Room sensor CO2with sound alarm
Protronix s.r.o., Pardubická 177, Chrudim 537 01, Czech Republic www.protronix.cz/en/ www.careforair.eu/en/
um-nlii-co2-r-5-a-en-v4-211115
Room sensor NLII-CO2 is used to continuously
monitor air quality inside buildings and then
control ventilation (HVAC) systems according to
current levels of internal air quality. The sensor
measures concentration of carbon dioxide (CO2) in
air. It is suitable for schools, offices, classrooms,
shopping centers, homes, restaurants, fitness
centers, commercial buildings, etc.
measures CO2
analog voltage/current output
2x output relay –2x NO/C
sound signalization –alarm
two modes of relay switching
maintenance during operation not required
long life and stability
Description
The measuring of CO2is based on the principle of infrared
radiation attenuation dependence on the CO2concentration
in the air (NDIR). Built-in auto-calibration function ensures
very good long term stability.
The sensor has built-in one analog output for the actual
concentration of CO2. Relay trigger level can be set by SET
POINT rotary switch.
Relay switching is indicated simultaneously with a short (1,5s)
audible signal and yellow LED light.
The way of relay switching can be set by a jumper –5s pulses
when the CO2concentration exceeds and falls below the set
CO2level for e.g. opening and closing a skylight, or standard
switching, where relays are closed until the measured CO2
concentration drops under the set CO2level.
So the sensor efficiently manages ventilation and heat
recovery units, based on current room air quality.
The current air quality can easily be determined by looking at
the three LED indicators. The eco level means good indoor air
quality necessary to achieve a sense of well-being and at the
same time optimal energy costs for heating, ventilation or air
conditioning.
Explanation of abbreviations and technical terms can be
found on our website in the Glossary section.
Technical data
Type of sensor / Order code
1) It is possible to select the desired type of analog output by a jumper on the electronics board. Minimum achievable output value
corresponds to minimum value of the measuring range.
Working humidity
no condensing
