RS485 Temperature Humidity Sensor

This industrial-grade RS485 temperature and humidity sensor features a high-precision digital transducer in a rugged aluminium alloy housing. With a wide measurement range and Modbus RTU communication, it's designed for integration into building automation, HVAC systems, and environmental monitoring networks.

The probe uses a breathable, dust-proof design that protects the internal circuitry while allowing accurate ambient readings. The waterproof, heat-resistant construction makes it suitable for harsh environments including greenhouses, cold rooms, and outdoor installations.

Key Features

• RS485 Output – Standard Modbus RTU protocol for easy integration with PLCs, HMIs, and host systems
• Wide Temperature Range – Measures −40 to +120 °C with ±0.3 °C accuracy at 25 °C
• Humidity Sensing – 0–99.9% RH with ±2% RH accuracy at 25 °C
• Industrial Housing – Aluminium alloy shell, waterproof and heat resistant
• Low Drift – Temperature drift <0.1 °C/year, humidity drift <0.5% RH/year
• Compact Probe – 200 mm (L) × 15.7 mm (D)

Specifications

• Temperature Range – −40 to +120 °C
• Temperature Accuracy – ±0.3 °C (at 25 °C)
• Temperature Resolution – 0.1 °C
• Humidity Range – 0–99.9% RH
• Humidity Accuracy – ±2% RH (at 25 °C)
• Humidity Resolution – 1% RH
• Sampling Period – 3 seconds
• Power Supply – 12–36 V DC
• Output Signal – RS485
• Protocol – Modbus RTU
• Baud Rate – 9600 (default)
• Dimensions – 200 × 15.7 mm
• Weight – 110 g

Wiring

• Yellow – RS485 A
• Red – Power input (12–36 V DC)
• Black – GND
• White – RS485 B

Ideal For

• HVAC and building automation systems
• Greenhouse and cold room monitoring
• Museum and hotel climate control
• Industrial environmental monitoring

Package Contents

• 1× RS485 Temperature & Humidity Sensor