DFRobot RS485 Temperature & Humidity Sensor Module
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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.
1 x RS485 Temperature Humidity Sensor
| Temperature Measurement Range | -40 ~ 120? |
| Humidity Measurement Range | 0 ~ 99.9%RH |
| Temperature Accuracy | ± 0.3°C (25°C) |
| Humidity Accuracy | ± 2%RH (25?) |
| Sampling Cycle Period | 3 sec |
| Power Supply Voltage | 12 ~ 36V DC |
| Product Size | 200mm (L) × 15.7mm (D) / 7.87×0.62” |
| Output Signal | RS485 |
| Communication Protocol | Standard MODBUS RTU |
| Baud Rate | 9600 (default) |
| Display Resolution | Temperature: 0.1?; Humidity: 1%RH |
| Product Net Weight | 110.0g |
| Sensitivity Attenuation | Temperature?0.1?/year; Humidity?0.5%RH/year |
| Wire Sequence | Yellow: RS485 A; Red: Power Input; Black: GND; White: RS485 B |
This product comes with a 1-year manufacturer warranty from the date of purchase, covering manufacturing defects only.
The product shows signs of physical damage, mishandling, exposure to water/moisture, fire, natural calamities, unauthorized repairs, improper storage near heat or direct sunlight, or alteration in any way.
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