Puro Violet Defense SENTRY M1 User manual

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User Manual
Sentry M1 and M2-T
Fixtures
with Single or Dual
UV Light Engines
Portable UV Protection
Powered by Violet DefenseTM technology

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PURO SENTRY M1 AND M2T USER MANUAL 2 of 8
Safety Warnings
WARNING: TO REDUCE THE RISK OF FIRE OR
ELECTRIC SHOCK, DO NOT EXPOSE THIS UNIT TO
RAIN OR MOISTURE.
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT
REMOVE COVER. NO USER-SEVICEABLE PARTS INSIDE. REFER
SERVICING TO QUALIFIED SERVICE PERSONNEL.
The lightning flash with arrowhead symbol, within
an equilateral triangle is intended to alert the
user to the presence of uninsulated “dangerous
voltage” within the product’s enclosure that may
be of sufficient magnitude to constitute a risk of
electric shock to persons.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant
to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference
when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful
interference in which case the user will be required to correct the interference at his own expense.
Important Safety Notes
Read these instructions prior to operating the fixture. Keep and follow all instructions.
• Heed all warnings. Failure to use the equipment in the manner specified may impair the fixture from
providing the desired protection.
• Plug unit into a grounded outlet. Ensure proper conditions for operation. The unit is designed to
operate under normal conditions indoors (temperature 5-40 degrees Celsius, RH less than 80%
(non-condensing), at an altitude <2000m and main supply fluctuations +/- 10% of nominal voltage,
over voltage Category II.
• Allow unit to complete pre-programmed cycles prior to unplugging or shutting off power. This
allows it to enter safe mode.
• Do not allow the unit to get wet or use in or near water.
• Do not block any ventilation openings. Use in accordance with these instructions.
• Do not attempt to open or tamper with the unit.
• Do not place or store the unit near any flammable materials or liquids.
• Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two
blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If
the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete
outlet.
• Protect the power cord from being walked on or pinched particularly at plugs, convenience
receptacles, and the point where they exit from the unit.
• Unplug this unit during lightning storms or when unused for long periods of time.
• Refer all servicing to the manufacturer if there is any damage to the unit or it is not operating
correctly.
• The fixture is designed to operate only when the room is unoccupied. There are redundant
safety systems to ensure the unit does not activate while the room is occupied as the UV light is not
recommended for excessive exposure. If the sensor in the system fails, the system will shut down.
• Do not look directly at the unit due to the brightness of the light. UV light does not significantly
penetrate standard glass, therefore, incidental exposure on the other side of a window or wall does
not present any significant risk.
• KEEP AWAY FROM CHILDREN

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PURO SENTRY M1 AND M2T USER MANUAL 3 of 8
UV Safety Overview
Given the correct combination of user protocols and the built-in safety features of the unit, there are
minimal risks of any harmful effects from using the unit.
Recommendations
• If in the vicinity of the Sentry M1 or M2-T units during operation, do not look directly at the light. This is
similar to how one would avoid harmful effects from the sun by not looking directly at it.
• UV light does not significantly penetrate standard glass. It is safe to be behind a window or wall while
the unit is operational.
• Per the built-in safety features described below, the unit is designed to not operate while a room is
occupied. However, operators are instructed in the user manual to have all persons vacate a space
before operation. Further optional protocols, such as signage indicating the UV unit is in operation may
be desired.
Safety Features
The Sentry M1 and M2-T have four primary aspects to their built-in safety features to ensure the safety of
anyone operating or in the vicinity of a unit.
Limited Exposure Risk
Due to the nature of the programming on the Sentry unit, over a 30-minute cycle time for the fixture, the
actual exposure to UV (if there were no other safety systems in place) would be no more than two seconds
of exposure – well below the recommended standards. Furthermore, this is approximately 1800x less time
exposure than would occur from the sun if outdoors for 30 minutes.
Redundant Safety Systems
Each Sentry unit has a built-in passive infrared (PIR) sensor used to detect motion in a space. The sensor is
programmed to detect individuals walking into the deployment space. The unit will not resume operation
of the cleaning cycle until it has successfully detected the space is free of motion.
Safe Stop
The third layer of protection built into the Sentry unit is to ensure that if the motion sensor or other
components experience technical issues, the unit will safe stop by cycling the unit off. The unit will flash red
indicating that one should contact PURO Lighting for technical support. The unit will not resume operation
until the issue detected has been resolved. If unit is non-responsive (i.e. non-operational or no indicator
light), contact PURO Lighting for technical support.
Frequency of Flashes
The Sentry unit will flash every 6 seconds during operation. Violet Defense, PURO Lighting’s
technology partner, collaborated with the Epilepsy Foundation when designing the product to ensure
that the frequency of flashes will not cause any issues for someone with photosensitive epilepsy.
Disclaimer: The Sentry unit is not intended for use as a medical device and people should not be
directly exposed to the light generated by the unit. The actual disinfection rates on a specific space will vary.

