DFRobot RS485 Temperature & Humidity Sensor Module

The RS485 Temperature & Humidity Sensor (SEN0438) is a high-quality industrial temperature sensor designed for precise environmental monitoring in demanding conditions.

This device combines a high-quality digital integrated transducer with reliable digital processing circuits to convert temperature and humidity readings into RS485 signals.

The sensor features exceptional measurement capabilities with temperature detection from -40°C to 120°C and humidity detection from 0 to 99.9% RH. Its robust aluminum alloy shell provides excellent waterproof and heat-resistant properties, making this HVAC humidity monitor perfect for harsh environments.

What sets this RS485 Modbus sensor apart is its remarkable long-term stability, low latency, high resistance to chemical pollution, and superior repeatability. With a temperature accuracy of ±0.3°C and humidity accuracy of ±2% RH (at 25°C), this waterproof environmental sensor delivers reliable data for critical applications.

The standard MODBUS RTU protocol ensures seamless integration with existing systems, while the 3-second sampling cycle provides near real-time monitoring capabilities.

This versatile sensor is an ideal solution for building automation, climate and HVAC automatic control, climatology stations in museums and hotels, closed-loop control of HVAC systems, and many other applications requiring precise environmental monitoring.

Features

• Temperature measurement range: -40°C to 120°C with ±0.3°C accuracy at 25°C.
• Humidity measurement range: 0 to 99.9% RH with ±2% RH accuracy at 25°C.
• Sampling cycle period: 3 seconds for responsive monitoring.
• Power supply voltage: 12-36V DC for flexible installation.
• Output signal: RS485 with standard MODBUS RTU protocol.
• Default baud rate: 9600 for reliable communication.
• Display resolution: Temperature 0.1°C, Humidity 1% RH.
• Product dimensions: 200mm length × 15.7mm diameter.
• Net weight: 110 grams for easy handling and installation.