Function
The three coloured LED lights indicate the CO
2
concentration:
Green:
400 – 1000 ppm
Yellow:
1000 – 2000 ppm
Red:
>2000 ppm
It is possible that a CO
2
concentration can reach 2000 ppm within a short time depending on
the room size, number of people in the room and other variables. The CO
2
concentration is
typically higher in rooms where windows are usually closed for extended time, which is the case
in winter; therefore, it is lower in summer.
If the yellow or red LED light goes on, you should ventilate the room. The indication may not
change immediately as the room air takes some time to mix with the outside air.
Some people perceive air as stale when the CO
2
concentration is more than 1000 ppm.
Detailed information on carbon dioxide and the effects of certain gas concentrations
on humans (as well as limits for living and working areas in your country) can be
found on the Internet or in specialist literature. Always check the source of data/
information (it should be reliable) and make sure it is up-to-date; in Germany, for
example, it is the Environment Agency: www.umweltbundesamt.de).
Switching the alarm sound on/off
The alarm is triggered by the yellow LED light (long beeps) or red LED light (short beeps).
Set the switch (3) on the bottom of the product to position “I” to enable the alarm sound or to
position “O” to disable the alarm sound.
Function test
A function test can be performed by slowly blowing into the sensor opening (4) while exhaling.
If the product functions properly, the high CO
2
content will cause the red LED light to go on after
a few seconds with alarm activation.
It may take some time for the yellow or green LED light to go on again until the air saturated
with carbon dioxide in the housing is mixed with the normal air room.
Care and cleaning
Before cleaning the product, always switch it off and unplug the power adapter from the mains
socket.
Never use aggressive detergents, rubbing alcohol or other chemical solutions, as these may
damage the casing or cause the product to malfunction.
Use a dry, lint-free cloth to clean the exterior casing.
Blow into the sensor opening to remove dust inside it. Do not use any blowers for this purpose
(e.g. a spray type blower, a compressor or the like)!
Disposal
Electronic devices are recyclable waste and must not be placed in household waste.
At the end of its service life, dispose of the product in accordance with applicable
regulatory guidelines.
Technical data
a) CO
2
light stick
Operating voltage ..............................12 V/DC
Beep ..................................................approx. 80 dB at a distance of 10 cm
Dimensions ........................................Mounting bracket Ø 90 mm
Light stick housing Ø 50 mm
Total height 390 mm (in vertical position)
Weight ...............................................450 g
Ambient conditions ............................Temperature range from +5 °C to +45 °C, 5% to 90%
relative humidity, non-condensing
b) Power adapter
Operating voltage ..............................100 – 240 V/AC, 50/60 Hz
Output ................................................12 V/DC, 1 A
This is a publication by Conrad Electronic SE, Klaus-Conrad-Str. 1, D-92240 Hirschau (www.conrad.com).
All rights including translation reserved. Reproduction by any method, e.g. photocopy, microfilming, or the capture in
electronic data processing systems require the prior written approval by the editor. Reprinting, also in part, is prohibited.
This publication represent the technical status at the time of printing.
Copyright 2021 by Conrad Electronic SE.
*2368700_V1_1021_02_VTP_m_en
