EU declaration conformity
Duct temperature | humidity sensor | 24 V DC
Product description
The DSTHF-3 is a dual sensor designed to measure temperature and relative humidity in ducts.
It measures temperature (-30—70 °C) and relative humidity (0—100% rH non-condensing). It offers selectable temperature and relative humidity ranges.
It's compatible with a wide range of low-voltage power supplies. It features three selectable analog/modulating outputs (for temperature, relative humidity, or selectable temperature/humidity).
All parameters are accessible via Modbus RTU (RS485).
Thanks to its bootloader feature, firmware can be updated via Modbus RTU communication.
Protection Standards: It has an IP54 protection rating for the enclosure and an IP20 protection rating for the probe.
This sensor is a reliable solution for applications requiring in-duct temperature and humidity control.
Documents
Additional specifications and description
Measuring temperature and humidity in air ducts is crucial for maintaining occupant comfort, energy efficiency, 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.

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.
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