KWJ KWJ-WSN CO User manual
KWJ-WSN CO
Wireless Carbon Monoxide Sensor
Technical Overview
Power Options
Sensors are powered by a replaceable 3.0 V coin cell bat-
tery. Optional AA battery powered sensors are available.
The AA version of these sensors are larger in size (3” [L] x
2.1” [W] x 1.2” [H] ) and include two long-life AA batteries.
It is recommended that unless you are using the AA
battery solution, you set heartbeat to no faster than one
hour to preserve battery life.
KWJ-WSN Sensors
Core Specications
• Power: Replaceable 3.0 V coin cell battery
• Communication: RF 900, 868 and 433 MHz
• Dimensions: 1.775” x 1.040” x 0.785”
• Antenna: 4” wire antenna
• Operating Temperature: -7° to 60°C (20° to 140°F)
• Device Range: 250 - 300 ft. non-line-of-sight*
• Battery Life: At 1 hour heartbeat setting, coin cell
battery will last ~ 10 months.**
* Actual range may vary depending on environment.
** Battery life is determined by sensor reporting
frequency and other variables.
1.775 in
(45.085 mm)
1.040 in
(26.416 mm)
Height: 0.785 in
(19.939 mm)
General Description
KWJ’s WSN CO detects ambient Carbon Monoxide levels
from 0 - 1,000 ppm in ambient air and transmits the data
wirelessly to the KWJ-WSN Dashboard. KWJ-WSN CO
delivers low level health monitoring not provided by other
off the shelf CO detectors.
Features
• Measures CO up to 1,000 ppm.
• High Accuracy (± 5%)
• Advanced Printed Electrochemical Sensor
Technology
• Long Life/Low Power Battery Operation
• Free KWJ-WSN basic online wireless sensor moni-
toring and notication system to congure sensors,
view data and set alerts via SMS text and email.
Principle of Operation
Electrochemical CO, Ambient Diffusion
15 minutes after the battery is installed, the sensor will
accurately measure the ambient CO level and send data
to the KWJ-WSN Online Sensor Monitoring and Noti-
cation System. The data is stored in the online system
and can be reviewed and exported. Notications can be
set up through the online system to alert the user when
thresholds have been met or exceeded.
The KWJ-WSN CO is pre-congured with the following
alert thresholds to provide essential data on low levels
of CO and to protect you from immediately dangerous
conditions:
• CO exceeding 50 ppm
• CO exceeding 125 ppm
• CO exceeding 400 ppm
• TWA (time weighted average) CO > 50 ppm
There are also several pre-congured thresholds that are
user changeable to allow further customization of your
alerts so you can receive notication about lower levels
of CO.
Applications
• Apartment/condominium/high-rise buildings
• Hospitals
• Malls/Retail centers
• Schools/Day Care facilities
• Business parks
• And many more...
Wireless Sensor
CARBON
MONOXIDE
CO
*Hardware can not withstand negative voltage. Please take care when connecting a power device.
** At temperatures above 100°C, it is possible for the board circuitry to lose programmed memory.
***
****
If application exceeds 1000 ppm the sensor will return a maximum reading of 1000 ppm.
At ambient conditions (25 ºC, 50% RH)
KWJ WSN, SPEC are trademarks of KWJ Engineering Inc.
©2014 KWJ Engineering Inc. All Rights Reserved.
KWJ Engineering Inc
8430 Central Ave.
Suite C
Newark, CA 94560
510-794-4296
www.kwjengineering.com
For more information about our products or to place an order, please
contact our sales department at 1-800-472-6626.
Visit us on the web at www.kwjengineering.com.
Technical Specications
Supply Voltage 2.0 - 3.6 VDC *
Current Consumption 0.7 µA (sleep mode)
2 mA (radio idle/off mode)
2 mA (measurement mode)
25 mA (radio RX mode)
35 mA (radio TX mode)
Operating Temperature Range (Board Circuitry and Coin Cell) -7°C to +60°C ( 20°F to +140°F )**
Optimal Battery Temperature Range (Coin Cell) +10°C to +50°C ( +50°F to +122°F )
Optimal CO Sensor Temperature Range -10°C to +40°C
Optimal CO Sensor Humidity Range 5% to 95% RH
Operating Range 0 - 1,000 ppm ***
Accuracy ± 5% ****
Certications Industry
Canada
900 MHz product; FCC ID: ZTL- RFSC1 and IC:
9794A-RFSC1. 868 and 433 MHz product tested
and found to comply with: CISPR 22:2008-09 / EN
55022:2010 - Class B and ETSI EN 300 220-2 V2.4.1
(2012-05).
Caution/Notice:
The KWJ-WSN CO will deliver essential information about low level and immediately dangerous levels of CO via the
KWJ-WSN Dashboard, text message and email alerts. PLEASE NOTE THE KWJ-WSN CO DOES NOT INCLUDE AN
AUDIBLE ALARM. WE RECOMMEND YOU INSTALL A KWJ AUDIBLE ALARM (SOLD SEPARATELY) OR A SUPPLE-
MENTAL UL RECOGNIZED CO ALARM TO AUDIBLY ALERT YOU TO DANGEROUS CONCENTRATIONS OF CO.
