Precision Temperature & Humidity Monitoring for Industrial Environments
The Polwax ClimaTRANS RHT100 is a high-performance, industrial-grade temperature and relative humidity transmitter designed for reliable environmental monitoring in applications where accuracy, stability, and consistent measurement are essential.


Temperature-Humidity Transmitter
Polwax ClimaTRANS RHT100
- High-accuracy digital temperature and humidity sensing
- Dual-parameter measurement: Temperature + Relative Humidity
- User-Friendly Interface
- Compact & Lightweight Design
- Fast response time
- Compact, rugged industrial design
- Easy installation (Wall / Duct Mount)
- Long-term stability with low measurement drift
- Real-time local display of environmental conditions
The Polwax ClimaTRANS RHT100 is a high-performance, industrial-grade temperature and relative humidity transmitter designed for reliable environmental monitoring in applications where accuracy, stability, and consistent measurement are essential. Using advanced digital sensing technology, the RHT100 measures temperature and relative humidity and provides an RS485 Modbus RTU communication interface for integration with monitoring and automation systems. Its bright TFT display provides real-time visibility of measured values, allowing operators to monitor environmental conditions directly at the installation point.
Product Overview
Product Overview
Polwax ClimaTRANS RHT100 is an industrial-grade Temperature & Humidity Transmitter with Display, designed for accurate and reliable environmental monitoring. It measures temperature and relative humidity using advanced digital sensing technology and provides real-time readings through its bright TFT display.
With RS485 Modbus RTU communication, the RHT100 can be integrated with BMS, PLC, SCADA and IoT-based monitoring systems. Its compact, rugged design, IP65 protection, long-term stability and flexible wall or duct mounting make it suitable for a wide range of applications including HVAC, pharmaceutical cleanrooms, warehouses, cold storage, laboratories, healthcare, food & beverage, data centers, agriculture and industrial environments.
In pharmaceutical manufacturing, maintaining controlled temperature and humidity conditions is important for product quality and regulatory requirements.
The ClimaTRANS RHT100 can provide local real-time visibility of environmental conditions in cleanroom environments, while its digital output enables integration with monitoring and automation systems.
A pharmaceutical application described in the datasheet highlights challenges including HVAC-related humidity fluctuations, lack of real-time local monitoring, manual recording and maintaining audit-ready environmental logs. The documented outcome included more stable environmental conditions, reduced manual intervention, improved environmental records and better operator visibility.
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Technical Data
Media compatibility
Air, non combustible, non corrosive gases
Model No
RHT100
Part Code
0396 3030
Display
With Display
Measuring Range
T: -30 to 80 °C. & RH: 0-100%
Units
°C / °F / %RH
Inputs
Temperature & Humidity
Operating Temperature
-20°C to +60°C
Storage Temperature
-40°C to +85°C
Accuracy
± 0.3 °C (0 °C to 60 °C),± 1.8 %RH to 23 °C (0 % to 90 %RH)
Dimensions
120 x 80 x 55 mm
Protection Class
IP65
Mounting
Wall Mount / Duct Mount
Language
English
Supply Voltage
12 VDC to 30 VDC; maximum consumption 70 mA +/- 10% @ 24 Vdc
Output
RS485 MODBUS RTU
Scope Of Supply
Calibration Certificate , GUI Software, Manual
Operating Humidity
0–95% RH (Non-condensing)
Compliance & Standards
CE Certified, EMC Compliance (Industrial Environment), RoHS Compliant & GMP
Sensors
Precision Measurement Sensors
Equipped with high-accuracy sensors, the Polwax RHT ensures precise readings of both temperature and humidity, making it ideal for environments where accurate climate control is critical, such as pharmaceutical storage and clean rooms.
Fast Response Time
The sensors in the Polwax RHT are designed for rapid response, capturing temperature and humidity changes within seconds. This feature allows for real-time monitoring and swift adjustments to environmental conditions, ensuring optimal performance in sensitive applications.
Long-Term Stability and Reliability
The robust sensor design provides long-term stability, maintaining accuracy and reliability even in challenging conditions. With IP65/IP67 protection options, the Polwax RHT sensors offer dependable performance in industrial and outdoor environments.
Applications
Agriculture & Greenhouses
The ClimaTRANS RHT100 is suitable for environmental monitoring in agricultural facilities and greenhouses. Temperature and humidity measurements provide visibility of the growing environment, helping operators observe changes in environmental conditions. The transmitter can be installed using wall or duct mounting depending on the monitoring requirement.
Storage & Warehouse
The ClimaTRANS RHT100 is suitable for monitoring temperature and humidity in warehouses, storage areas and cold-storage environments. Continuous environmental visibility helps operators monitor storage conditions for temperature-sensitive products and identify changes that may require attention. The transmitter’s industrial design and IP65 protection make it suitable for demanding storage.
Food & Beverage
HVAC
The ClimaTRANS RHT100 enables continuous monitoring of temperature and relative humidity in HVAC systems and building environments. Its real-time display provides local visibility of environmental conditions, while the RS485 Modbus RTU interface allows integration with building management and monitoring systems. It is suitable for offices, commercial buildings, schools.
Pharmaceutical
Temperature and humidity monitoring is essential in pharmaceutical manufacturing and controlled cleanroom environments. The ClimaTRANS RHT100 provides accurate measurement and real-time visibility of environmental conditions, supporting controlled manufacturing areas and helping operators identify variations in temperature or humidity. Its Modbus RTU communication also supports.
Industrial Processes
The ClimaTRANS RHT100 can be used for temperature and humidity monitoring across industrial processes and production environments. Its industrial-grade construction, IP65 protection, digital measurement technology and RS485 Modbus RTU communication make it suitable for applications where reliable environmental data and system integration are required.
Documents
Accurate Wall-Mounted Temperature & Humidity Monitoring
The Polwax RHT WM Temperature-Humidity Transmitter is designed for precise temperature and relative humidity measurement in HVAC systems, pharmaceutical facilities, cleanrooms, laboratories, hospitals, warehouses, offices, and industrial environments. Featuring a compact wall-mounted design with RS485 Modbus RTU, 4–20 mA, and optional 0–10 V outputs, it provides reliable real-time environmental monitoring and seamless integration with Building Management Systems (BMS) and industrial automation.
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