2. In atmospheres where contaminant concentrations are unknown, immediately dangerous to life
and health, or exceed applicable local standards or U.S. Occupational Safety and Health
Administration (OSHA) standards.
3. In atmospheres that contain less than 19.5% oxygen.
Failure to adhere to these protocols could result in injury or death. Only use these odor filter
cartridges in the prescribed way with a Nasal Ranger
®
Field Olfactometer.
Replacement Instructions
St. Croix Sensory recommends replacing your odor filter cartridges after 200 hours of field use. If an odor
is detected through a blank position, the odor filter cartridges must be replaced. Both must be replaced at
the same time. They are mounted to the Nasal Ranger

Field Olfactometer using a standard threaded stud,
and no tools are necessary to replace them.
To replace the odor filter cartridges:
1. Lay the Nasal Ranger
®
Field Olfactometer on its side on a flat, stable surface.
2. Remove the used cartridges from the Nasal Ranger
®
Field Olfactometer by unscrewing them
counterclockwise. Dispose of the used cartridges.
3. Ensure the cartridge O-ring is correctly seated within its groove in the cartridge housing.
4. Remove a new cartridge from its packaging and place the threaded end onto the cartridge housing
stud. Turn the cartridge clockwise until snug against the O-ring. Tighten the cartridge hand-
tight only. Do not use any tools to tighten the cartridge.
5. Repeat for the other cartridge.
NOTE: If the cartridge does not spin freely, it may be cross threaded. Do not continue tighten it, as this
could result in air leaks and will potentially damage the cartridge. Unscrew it fully before attempting to
install it again.

Operations Manual v7.1
Nasal Ranger
®
Field Olfactometer -14- ©2020 St. Croix Sensory, Inc.
ODOR FILTER CARTRIDGES:
INSTRUCTIONS FOR USE AND MAINTENANCE
(C
ONTINUED
)
Cartridge Scheduling and Care
It is recommended to replace both cartridges in accordance with an established cartridge replacement
schedule. To ensure consistent results of the instrument, the user may decide to replace the cartridges:
 Before each use of the Nasal Ranger

Field Olfactometer
 After so many uses of the Nasal Ranger

Field Olfactometer
 After so many hours of use of the Nasal Ranger

Field Olfactometer
 Or after some other convenient timeframe
Leave the odor filter cartridges in their factory packaging before they are used. Once the cartridge packages
are opened, store them in a climate-controlled environment away from odors when not in use.
Note that some very strong odors may overpower the cartridges and will be detected through a blank
position. In this situation, contact St. Croix Sensory for assistance.
Do not alter, misuse, or abuse the odor filter cartridges.
If you have any questions about the use, application, or maintenance of the Odor Filter Cartridges, contact
St. Croix Sensory, Inc at 1-651-439-0177, or visit www.fivesenses.com/nasalranger.
Types of Cartridges
St. Croix Sensory manufactures four different types of odor filter cartridges, each suited to different odors
and scenarios. Using certain cartridge types may yield extended longevity of the odor filter. Contact St.
Croix Sensory for any questions regarding proper use of odor filter cartridge types.
Type I Type II Type III Type IV
Type I, Universal Odor – Suited for most
environments, this odor filter cartridge will be
useful to anyone using a Nasal Ranger

Field
Olfactometer.
Type III, Hydrogen Sulfide – Suited for
situations in which high amounts of H
2
S will be
present, such as wastewater treatment and oil
processing plants.
Type II, Organic Vapor – Suited for situations in
which high amounts of organic vapors will be
present, such as petroleum industrial plants and
agricultural complexes.
Type IV, Ammonia – Suited for situations in
which high amounts of NH
3
will be present, such
as livestock operations and manure processing.

Operations Manual v7.1
Nasal Ranger
®
Field Olfactometer -15- ©2020 St. Croix Sensory, Inc.
TROUBLESHOOTING GUIDE
Problem Possible Solutions
Unit doesn’t power
on or the LED
doesn’t light up.
 Press the power button several times to clean off any corrosion
on the electrical contacts.
 Ensure the battery is properly connected and is free from
corrosion.

