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EU declaration conformity
Temperature and Humidity Sensor | Wall mounting | 24 V DC
Product description
The RSTHX-3 series is a versatile room sensor designed to measure temperature, relative humidity, and ambient light. It offers selectable temperature and humidity ranges to suit various needs.
This sensor provides flexible output and communication options, transmitting values via three analog outputs (0-10V default, adjustable) and Modbus RTU. All settings are accessible through the Modbus RTU (RS485) interface. It operates on 24 VDC.
Equipped with an ambient light sensor, the RSTHX-3 series can control ventilation based on occupancy. It features adjustable "active" and "standby" light levels, and the intensity of its status indicator LEDs can also be customized.
The sensors are suitable for indoor use with an IP30 protection standard. They operate in temperatures from 0 to 50 °C and a relative humidity of 0 to 95% rH (non-condensing).
The RSTHX-3 series is a precise, flexible, and smart solution for indoor environment control, ideal for HVAC applications, as well as residential and commercial buildings.
Additional specifications and description
Why do we measure temperature and relative humidity?
Temperature and relative humidity have a significant impact on human comfort and well-being. Dry air can lead to physical irritation and discomfort. Excessive relative humidity, on the other hand, results in condensation on windows, walls, and ceilings that are cooler than the air, potentially damaging building materials and causing unpleasant odours in poorly ventilated spaces.
How is the Sensor Mounted and What are its Power and Wiring Requirements?
Sensor intended for mounting on a wall or flat surface indoors. Mounting holes 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.
The supply voltage is 24 V DC, intended for 4-wire connection. As the ground terminals of the power supply (V-) and output (GND) are not connected internally, a 4-wire cable is required to connect this sensor. 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.
What Parameters Does This Room Sensor Measure, and How are Its Outputs Configured?
Room sensor for measuring temperature, relative humidity and ambient light. Little configuration is required, the sensor can be used almost immediately once it has been installed. Temperature and relative humidity are frequently affected by region and season. These parameters are set to the correct values during installation.
The sensor has three analogue outputs. The three outputs have an overwrite function that can be activated via Modbus RTU. Output type is set to 0-10 V by default, but different output types are available, including 0-10 VDC, 0-20 mA, 0-100% PWM, or Modbus RTU. One of the measured values (temperature / humidity) is transmitted by each of them. For instance, output 1's default setting will transmit 0 V at 0 °C and 10 V at 50 °C. In proportion to the measured temperature and / or relative humidity, each output value changes.
A clear, visual indication of the temperature is offered via the green, yellow and red LED. The green LED shows that the temperature lies within range. The yellow LED turns on when the temperature enters the alert range. The red LED indicates extreme heat or cold. The LEDs can also be used to display relative humidity. The analogue outputs and Modbus RTU both provide access to the measured temperature and relative humidity. Dew point is calculated using the measured values and is accessible through Modbus RTU. Ambient light sensor can be used in applications to control the ventilation system based on the occupancy of the room. The ambient light level is accessible through Modbus RTU. Light intensity of the LEDs used for status indication can be adjusted.
What are the Manufacturing Quality, Durability, and Environmental Considerations for the Sensor?
Manufactured in Europe. Each sensor is calibrated and tested in our factory.
Sensor elements and components of high quality are used, which ensures a long-term stability and accuracy.
Enclosure offers IP30 protection against ingress of dust and moisture.
To ensure optimal performance, the sensor should be protected from direct sunlight.
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