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RHT Modbus Transmitter

Description

The 8803006430 (Model RHT-WM-485-LCD) is a high-precision, wall-mounted ambient transmitter designed to continuously monitor temperature and relative humidity within indoor environments. Equipped with an integrated, high-visibility backlit LCD screen, the device offers instant local readouts while driving serial industrial automation tracking systems. It relies on a digital RS485 half-duplex communication interface running standard Modbus RTU protocol, allowing multiple units to be daisy-chained over a single long-distance network loop. Operators can utilise the front-panel tactile buttons or dedicated software to instantly adjust communication parameters, scale active ranges, or display real-time Dew Point telemetry.

Key Features

  • Integrated LCD: Displays real-time local measurements of temperature, relative humidity, or calculated Dew Point via a clear 4.5-digit viewing pane.
  • Digital RS485 Network Communications: Features native Modbus RTU protocol implementation for seamless multi-drop network integration alongside PLCs and SCADA networks.
  • On-Board Field Programming: Permits immediate assignment of hardware address mappings, baud rates, and parity configurations directly using the built-in tactile keypad.
  • Industrial Dual-Shield Design: Combines a tough IP65-rated polycarbonate enclosure to protect internal electronics with an IP40 capsule to optimise sensor safety and air movement access.
  • Psychrometric Computations: Embeds high-level microprocessing to automatically calculate and transmit Dew Point metrics simultaneously alongside raw temperature values.

 

Specifications

Part Number 8803006430
Model/Series RHT-WM-485-LCD
Core Operating Ranges Relative Humidity: 0.0% to 100.0% RH
Sensor Probe Temperature: −40.0°C to +70.0°C
Electronic Case Ambient Limits: 0°C to 70°C
Accuracy Relative Humidity: ±3.0% RH (typical)
Temperature: ±0.5°C
Outputs 2-wire half-duplex RS485 serial communication (Modbus RTU protocol)
Power Supply 12 to 30 vDC supply input (Maximum current draw: 50 mA)
Ingress Protection Ratings Main Electronics Module: IP65 Rated Polycarbonate Enclosure
Sensor Filter Capsule: IP40 Protection
Probe Dimensions: 37.2mm below enclosure