Install a new battery.
Power only stays on
for a short time.
 Normal operation. The LED display will turn off after 45
seconds of inactivity, and the unit will fully power down after
5 minutes of inactivity. If the unit shuts down before this, it
may be low on power. Install a new battery.
When inhaling, flow
sensor LED display
responding erratically
or not responding at
all.
 Install a new battery.
 Ensure the Nasal Mask is properly sealing against the user’s
face. Try to reposition the mask or the Comfort Seal.
 Inspect the check valves to ensure they are properly positioned
inside the mask ports and are clean of any loose debris. If
damaged, check valves may need replacing.
An odor is detected
while the
D/T dial is set at a
blank position.
 Ensure the Nasal Mask is properly sealing against the user’s
face. Try to reposition the mask or the Comfort Seal.
 Inspect the check valves to ensure they are properly positioned
inside the mask ports and are clean of any loose debris. If
damaged, check valves may need replacing.
 Inspect the odor filter cartridges to ensure they are properly
seated in the housing. Be sure they are threaded into the
housing correctly and are snug against the O-rings (hand-tight
only).
 The odor filter cartridges may need replacing. See page 13 for
details.
 The ambient odor may be too strong or of a type that exceeds
the design of the odor filter cartridges. Contact St. Croix
Sensory for assistance.
The D/T dial does not
turn.
 Ensure the dial mounting screw is not too tight. If needed,
loosen with a 3/32 hex head screwdriver.
 Ensure there is nothing impeding the movement of the dial. If
needed, remove the dial to inspect and clean any debris
present.
The D/T dial does not
click into position or
spins freely.
 Ensure the dial mounting screw is not loose. If needed, tighten
with a 3/32 hex head screwdriver.
 Ensure there is nothing impeding the movement of the dial. If
needed, remove the dial to inspect and clean any debris
present.
If any problem is not resolved with these suggested solutions, contact St. Croix Sensory for
technical support at 1-651-439-0177, or send an email to [e-mail].

Operations Manual v7.1
Nasal Ranger
®
Field Olfactometer -16- ©2020 St. Croix Sensory, Inc.
ACCESSORIES
Part
Number Description
NR0009 9-Volt Battery
NR0011 Odor Sensitivity Test Kit
NR0020 O-Ring, Mask Connection (2 Pairs)
NR0021 O-Ring, Odor Filter Cartridge (1 Pair)
NR0043 Check Valve Kit (Parts for Inhalation and Exhalation Ports)
NR0046 Nasal Ranger Mask Package (Nasal Mask, Comfort Seal Package, and
one Access Code for the Nasal Ranger Online Training Course)
NR0054 High Dial Assembly (D/T Ratios 60, 100, 200, 300, 400, 500)
NR0062 Comfort Seal Package (10 Pack)
NR0063 Isopropyl Alcohol Cleaning Wipes Package (10 Pack)
NR0081 Type I Universal Odor Filter Cartridge (1 Pair)
NR0082 Type II Organic Vapor Odor Filter Cartridges (1 Pair)
NR0083 Type III Hydrogen Sulfide Odor Filter Cartridges (1 Pair)
NR0084 Type IV Ammonia Odor Filter Cartridge (1 Pair)
NR0091 Type I Universal Odor Filter Cartridge (6 Pairs)
NR0092 Type II Organic Vapor Odor Filter Cartridge (6 Pairs)
NR0093 Type III Hydrogen Sulfide Odor Filter Cartridge (6 Pairs)
NR0094 Type IV Ammonia Odor Filter Cartridge (6 Pairs)
For pricing and availability, including for accessories and parts not listed above,
contact St. Croix Sensory at 1-651-439-0177, or send an email to [e-mail].

Operations Manual v7.1
Nasal Ranger
®
Field Olfactometer -17- ©2020 St. Croix Sensory, Inc.
TECHNICAL SPECIFICATIONS
Detection Technique: Human Nose
Discrete Dilution Ratios
(Standard Dial, D/T): 2, 4, 7, 15, 30, 60
Response Time: As Fast as 3 Seconds (2 Inhalations)
Accuracy: +/- 10% of D/T Ratio
Repeatability: +/- 2%
Inhalation Rate: 16 - 20 Liters Per Minute
Operating Temperature Range: -10 to 160F
(-23 to 71C)
Power Requirements: 9-Volt Alkaline Battery
Nasal Ranger

Field Olfactometer
Dimensions:
14” x 7.5” x 4”
(35.5 cm x 19 cm x 10 cm)
Weight: 2.0 lbs
(0.91 kg)
Materials of Construction: PTFE and Polymer Alloys
Odor Filter Cartridge Dimensions: 3.5” Diameter x 1.5” Height
(8.9 cm x 3.8 cm)
Nasal Mask Dimensions: 2.75” x 2.75” x 2.25”
(7 cm x 7 cm x 5.7 cm)
U.S. Patent Number: 6,595,037
Calibration Verification: Recommended Annually
EMC Verification:
Emissions: EN 61326:1997, Class B
Immunity: EN 61326:1997, Industrial
Location
Markings: 89/336/EEC (EMC)
92/59/EEC (General Product Safety)

