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White plastic enclosure with cutouts for air flow, 3 LEDs and white
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White plastic enclosure with cutouts for air flow, 3 LEDs and white
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 | 24 V DC - PoM


Product description

Temperature, relative humidity, CO2, and ambient light level are all measured by this room transmitter. The CO2 level is visually indicated by the green, yellow, and red LED indicators.

The supply voltage is 24 V DC and can be connected using either the terminal blocks or the RJ45 connector. The measured values are communicated via three analogue outputs and Modbus RTU.
The output type is set to 0-10 V by default but various output types are available. Ambient light detection is used in many applications to control the ventilation system based on the occupancy of the room. Modbus RTU communication allows for the adjustment of all settings.

The CO2 sensor element can be replaced. The light intensity of the LEDs used for status indication can also be adjusted. This CO2 meter is commonly used in schools, office buildings, restaurants, and other public places to measure carbon dioxide levels and to ensure that adequate fresh air is supplied into the room.

Article code
RSMFH-3
GTIN
0.540.100.301.886.6
Category
Room CO2 sensors
Available
Current stock
1 U.
Documents
EU declaration conformity
EU declaration conformity

EU declaration conformity

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. 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 and CO2 level are available via the three analogue outputs and via Modbus RTU communication. The dew point and ambient light level are available via Modbus RTU communication.
 
Three analogue outputs to transmit the measured values
This sensor has three analogue outputs. Each of them transmits one of the measured values. E.g. by default, output 1 will transmit 0 Volt at 0 °C and 10 Volt 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. By default the output type is 0-10 Volt. Other output types can be selected via de Modbus holding registers. 
 
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 that CO2 levels are too high or that there is insufficient fresh air supply. The ranges can be adjusted via the Modbus holding registers. The LED indicators can visualise the status of one of the three measured values, but is set to CO2 by default.
 
RJ45 socket or terminal blocks?
This sensor offers you the choice to connect it via the cage clamp terminal blocks or via the RJ45 connector. Supply voltage and Modbus RTU communication can be connected via the RJ45 connector. Via the terminal blocks it is possible to connect the outputs, Modbus RTU communication and the supply voltage. Never connect the supply voltage via the RJ45 connector and the terminal blocks simultaneously. The supply voltage is 24 V DC. 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 V DC power supplies offer protection against short circuit, overload and overvoltage. A 24 V DC supply voltage increases the safety and reliability of your installation. 
 
Photoacoustic sensing element - ABC logic
Because photoacoustic sensors are highly sensitive and specific, they can detect a wide range of gases, including pollutants, trace gases, and volatile organic compounds. The use of specific infrared wavelengths corresponding to CO2 absorption lines reduces interference from other gases. The ABC logic self-calibrating algorithm is enabled by default. This algorithm is intended for use in applications where CO2 concentrations will fall to outside ambient conditions (400 ppm) at least once (15 minutes) in a 7-day period, as is common during unoccupied periods. The sensor will reach operational accuracy after 25 hours of continuous operation when exposed to 400 ppm ±10 ppm CO2 ambient reference levels of air. 

Surface mounting How to install a CO2 sensor
This sensor can be mounted on a wall or a surface indoors. The mounting holes are designed to accommodate standard European wall mounting boxes. Two screws are required to secure the sensor to the wall mounting box. The sensor enclosure will completely enclose the wall mounting box. To ensure peak performance, keep the sensor out of direct sunlight. 
 
Enclosure with contemporary design
The enclosure is designed for indoor use. It offers an IP30 protection against ingress of dust and moisture. The enclosure is designed and manufactured in-house in Sentera Plastics. It is exceptionally strong thanks to the use of high quality r-ABS plastic. Thanks to its contemporary modern design, this sensor can be used in most interior styles.

∞ Monitoring air quality

How a CO2 sensor works

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Remarks, reviews & ratings

11/12/2023
Информацията за нивата на СО2 в затворени помещения става все по-актуална особено през зимата. Този сензор осигурява прецизни показания, а наблюдението в реално време чрез приложение е изключително полезно.
07/12/2023
Der CO2-Sensor hat meine Erwartungen mit seinem modernen Design und seinen präzisen Messwerten übertroffen. Seine Echtzeit-Überwachung über Senteraweb gibt Sicherheit und macht ihn zu einer unverzichtbaren Ergänzung für alle, denen die Luftqualität in Innenräumen wichtig ist.
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