Temperature-Humidity Transmitter
Polwax RHT151 DM
Part Code. 0397
- Without Display
- Modbus RTU RS485
- Duct mounted
- Excellent linearity
- Wide sensing range
- Good long term stability
Polwax RHT151 DM is a duct-mount temperature and humidity transmitter designed for precise and reliable environmental monitoring. Equipped with an integrated display and robust stainless-steel sensor, it delivers accurate real-time measurements of temperature (-40 °C to 85 °C) and relative humidity (0–100 %). Ideal for HVAC systems, cleanrooms, industrial facilities, and automation applications, this transmitter supports outputs like 4-20 mA, RS485 MODBUS RTU, and optional 0-10V, ensuring seamless integration with control and automation systems. The IP54-rated enclosure and included GUI software, calibration certificate, SS adaptor, and manual make it a complete, dependable solution for critical climate monitoring needs.
Product Overview
The Polwax RHT151 DM Series is a duct‑mount temperature and humidity transmitter designed for robust, high‑accuracy environmental monitoring in HVAC systems, industrial facilities, clean rooms, storage areas, and other controlled environments. Featuring an integrated display and precision sensing technology, this series delivers real‑time measurement of temperature and relative humidity to support efficient climate control and process stability.
Built for reliable performance in demanding applications, the RHT151 DM Series combines a durable duct‑mount design with flexible output options such as 4–20 mA, RS485 MODBUS RTU, and optional 0–10 V, enabling seamless integration with building automation and control systems. The IP54‑rated enclosure and included accessories make installation and operation straightforward.
The series includes multiple variants tailored to specific needs:
- RHT151 DM – Standard transmitter with built‑in display for easy on‑site readings.
- RHT151 DM (HT) – High‑temperature variant for environments with elevated temperature requirements.
- RHT151 DM (HT+HA) – High‑temperature and high‑accuracy model for critical applications demanding superior precision.
With its combination of accuracy, durability, and versatility, the Polwax RHT151 DM Series is ideal for maintaining optimal environmental conditions in diverse climate‑sensitive applications.
Polwax RHT151 DM is a duct-mount temperature and humidity transmitter with an integrated display, offering reliable real-time monitoring for HVAC, industrial, and controlled-environment applications.
The standard RHT151 DM variant delivers accurate temperature and relative humidity measurement with built-in display functionality, ideal for duct monitoring and climate control systems. Polwax RHT151 DM (HT) is the high-temperature version of the RHT151, engineered for environments with elevated temperature ranges while maintaining precise humidity monitoring.
Polwax RHT151 DM (HT+HA) combines high-temperature capability with high-accuracy sensing, making it suitable for demanding applications requiring exceptional measurement precision in both temperature and humidity.
Applications
Agriculture & Greenhouses
Maintain optimal climate conditions in greenhouses with the Polwax RHT151 DM. Its precise temperature and humidity monitoring supports healthy crop growth and efficient environmental control.
Pharmaceutical
Ensure strict compliance and product safety in pharmaceutical facilities. The RHT151 DM provides accurate real‑time environmental data for cleanrooms, storage, and production areas.
Storage & Warehouse
Protect inventory and maintain quality control with reliable temperature and humidity monitoring using the Polwax RHT151 DM, ideal for large storage and warehouse spaces.
Food & Beverage
Maintain product quality and safety in food processing and storage. The RHT151 DM ensures accurate monitoring of temperature and humidity to extend shelf life and prevent spoilage.
HVAC
Optimize HVAC system performance with the Polwax RHT151 DM. Accurate sensing enables efficient airflow control, energy savings, and enhanced comfort in duct-mounted applications.
Clean Rooms
Support critical contamination control in cleanrooms. The RHT151 DM delivers high-precision environmental monitoring to maintain stable conditions in biotech, pharma, and high-tech manufacturing.
Technical Data
| Media Compatibility | Air, non-combustible, non-corrosive gases |
| Model No |
RHT151 DM / RHT151 DM (HT) / RHT151 DM (HT+HA) |
| Part Code |
0397 2151 / 0397 2153 / 0397 2154 |
| Measuring Range |
T: -40 to 85°C & RH: 0–100% / T: -40 to 125°C & RH: 0–100% / T: -40 to 125°C & RH: 0–100% |
| Accuracy |
T: ±0.4°C & RH: ±1.8% / T: ±0.4°C & RH: ±1.8% / T: ±0.1°C & RH: ±0.8% |
| Display | Without Display |
| Inputs | Temperature & Humidity |
| SS Probe Length | 150 mm |
| Dimensions | 75 × 35 × 75 mm |
| Protection Class | IP54 |
| Mounting | Duct Mount |
| Language | English |
| Supply Voltage | 24V DC |
| Output | 4–20mA, RS485 MODBUS RTU / 0–10V (Optional) |
| Scope of Supply | Calibration Certificate, GUI Software, SS Adaptor, Manual |
Temperature & Humidity Transmitter – RHT 151DM
The Polwax RHT 151DM is a high-precision duct-mounted temperature and humidity transmitter, ideal for HVAC systems, clean rooms, pharmaceutical facilities, and industrial applications. Featuring a stainless steel 150 mm sensor and IP54 protection, it ensures accurate real-time monitoring for temperature (-40°C to 85°C) and relative humidity (0–100%).
Display Options
Available with integrated display for instant on-site readings.
Mounting
Duct-mounted design for precise environmental monitoring in airflow systems.
Sensor & Accuracy
150 mm stainless steel sensor, temperature accuracy ±0.4°C, humidity accuracy ±1.8%.
Output Options
Supports 4–20mA, RS485 MODBUS RTU, and optional 0–10V output for automation integration.
Protection & Stability
IP54-rated enclosure ensures durability and reliable operation in industrial environments.
Supply Voltage
Operates on standard 24V DC for continuous and stable performance.
User-Friendly Software
GUI software simplifies configuration, range selection, and device management.
Applications
Perfect for HVAC, cleanrooms, pharma, food & beverage, storage & warehouse facilities.
