.webp "Indoor air quality sensor")
.webp "Indoor air quality meter")
.webp "Indoor air quality transmitter")
.webp "Indoor air quality detector")
.webp "Indoor air quality controller")
.webp "Indoor air quality regulator")
EU declaration conformity
TVOC controller | wall mounting | LED indicators, 24 VDC - PoM
Product description
Multiple Measurements: It measures temperature, relative humidity, air quality (TVOC), and ambient light levels.
Flexible Connection: Operates on 24 VDC and can be connected via either terminal blocks or an RJ45 connector.
Direct Control: The device’s algorithm uses these measurements to control a single output for managing an EC fan, AC fan speed controller, or a damper actuator.
Adjustable Output Type: The output signal is selectable, with a default of 0-10 V, and can be easily adjusted via Modbus RTU.
Full Adjustability: All measurements and settings, including the light intensity of the status LEDs, are available and adjustable via Modbus RTU communication.
Replaceable Sensor: The TVOC sensor element is replaceable, which simplifies maintenance.
Occupancy-Based Control: The ambient light sensor can be used to control the ventilation system based on room occupancy.
Durable Enclosure: The enclosure provides IP20 protection against dust and moisture.
Additional specifications and description
What Is TVOC and How Does the Sensor Indicate Air Quality?
This HVAC transmitter offers a clear, visual indication of the air quality via the green, yellow and red LED. The green LED indicates that the TVOC level is within range - there is sufficient fresh air supply. When the TVOC level enters the alert range, the yellow LED lights up. Red means: TVOC out of range or insufficient fresh air supply. The measured temperature, relative humidity, TVOC and ambient light level are available via Modbus RTU.
How Does the Sensor Control the HVAC System?
The output of this sensor can control an EC fan, an AC fan speed controller or a damper actuator. The output value varies proportionally in function of the measured temperature, humidity and TVOC concentration. When more fresh air is required, the sensor will increase the fan speed or open the damper.
What Are the Sensor's Power Supply and Connection Options?
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 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.
This sensor doesn't require any 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. For example, a different output type can be selected to make it compatible with other devices: 0-10 VDC / 0-20 mA / 0-100 % PWM / Modbus RTU. Also the light intensity of the LEDs for status indication is adjustable. The Modbus register map provides a complete overview of all adjustable settings.
How Are the Sensor's Calibration, Durability, and Mounting Performed?
Each sensor is calibrated and tested in our factory. In the unlikely event of TVOC 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.
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