.webp "Wall temperature sensor")
.webp "Wall temperature meter")
.webp "Wall temperature transmitter")
.webp "Wall temperature dew point sensor")
.webp "Wall temperature dew point transmitter")
.webp "Wall temperature condensation sensor")
EU declaration conformity
Ambient temperature | wall temperature | humidity sensor | PoM supply
Product description
The RWTHMP-2 series is a comprehensive room sensor that measures ambient temperature, relative humidity, ambient light, and wall temperature. It offers selectable ranges for both temperature (0–50 °C) and humidity (0–100% rH).
The sensor is powered by 24 VDC PoM (Power over Modbus) and communicates via a single RJ45 connector. All measured values are transmitted through Modbus RTU, which also provides access to all parameters and allows for firmware updates via a bootloader.
An integrated ambient light sensor enables smart control, allowing for ventilation based on occupancy. The light intensity of the LED indicators is also adjustable.
With an IP30 protection standard, the sensor ensures long-term stability and accuracy. It operates in temperatures from 0 to 50 °C and a relative humidity of 0 to 100% rH (non-condensing), making it a reliable solution for indoor environment control.
Additional specifications and description
Why is Measuring Wall Temperature Important for Comfort and Condensation Risk?
This sensor not only measures the ambient temperature and relative humidity, but also the wall temperature. This information makes it possible to estimate the risk of condensation very accurately. 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. By measuring the temperature of the wall, the risk of condensation formation can be calculated more accurately.
What Parameters Does the Sensor Measure and How Are They Displayed?
This sensor measures the temperature of the wall, the ambient temperature, the relative humidity, and the level of light in the room. The dew point is calculated using the temperature and humidity measurements. The LED indicators provide a clear visual indication of the current temperature. The green LED indicates that the temperature is within the acceptable 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. Modbus RTU provides access to the measured temperature, relative humidity, dew point, and ambient light level.
How is the Sensor Powered and Connected Using Power over Modbus (PoM)?
This RWTHM-2 can be connected with just one RJ45 connector. Power over Modbus, or PoM, connects Modbus RTU communication and a 24 V DC power supply via a single cable. Modbus RTU communication makes all measured values available. To facilitate wiring, we recommend using Sentera 24 V DC power supplies with RJ45 connectors. These power supplies provide short-circuit, overload, and overvoltage protection. A supply voltage of 24 V DC improves the safety and reliability of your installation.
What Are the Sensor's Configuration and Customization Options?
This sensor measures the temperature of the wall, the ambient temperature, the relative humidity, and the level of light in the room. The dew point is calculated using the temperature and humidity measurements. The LED indicators provide a clear visual indication of the current temperature. The green LED indicates that the temperature is within the acceptable 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. Modbus RTU provides access to the measured temperature, relative humidity, dew point, and ambient light level.
How is the Sensor Powered and Connected Using Power over Modbus (PoM)?This RWTHM-2 can be connected with just one RJ45 connector. Power over Modbus, or PoM, connects Modbus RTU communication and a 24 V DC power supply via a single cable. Modbus RTU communication makes all measured values available. To facilitate wiring, we recommend using Sentera 24 V DC power supplies with RJ45 connectors. These power supplies provide short-circuit, overload, and overvoltage protection. A supply voltage of 24 V DC improves the safety and reliability of your installation.
What Are the Sensor's Configuration and Customization Options?
This sensor requires very little setup. It is almost immediately ready to use after installation. Temperature and relative humidity are frequently affected by region and season. During installation, these parameters are still set to the correct values. The other default settings should be sufficient for most applications. If necessary, they can be adjusted using the respective Modbus registers.
What is the Manufacturing Quality 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 IP30 standards. It can be mounted on a wall or a surface indoors and should be kept out of direct sunlight to ensure peak performance.
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