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EU declaration conformity
Temperature | humidity sensor wall mounting | 24 VAC - VDC
Product description
The RSTHG-3 series consists of advanced room sensors designed to measure indoor temperature, relative humidity, and ambient light.
It measures temperature from 0 to 50°C and relative humidity from 0 to 95% rH (non-condensing). An integrated ambient light sensor allows for adjustable "active" and "standby" light levels.
The sensors offer three analog/modulating outputs for temperature, humidity, or other selectable parameters. All settings are accessible via Modbus RTU (RS458). The devices are compatible with a variety of low-voltage power supplies.
With an IP30 protection standard, these sensors are ideal for indoor use in residential and commercial buildings, providing long-term stability and accuracy to enhance both comfort and system efficiency.
Additional specifications and description
Why are Temperature and Humidity Crucial for Indoor Comfort and Building Health?
Temperature and relative humidity have a direct impact on residents' sense of well-being and comfort. Dry skin and itchy eyes are caused by dry air. Excessive relative humidity causes condensation to form on windows, walls, and ceilings that are colder than the air temperature, potentially damaging building materials and causing odours in poorly ventilated spaces.
Temperature and relative humidity have a direct impact on residents' sense of well-being and comfort. Dry skin and itchy eyes are caused by dry air. Excessive relative humidity causes condensation to form on windows, walls, and ceilings that are colder than the air temperature, potentially damaging building materials and causing odours in poorly ventilated spaces.
What Parameters Does the RSTHG-3 Measure and How Do Its Outputs Function?
The RSTHG-3 measures temperature, relative humidity, as well as ambient light. The temperature and humidity measurements can be used to calculate the dew point. The sensor has three analogue outputs. 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. Output 1 by default provides the measured temperature, and output 2 provides the relative humidity. Output 3 can transmit temperature or relative humidity but is by default inactive. The 3 outputs have an overwrite function that can be activated via Modbus RTU. If active - for example at night - the ventilation will be controlled based on the data mentioned in the relevant Modbus registers and not based on measured temperature or humidity.
How Do the LED Indicators Display Environmental Conditions?
This HVAC transmitter offers a clear, visual indication of the temperature via the green, yellow and red LED. The green LED indicates that temperature is within range. The yellow LED illuminates when the temperature enters the alert range. Red denotes extreme heat or cold. The LEDs can also be used to display relative humidity.
This HVAC transmitter offers a clear, visual indication of the temperature via the green, yellow and red LED. The green LED indicates that temperature is within range. The yellow LED illuminates when the temperature enters the alert range. Red denotes extreme heat or cold. The LEDs can also be used to display 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. This sensor can be supplied with 24 VDC or with 24 VAC and is intended for 3-wire connection. The ground of the output (GND) is internally connected to the ground of the supply voltage (V-). Make sure not to connect this common ground to other devices that are powered by a DC voltage.
How and Where Can the Sensor Be Mounted?
This sensor can be installed indoors on a wall or on a smooth surface. The mounting holes are designed to 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.
How and Where Can the Sensor Be Mounted?
This sensor can be installed indoors on a wall or on a smooth surface. The mounting holes are designed to 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. This sensor requires only little configuration. Once installed, it is almost directly ready to use. Region and season often have an impact on temperature and relative humidity. During installation, these parameters are still changed to the proper values. The other default settings will however be compatible with most applications. If necessary, they can still be altered using the corresponding Modbus registers. For instance, to make the sensor compatible with other devices, a different output type can be chosen: 0-10 VDC, 0-20 mA, 0-100% PWM, and Modbus RTU. The light levels of the LEDs used for status indication are also adjustable. An exhaustive list of every programmable setting is provided by the Modbus register map.
What is the Manufacturing Quality and Protection Rating of the Sensor?
This HVAC transmitter is manufactured in Europe. Each sensor is calibrated and tested in our factory. We use sensor elements and components of high quality. This ensures the long-term stability and accuracy of this HVAC transmitter. The enclosure is dust and moisture resistant to IP30 standards. It should be kept out of direct sunlight to ensure peak performance.
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