This product is designed for application in an ordinary environment (normal room temperature, humidity and atmospheric
pressure). Use of the sensor under the following conditions can deteriorate the product characteristics and cause prema-
ture failures and burn-out.
• Corrosive gas or deoxidizing gas - chlorine gas, hydrogen sulde gas, ammonia gas, sulfuric acid gas, nitric oxides
gas, etc.). For gas sensing in harsh environments, please inquire about the KWJ-WSN CO Industrial package.
• Volatile or ammable gas.
• Dusty conditions.
• Under extreme low or high pressure.
• Wet/excessively humid locations, or excessivley dry locations.
• Places with salt water, oils, chemical liquids, or organic solvents.
• Where there are excessively strong vibrations.
• Other places where similar hazardous conditions exist.
Use this product within the specied temperature range. Higher temperature
may cause deterioration of the characteristics or the material quality of
this product.
KWJ-WSN CO
Wireless Carbon Monoxide Sensor
Additional Notes of Operation
Sensor Mounting and Installation Tips
• It is recommended to install sensors in a conspicu-
ous location to facilitate airow around the sensor.
• Installing sensors near an opening where CO may
be regularly present (garage door, etc.) may cause
readings to periodically spike, and may affect TWA
calculations.
• It is recommended for maximum immediate CO
protection, that the user install a UL approved
commercially available carbon monoxide de-
tector with an audible alarm, or a KWJ Alarm
Module, to work alongside the KWJ-WSN CO
modules.
Setup Considerations
It is recommended that the user install no more than 15
sensor modules per gateway due to wireless bandwidth
limitations if all sensors alarm in response to 400 ppm
simultaneously.
Default Notication Settings
• OSHA (Industrial) setting includes thresholds for 50,
125, and 400 ppm as well as 50 ppm 8-hour TWA.
• Health Level setting includes the OSHA thresholds
as well as TWA thresholds of 9, 13, 16, 25, and 35
ppm.
• NOTE: Be aware that some user-dened thresholds
may conict with the default settings. In the case of
a conict, the default notication will be applied.
Default Notication Levels
OSHA & Safety Notication Setting
Title Notify When
(all day)
Transmit
Interval
Fixed or User
Chageable
CO Exceeds 50 ppm CO > 50 ppm 10 min Fixed
CO Exceeds 125 ppm CO > 125 ppm 1 min Fixed
CO Exceeds 400 ppm CO > 400 ppm 15 sec Fixed
TWA CO Exceeds 50 ppm TWA CO > 50 ppm 10 min Fixed
Health-Level Notication Settings (Low-Level Warnings)
Title Notify When
(all day)
Transmit
Interval
Fixed or User
Chageable
CO Exceeds 25 ppm CO > 25 ppm 10 min Changeable
TWA CO Exceeds 9 ppm TWA CO > 9 ppm 10 min Changeable
TWA CO Exceeds 13 ppm TWA CO > 13 ppm 10 min Changeable
TWA CO Exceeds 16 ppm TWA CO > 16 ppm 10 min Changeable
TWA CO Exceeds 25 ppm TWA CO > 25 ppm 10 min Changeable
TWA CO Exceeds 35 ppm TWA CO > 35 ppm 10 min Changeable
Wireless Sensor
CARBON
MONOXIDE
CO
CO Safety
While your KWJ-WSN CO sensor is an excellent mea-
sure of protection from CO exposure, it is also recom-
mended that you keep the following in mind if you are
ever away from your dashboard or the device receiving
notications:
The initial symptoms of CO poisoning are similar
to the u (but without the fever). They include:
* Headache
* Fatigue
* Shortness of breath
* Nausea
* Dizziness
If you suspect that you are experiencing CO poison-
ing, leave the area and get fresh air immediately.You
could lose consciousness and die if you stay in the
affected area. Get medical attention immediately and
inform medical staff that CO poisoning is suspected.
Call the Fire Department to determine when it is safe
to reenter the area.
LIMITED WARRANTY
KWJ Engineering warrants to the original purchaser that this product shall be free from any
defect in the materials or workmanship for 1 year from the date of purchase (excluding the
battery). This warranty does not cover wear and tear due to normal use. It does not apply to any
product that has been subjected to misuse, abuse, neglect, accident, tampering or unauthorized
repairs, failure to follow the instructions in the manual, or use under conditions outside those
recommended in the data sheet. KWJ Engineering may elect to replace the unit, at no extra
cost, with the same or a similar unit rather than repair it. In the event of replacement with a new
or reconditioned instrument, the replacement unit will continue the warranty of the original unit.
If the product should become defective during the warranty period, please return it through your
to receive return instructions and a Return Materials Authorization (RMA) number.
Except as provided herein, KWJ Engineering makes no warranties, express or implied, including
warranties of merchantability and tness for a particular purpose. KWJ Engineering shall not be
liable for loss of use of this instrument or other incidental or consequential damages, expenses
or economic loss, or claims for such damage or economic loss.
KWJ WSN, SPEC are trademarks of KWJ Engineering Inc.
©2014 KWJ Engineering Inc. All Rights Reserved.
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