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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
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 | visible CO2 alert, 24 VDC


Product description

HVAC transmitter to measure temperature, relative humidity, CO2 (carbon dioxide) and ambient light level. The supply voltage is 24 VDC. The green, yellow and red LED indicators provide a visual indication of the CO2 level. The measured values are transmitted via three analogue outputs and via Modbus RTU communication. The default output type is 0-10 V. Different output types can be selected. 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 CO2 sensor is used in schools, office buildings, restaurants, etc. to monitor the carbon dioxide level and to check if sufficient fresh air is supplied into the room.


Article code RSMFF-2R
GTIN 0.540.100.301.136.2
Category Room CO2 sensors
Available
Current stock 47 U.
Factory lead time 4 Week(s)
Documents

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. 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 measured temperature, relative humidity and CO2 level are available via the three analogue outputs and via Modbus RTU. The dew point and ambient light level are available via Modbus RTU.

How does it work?
This sensor has three analogue outputs. Each of them transmits one of the measured values. E.g. by default, output 1 will transmit 0 V at 0 °C and 10 V at 50 °C. Each output value varies proportionally in function of the measured temperature, humidity or CO2 concentration. The measured temperature is available via output 1, relative humidity via output 2 and CO2 concentration via output 3.

4-wire connection
The cage clamp terminal blocks reduce wiring and installation time. They eliminate the need for routine maintenance and guarantee a reliable contact for solid or stranded wires. The supply voltage is 24 VDC. The ground terminals of the power supply (V-) and output (GND) are internally not connected. This means that a 4-wire cable is required to connect this sensor. Most 24 VDC power supplies offer protection against short circuit, overload and overvoltage. A 24 VDC supply voltage increases the safety and reliability of your installation.

Easy to use!
This sensor doesn't require configuration. Once installed, it is ready to use. The default settings will do for most applications. If necessary, the settings can be adjusted via Modbus RTU.
E.g. a different output type can be selected to make it compatible with other devices: 0-10 VDC / 0-20 mA / 0-100 % PWM.  Also the light intensity of the LEDs for status indication is adjustable. The Modbus register map provides a complete overview of all adjustable settings.

The best quality and reliability
This CO2 transmitter is manufactured in Europe. Each sensor is calibrated and tested in our factory. In the unlikely event of CO2 sensor element failure, this module can be replaced. We use sensor elements and components of high quality. This ensures the long-term stability and accuracy of this HVAC transmitter. The enclosure offers an IP30 protection against ingress of dust and moisture. It can be mounted on a wall indoors. To ensure optimal performance, it should be protected from direct sunlight.