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PURO SENTRY M1 AND M2T USER MANUAL 4 of 8
Governmental Guidelines for UV Light Safety
Occupational Safety and Health Administration (OSHA)
The Occupational Safety and Health Administration (OSHA) does not have any mandated exposure
limits to ultraviolet light. OSHA only provides technical guidance regarding protecting employees from
ultraviolet laser exposure. While general information about ultraviolet contained in that guidance is
described below, it is important to note that PURO Lighting does not currently deploy ultraviolet lasers.
For more information on OSHA’s guidelines, visit:
https://www.osha.gov/laws-regs/standardinterpretations/2003-02-26.
Ultraviolet radiation is divided into three regions: UV-A: 315-400 nanometers (nm), UV-B: 280-315 nm, and
UV-C: 200-280 nm. UV can be associated with adverse health effects due to prolonged exposure and the
wavelength of light.
According to OSHA’s guidelines, “exposure in the shorter UV-C and longer UV-A ranges seems less harmful
to human skin. The shorter wavelengths are absorbed in the outer dead layers of the epidermis and the
longer wavelengths have an initial pigment-darkening effect followed by erythema if there is exposure to
excessive levels.”
“The hazards associated with skin exposure are of less importance than eye hazards.” Exposure to light may
cause photokeratitis or cataracts.
National Institute for Occupational Safety and Health (NIOSH)
The National Institute for Occupational Safety and Health (NIOSH) recommends limits to exposure
determined by the wavelength of UV light and intensity. NIOSH recommends that the time of exposure
to an intensity of 100 microwatts per square centimeter at wavelength 254 nm not exceed 1 minute. Per
the programming, UV exposure from Sentry units for a 30-minute cycle is less than two seconds. For more
information, view the recommended standards from NIOSH at:
https://www.cdc.gov/niosh/docs/73-11009/pdf/73-11009A.pdf.
Environmental Protection Agency (EPA)
The Environmental Protection Agency (EPA) is the governmental agency responsible for regulating
ultraviolet light products. It regulates chemical disinfectants along with devices, such as
equipment that generates UV light, used to control pests like bacteria and making antimicrobial claims.
The manufacturer of PURO Lighting products is an EPA-registered company (Facility No. 92142) and is
in full compliance with all regulations. For more information about EPA guidelines, visit:
https://www.epa.gov/safepestcontrol/pesticide-devices-guide-consumers.
Food and Drug Administration (FDA)
The Food and Drug Administration (FDA) only regulates devices that are classified as medical
instruments, machines, and devices used to treat diagnosed medical conditions. Therefore, PURO
Lighting does not fall under FDA guidelines. Furthermore, PURO Lighting products do use materials
approved by the FDA for use in food and medical applications.

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PURO SENTRY M1 AND M2T USER MANUAL 5 of 8
Operation of Unit
1. Position the unit in the targeted cleaning area.
• It is recommended that you place the unit approximately 2 meters (~6 1/2 feet) or less away from
the priority areas. Note that the unit can effectively kill pathogens up to 4 meters (~13 feet) away,
but the length of time necessary to run the unit increases proportionately to the distance from
targeted area.
• Leverage reflective surfaces in your space, including standard glass, as the UV light will reflect off
of these surfaces increasing their germ-killing effects. However, surfaces such as paint will absorb
the photons, minimizing effects of the unit, so avoid placing the unit too close to walls in your area.
2. Adjust the height of the unit to optimize effects of the unit, minimizing any shadowed areas (unit can
only kill germs where the light touches, either directly or by reflection). See page 6 for how to adjust
height of unit.
3. Plug in the unit, which runs at 120V AC and 60 Hz. Once powered on, at its peak, the unit will draw up to
7 amps (less than a standard vacuum cleaner) for 4 second intervals. Ensure the breaker has available
amp draw during operation.
4. While the unit is operational, all personnel should leave the room during the cleaning cycle. Exit the room
within 60 seconds for optimal functioning of the unit. The unit is programmed to operate for 30 minutes
per cycle. The unit’s redundant safety systems will stop the unit from operating if motion is detected in
the space. The unit will resume operation approximately 60 seconds after room is unoccupied and no
additional motion is detected.
5. The unit will run a safety test to ensure unit is functioning properly and that there is no motion detected
in the space. If successful, unit will run its pre-programmed operational cycle as described in step 4.
6. Allow the unit to complete its entire cycle before unplugging the unit. This allows the unit to enter safe
mode. If necessary to unplug the unit prior to completion of cleaning cycle, be sure to keep unit away
from water for optimal safety.
7. Once the cycle is complete reposition the unit within the space, as necessary, to account for any
shadowing that would have occured during the first cycle.
*It is recommended that after every 30-minute run that you allow the unit to cool down for a 15-minute
period of time, in order to maximize the life expectancy of your PURO Lighting Sentry M1 or M2-T product.
Built-in motion sensor will actively
monitor the space and only allow the
unit to activate when the space is
unoccupied.
The height of each whole room unit
may be repositioned to optimize the
disinfecting of your space.
Sentry M1 or M2-T Units - Use Pulsed
Xenon technology to deploy powerful
bursts of UV-C, UV-B, UV-A, and violet-
blue light with 170 of coverage for the
Sentry M1-1 and M2-T units and 340
for the Sentry M1-2 unit.

