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RHT Modbus Transmitter

Description

The 8803116430 is an advanced, microprocessor-based climate transmitter engineered for high-precision environmental monitoring within ventilation ducts and environmental chambers. Outfitted with an integrated, backlit LCD screen and a 150mm insertion probe, it delivers clear visual feedback alongside robust serial communications. The device utilises a digital RS485 network interface running native Modbus RTU protocol, enabling seamless daisy-chain system deployment and remote control configuration. System engineers can leverage the free DigiConfig software utility to quickly modify network communication parameters, alter sensor scaling variables, or assign fields to display or transmit real-time calculated Dew Point telemetry.

Key Features

  • Integrated LCD Interface: Displays real-time local measurements of temperature, relative humidity, or psychrometric Dew Point values directly at the duct interface.
  • Digital RS485 Network Communications: Employs the industry-standard Modbus RTU protocol for effortless multi-drop loop integration and simplified system routing.
  • 150mm Duct Probe: Constructed for deep duct penetration to capture central, undisturbed air streams for highly representative micro-climate sampling.
  • Push-Button Configuration: Allows network address mapping, baud rate alignment, and parity configuration in the field via front panel inputs without requiring external software.
  • Industrial Environment Housing: Combines an IP65 polycarbonate electronic module chassis with a specialised sensor protection filter capsule.

Specifications

Part Number 8803116430
Model/Series RHT-DM-485-LCD (150mm Variant)
Core Operating Ranges Relative Humidity: 0.0% to 100.0% RH
Sensor Probe Temperature: −40.0°C to +100.0°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: 150mm length