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RS485 Modbus Waterproof Temperature & Humidity Sensor Probe (Industrial Grade)

RS485 Modbus Waterproof Temperature & Humidity Sensor Probe (Industrial Grade)

PriceFrom AU$50.89
Excluding Sales Tax
The CWT-THxxS RS485 Temperature & Humidity Sensor Probe is a compact, low-power, industrial sensor designed for accurate environmental monitoring in harsh or humid environments. Featuring Modbus RTU communication, a wide DC power range, and a waterproof probe design, it integrates seamlessly with PLCs, RTUs, gateways, and SCADA systems.
This sensor is ideal for industrial automation, agriculture, greenhouses, HVAC systems, equipment rooms, and outdoor enclosures where reliable temperature and humidity data is required.
Key Features
  • RS485 Communication (Modbus RTU) – Industrial standard protocol
  • Wide Power Supply Range – DC 5V to DC 24V
  • Waterproof Probe Design – Suitable for humid and harsh environments
  • Low Power Consumption – < 0.1 W
  • Long Communication Distance – Up to 800 m over RS485
  • High Resolution Digital Output – 0.1 °C / 0.1 %RH
  • Custom Cable Length Available

Temperature

  • Range: –30 °C to +80 °C

  • Accuracy: ±0.5 °C

  • Resolution: 0.1 °C

Humidity

  • Range: 0–100 %RH

  • Accuracy: ±5 %RH

  • Resolution: 0.1 %RH

Electrical Specifications

Parameter Specification
Power Supply DC 5–24 V
Power Consumption < 0.1 W
Output Signal RS485
Protocol Modbus RTU
Communication Distance Up to 800 m
Default Address 1
Default Baud Rate 4800 bps
Data Format N, 8, 1
Default Cable Length 0.5 m (customisable)

RS485 Wiring

Cable Colour Function
Brown Power + (DC 5–30 V)
Black Power –
Yellow / Green RS485 A+
Blue RS485 B–

Modbus Communication Notes

  • Protocol: Modbus RTU

  • Function Code: 03H (Read Holding Registers)

  • Temperature Data:

    • Negative temperatures are transmitted using two’s complement

    • Example:

      • FF9F = –97 → –9.7 °C

  • Humidity Data Example:

    • 01E6 = 486 → 48.6 %RH

Typical Applications

  • Industrial automation & control panels

  • Greenhouses & agriculture monitoring

  • HVAC systems

  • Data centres & equipment rooms

  • Weather stations

  • Smart buildings & infrastructure

  • Environmental monitoring systems

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