Operations Manual v7.1
Nasal Ranger
®
Field Olfactometer -18- ©2020 St. Croix Sensory, Inc.
SALES TERMS AND CONDITIONS
BY ST. CROIX SENSORY
Offer and Acceptance:
This document is an offer to enter into an agreement. For an effective
agreement
to be reached a duly authorized agent of Purchaser
must accept all of the terms and conditions set forth below, none of which can be altered or amended without St. Croix Sensory’s prior
written agreement.
Quotations and Prices:
The price stated on a St. Croix Sensory quotation form is firm for the initial order for a Nasal Ranger
®
Field Olfactometer or related
product only. Prices are subject to change without notice and orders calling for future delivery will be billed according to the price in
effect at the time of delivery. Oral quotations will not be honored by St. Croix Sensory and written quotations will automatically
expire sixty (60) calendar days from the date issued and are subject to earlier termination by written notice. All prices are FOB, St.
Croix Sensory’s manufacturing facility.
Payment Terms:
The net amount of each invoice is due in full with the order, by credit card payment or other method acceptable to St. Croix Sensory.
Taxes:
All present or future sales, use, revenue, excise or other taxes applicable to the Nasal Ranger
®
Field Olfactometer or related products
which are the subject of this Agreement shall be added to the purchase price and shall be paid by Purchaser, unless Purchaser provides
St. Croix Sensory with a tax exemption certificate acceptable to the relevant taxing authorities.
Shipment:
Both the method and the route of shipment are at the discretion of St. Croix Sensory, unless Purchaser supplies explicit instructions to
the contrary. All insured shipments will be made at Purchaser’s expense. Identification of the particular Nasal Ranger
®
Field
Olfactometer or related products to this agreement and the risk of loss will pass to Purchaser at the time of delivery to the carrier.
Governing Law and Venue:
This agreement shall be governed by and construed under and in accordance with the laws of the State of Minnesota, United States of
America (without regard to conflicts of laws principles). The venue of any legal action arising out of this agreement shall be the
Federal or State Courts located in Hennepin or Ramsey County in Minnesota, U.S.A., and the parties consent to the jurisdiction of
these courts.
Nasal Ranger
®
Field Olfactometer Limited Warranty:
St. Croix Sensory warrants to Purchaser that in normal and contemplated use and service, the Nasal Ranger
®
Field Olfactometer
purchased from St. Croix Sensory will be free from defects in material or workmanship for a period ending 365 days from the date of
original shipment by St. Croix Sensory. Subject to the conditions and exclusions contained in this document, St. Croix Sensory will, at
its option, either repair or replace any defective Nasal Ranger
®
Field Olfactometer or part thereof or refund the purchase price of the
defective Nasal Ranger
®
Field Olfactometer. Parts, devices or equipment that are supplied by vendors other than St. Croix Sensory,
shall carry only the applicable warranties and limitations provided by the relevant vendor. Expendable and/or consumable items or
parts included or used in connection with the Nasal Ranger
®
Field Olfactometer are not covered under this limited warranty. This
limited warranty does not cover a Nasal Ranger
®
Field Olfactometer that has been misused, altered, disassembled, neglected, handled
carelessly, or used for purposes other than its intended purpose. This limited warranty also does not cover loss or damage resulting
from any casualty loss or from unauthorized use or service. Under no circumstances shall St. Croix Sensory be liable for consequential
or other damages, losses, or expenses in connection with or by reason of the use or inability to use the Nasal Ranger
®
Field
Olfactometer for any purpose. WARNING: Unscrewing and disassembling the Nasal Ranger
®
Field Olfactometer housing will break
and alter the pressure seal of the instrument (6 screws visible on the left-side housing and 2 under the battery door). Doing so will void
the limited warranty and require the instrument to be shipped back to St. Croix Sensory to be re-sealed and re-calibrated at Purchaser’s
expense.
Warranty Service Procedures:
If a defect should appear during the warranty period, Purchaser should return the defective Nasal Ranger
®
Field Olfactometer, freight
and insurance prepaid, if possible in the original shipping container, to such address as shall be specified from time to time by St.
Croix Sensory. The appropriate warranty service address may be determined by calling 1-800-879-9231 or 1-651-439-0177 or by
consulting www.fivesenses.com. Any returned Nasal Ranger
®
Field Olfactometer must be accompanied by a written statement
including: the name of Purchaser; a description of the problem(s); and the action desired. St. Croix Sensory shall not be responsible
for any loss or damage incurred in shipping. Any warranty work to be performed by St. Croix Sensory shall be subject to St. Croix
Sensory’s confirmation that the returned Nasal Ranger
®
Field Olfactometer meets St. Croix Sensory’s warranty requirements. If a
defect is covered by this limited warranty, the repaired or replaced Nasal Ranger
®
Field Olfactometer will be returned to Purchaser at
St. Croix Sensory’s cost. Following a warranty repair or replacement, this limited warranty shall continue in effect until the end of the
original warranty period or for sixty (60) days after the repair or replacement, whichever is later.