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White plastic enclosure with cutouts for air flow, 3 LEDs and white lens
right
White plastic enclosure with cutouts for air flow, 3 LEDs and white lens
White plastic enclosure with cutouts for air flow, 3 LEDs and white lens
White plastic enclosure with cutouts for air flow, 3 LEDs and white lens
White plastic enclosure with cutouts for air flow
White plastic enclosure with cutouts for air flow
Electronic circuit in black enclosure

CO2 sensor | wall mounting | LED indicators, PoM


Product description

Room sensor to measure temperature, relative humidity, CO2 (carbon dioxide) and ambient light level. The supply voltage is 24 VDC PoM. This means that Modbus RTU communication and 24 VDC power supply can be connected via one RJ45 connector. The green, yellow and red LED indicators provide a visual indication of the CO2 level. The measured values are transmitted via Modbus RTU communication. The CO2 sensor element is replaceable. In many applications, the ambient light detection is used to control the ventilation system in function of the occupancy of the room. All settings can be adjusted via Modbus RTU communication. Also the light intensity of the LEDs for status indication is adjustable. Typically, this sensor is used in buildings to monitor the CO2 level and to check if sufficient fresh air is supplied into the room. Typically, this CO2 sensor is used in schools, office buildings, restaurants, etc. It can be used for CO2 control in school classrooms and check if sufficient fresh air is supplied into the classroom.




Article code
RSMFM-2R
GTIN
0.540.100.301.139.3
Category
Room CO2 sensors
Available
Current stock
24 U.
Factory lead time
4 Week(s)

Additional specifications and description

 
Is there sufficient fresh air supply?
People produce CO2 or carbon dioxide while breathing. That makes CO2 concentration a good indicator for the occupancy and activity level in a space. In many applications, CO2 sensors are used as an indicator for the ventilation requirements. The higher the occupancy or activity level, the more fresh air supply is required to maintain good indoor air quality. That is why in many applications, CO2 sensors are used as an indicator for the ventilation requirements. Next to CO2, this sensor also measures temperature, relative humidity and ambient light level. The measured temperature, relative humidity, CO2 level, dew point temperature and ambient light level are available via Modbus RTU communication. This sensor does not have analogue outputs which makes it simpler and more cost efficient.
   
Visual indication of the measured value
This HVAC transmitter offers a clear, visual indication of the CO2 level via the green, yellow and red LED. The green LED indicates that the CO2 level is within range - there is sufficient fresh air supply. When the CO2 level enters the alert range, the yellow LED lights up. Red means: CO2 out of range or insufficient fresh air supply. The ranges can be adjusted via the Modbus holding registers. The LED indicators can visualize the status of one of the three measured values, by default CO2
 
Reduced installation time
One RJ45 connector is all it takes to connect this sensor! Modbus RTU communication and 24 VDC power supply are connected via one UTP cable - we call it Power over Modbus or PoM. All measured values are available via Modbus RTU communication. To facilitate wiring, we recommend to use the Sentera 24 VDC power supplies with RJ45 connector. These power supplies offer protection against short circuit, overload and overvoltage. A 24 VDC supply voltage increases the safety and reliability of your installation.
 
Surface mounting Wall socket and plastic box with pcb
This sensor can be installed indoors on a wall or on a surface. The mounting holes are adapted to standard European wall mounting boxes. The sensor can be attached to the wall mounting box with two screws. The sensor enclosure will cover the entire wall mounting box. To ensure optimal performance, the sensor should be protected from direct sunlight.
 
  
Easy to use!
This sensor doesn't require configuration. Once installed, it is ready to use. The default settings will do for most applicationsIf necessary, the settings can be adjusted via Modbus RTU communication. E.g. the temperature range, the relative humidity range or the CO2 range can be adjusted via Modbus RTU communication.  Also the light intensity of the LEDs for status indication is adjustable. The Modbus register map provides a complete overview of all adjustable settings. 
     
Self-calibrating to compensate sensor drift
The ABC logic self-calibrating algorithm is by default enabled. This algorithm is designed to be used in applications where CO2 concentrations will drop to outside ambient conditions (400 ppm) at least one time (15 minutes) in a 7day period, which is typically seen during unoccupied periods. The sensor will reach its operational accuracy after 25 hours of continuous operation at a condition that it was exposed to ambient reference levels of air at 400 ppm ± 10 ppm CO2. To ensure optimal performance, it should be protected from direct sunlight. The green, yellow and red LED offer a clear visualization of the measured CO2 level.
  
The advantages of Modbus RTU communication
The values are available via the Modbus input registers of this sensor. Reading the measured values is possible via SenteraWeb - the online HVAC platform, via 3SModbus software, via a BMS system or via another Modbus master device. Reading the measured values via Modbus offers many advantages. The most important are: less sensitive to interference than analog signals and the possibility to use longer cables. Cable lengths up to 1.000 m are possible.
  
 
White plastic enclosure
 
 
  
  

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