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Grey water proof enclosure with duct probe
Grey water proof enclosure with duct probe
Grey water proof enclosure with duct probe
Grey water proof enclosure with duct probe
Grey water proof enclosure with duct probe
Grey water proof enclosure with duct probe
Circuitboard with components, terminals

Duct temperature | humidity sensor | 24 V DC

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Product description

This duct transmiIter measures the temperature as well as the relative humidity in HVAC applications.

The dew point is calculated using the measured values. The supply voltage is 24 V DC. The measured values are communicated via three analogue outputs and Modbus RTU. The output type can be changed. Modbus RTU can be used to change all of the settings.

Article code
Duct temperature and humidity sensors
Current stock
18 U.
Factory lead time
5 Week(s)

Additional specifications and description

Why do we measure temperature and humidity in air ducts?
Measuring temperature and humidity in air ducts is crucial for maintaining occupant comfort, energy efficiency, indoor air quality, equipment protection, and compliance with regulations. It allows HVAC systems to adjust and control the environment effectively, ensuring that it meets the desired standards and requirements.
Optimised for air ducts
This HVAC transmitter measures temperature and relative humidity in air ducts. The dew point is calculated using these measurements. This sensor works best when installed in a straight section of the air duct. Avoid installing near filters, fans, cooling coils, and other sources of turbulent air. Place the sensor correctly in relation to the airflow direction. For more information, please refer to the mounting instructions.Temperature sensor in duct
How does it function?
There are three analogue outputs on this sensor. Each one transmits one of the measured values. For example, output 1 will transmit 0 V at 0 °C and 10 V at 50 °C by default. Each output value changes in proportion to the measured temperature or relative humidity. The measured temperature is by default available  via output 1, and the relative humidity via output 2. Output 3 is disabled, but it can transmit temperature or relative humidity.
Easy to connect
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 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.
Easy to use
This sensor requires very little configuration. It is almost directly usable once it has been installed. Temperature and relative humidity are often region- and seasonal-specific. These parameters are still adjusted to the correct values during installation. The other default settings will probably be suitable for most applications. However, they can also be adjusted via the respective Modbus registers if necessary. A different output type, for example, can be selected to make it compatible with other devices: 0-10 VDC; 0-20 mA; 0-100% PWM; Modbus RTU. The Modbus register map provides an exhaustive list of all programmable settings.
High quality
This HVAC transmitter was made in Europe. In our factory, each sensor is calibrated and tested. We use high-quality sensor elements and components. This ensures the HVAC transmitter's long-term stability and accuracy. The enclosure is dust and moisture resistant to IP54 standards. The sensor element is built into the probe of the duct sensor. This probe has an opening through which the air flow can make direct contact with the sensor element. The sensor probe itself has an IP20 rating. 

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