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PURO SENTRY M1 AND M2T USER MANUAL 6 of 8
SETTING UP TRIPOD STAND
ADJUSTING HEIGHT OF VERTICAL POLE ON STAND
SECURING UNITS TO STAND
1. Position the stand in the target
area. Rotate knob counterclockwise
to loosen.
2. Pull on legs to spread apart to
desired position.
3. Rotate knob clockwise to tighten.
1. Rotate upper knob
counterclockwise to loosen.
2. Raise the vertical pole to desired
height.
3. Rotate knob clockwise to tighten.
4. Insert security key into slot
(optional).
1. Align bracket on back of units with
bracket on stand. Slide down until
fully seated.
2. Insert screw and tighten to lock
unit onto stand.
3. The mounting bracket swivels
enabling unit to be positioned
vertically or horizontally by turning
unit to desired direction.

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PURO SENTRY M1 AND M2T USER MANUAL 7 of 8
Guidelines for Cleaning the Fixture
• To clean the unit, wipe down the metal plates with stainless steel polish using a microfiber cloth.
• Do not use abrasive cleaners to clean the unit.
For most situations, the instructions above can be used to clean the unit. However, there are special
instructions recommended for blood spills, or when certain organisms, such as C. diff are known or
suspected to be present.
GENERAL DISINFECTION GUIDELINES
1. Complete standard cleaning procedures to remove any visible dirt, grease, or other debris from space.
2. Activate unit per operational instructions above.
3. Upon returning to space, look at indicator light. Solid green light indicates cleaning cycle completed. If
motion was detected prior to observing the indicator light, the indicator light will turn red. If users want
to determine if the unit completed the last cycle, prior to powering off, stand out of range of the motion
sensor for 60 seconds. The light will resume solid green if cycle was completed. Otherwise, it will resume
operation.
Cleaning when Blood or Bodily Fluids are Present
UV light has the ability to penetrate liquid blood, which has not formed a dried crust, or bodily fluids up to a
1/16” thickness as long as there is no tissue or solid material present. Therefore, UV light may be used to help
protect staff before and after traditional cleaning protocols for your facility.
1. Activate the fixture prior to commencing any cleaning procedures. If the blood has already dried, apply
hydrogen peroxide solution prior to running the unit.
2. Utilize normal procedures, including appropriate safety protocols to clean the space, including removal
of blood and bodily fluids.
3. Activate a second cycle of the fixture to target any remaining bacteria and viruses.
Cleaning when C. diff is of Concern
Clostridium difficile (C. diff) is a bacteria that is extremely difficult to kill as it is able to survive in unfavorable
conditions. Furthermore, it is an anaerobic, endosporic organism, which means it can survive without
oxygen and form dormant spores to survive harsh conditions. With the risk of severe illness associated with
C. diff, it is recommended that you use a combination of approaches to reduce the risk of contracting C. diff
in your facility.
1. Utilize your facility’s adopted environmental cleaning and disinfection strategy for dealing with C. diff.
2. Activate the fixture for two consecutive 30-minute cycles at a range of less than one meter for best
results, or up to 2 hours for ceiling mounted units (must have a 30-minute break between two 60-minute
cycles).

PURO SENTRY M1 AND M2T USER MANUAL 8 of 8
Operational Mode
By default, your unit will be configured in single cycle mode for a 30-minute run time.
• Single Cycle Mode: In this method, users will manually activate the unit to start a disinfection cycle. The
unit will then run its pre-programmed cycle (i.e. 15 or 30 minutes) one time before entering safe mode
until power is cycled on and off again. Users may select the timeout time, which determines how long
the unit will wait until resuming operation after motion is detected.
Color of Light Meaning
Flashing Green Unit is ready to begin cleaning when
room becomes unoccupied.
Solid Green Unit has successfully completed its
cleaning cycle.
Solid Red
Unit was interrupted during the
cleaning cycle. Cleaning will resume
when room becomes unoccupied
again during the programmed times
for operation.
Flashing Red
One of the safety sensors has detected
an issue. Please see troubleshooting
section for further information.
Each unit has an indicator light that helps you determine
the status of the unit.
Sensor Indicators
Troubleshooting
1. If unit is flashing red, then an issue was detected by the safety sensors. Unplug the unit.
2. Plug the unit back into the wall. Exit the room within 60 seconds.
3. When you return to the room, identify the color of light on the sensor indicator. If unit is green or solid
red, the unit is working properly. If unit is still flashing red, contact PURO Lighting technical support.
4. If unit is non-responsive (i.e. no indicator light showing), please contact PURO Lighting technical support.
Technical Support
Email us at [email protected] or call [phone].
© Copyright 2020 PURO Lighting. All Rights Reserved. PURO, the PURO logo, Helo and Sentry are trademarks
of PURO. All other trademarks are the property of their respective owners. Specifications are subject to change
without notice. This document is for informational purposes only.