.webp "Duct temperature sensor")
.webp "Duct temperature meter")
.webp "Duct temperature transmitter")
.webp "Duct temperature detector")
.webp "Duct temperature HVAC sensor")
.webp "Duct temperature HVAC transmitter")
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.
Additional specifications and description
Why is Duct Temperature and Humidity Measurement Crucial for HVAC Systems?
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.
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.
How Does This Sensor Measure and Where Should It Be Installed for Optimal Performance?
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.
What Are the Sensor's Analog Output Functions and Default Settings?
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.
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.
What Are the Sensor's Power and Wiring Requirements?
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.
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.
What is the Manufacturing Quality, Accuracy, and Protection Rating of the Sensor?
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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