Dwyer RHP Humidity & Temperature Sensor

Dwyer RHP Temperature and Humidity Transmitter (Discontinued – Replaced by RHPX)

Posted on: 23/06/2025

The Dwyer RHP temperature and humidity transmitter has been discontinued and replaced by the RHPX Series. Ideal for HVAC, BMS, and indoor air quality monitoring. DLK offers full replacement support.

Dwyer Series RHP Temperature and Humidity Transmitter (Discontinued)

Replacement model: Dwyer Series RHPX

Overview

The Dwyer Series RHP was a well-known line of temperature and humidity transmitters widely used in HVAC systems, building management systems (BMS), and indoor air quality control applications. With its durable design, stable output signals, and high accuracy, the RHP series had been trusted for years in various environmental monitoring projects.

However, Dwyer has officially discontinued the RHP series, introducing the RHPX series as its direct replacement — an upgraded version featuring advanced sensing technology, higher accuracy, and a modern configuration interface.

Note: This article provides reference information for customers currently using the RHP or seeking a suitable replacement.

Key Technical Specifications of RHP

Specification	Value
Relative humidity range	0 to 100% RH, non-condensing
Humidity accuracy	±2% or ±3% RH depending on model
Temperature range	-40 to 100 °C (depends on probe type)
Output signals	4-20 mA, 0-10 VDC, or Modbus RTU
Mounting types	Wall, Duct, or Remote
Enclosure material	Flame-retardant ABS or polycarbonate
Factory calibration	Stable and reliable factory calibration

Typical Applications

Monitoring temperature and humidity in commercial and industrial HVAC systems
Integration into building management systems (BMS) for offices, data centers, or cleanrooms
Environmental control for warehouses, laboratories, and production areas

Replacement Model: Dwyer RHPX

The Dwyer RHPX Series is the latest generation of humidity and temperature transmitters designed to replace the RHP with enhanced performance and usability:

Improved digital sensor with higher accuracy and longer lifespan
Simple configuration via Modbus or PC software
Modular design for easier installation and maintenance
Wider measurement ranges and greater system integration capabilities

DLK recommends using the RHPX series to replace the RHP for all new installations and retrofits, ensuring continued reliability and compatibility.