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- High-precision industrial temperature sensor with aluminum alloy shell for harsh environments.
- Wide measurement range: -40°C to 120°C temperature and 0 to 99.9% RH humidity monitor.
- Uses RS485 Modbus communication protocol for reliable centralized monitoring systems.
- Waterproof environmental sensor with breathable, dust-proof design for extended service life.
- Superior accuracy of ±0.3°C for temperature and ±2% RH for humidity at 25°C.
- Fast response time with 3-second sampling cycle for real-time monitoring.
- Operates on 12-36V DC power supply for flexible installation options.
- Ideal for building automation, HVAC control, and climate monitoring applications.
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.
Shipping & Returns
Shipping & Returns
- All orders confirmed before 3 pm IST are shipped on the
same day, barring rare pickup delays on holidays or disturbances - Delivery time in Metro cities is 1-3 days, Others it is
3-7 days. It varies based on location, reliant on courier services - Return window: 7 days from receipt unless stated
otherwise. No refunds/replacements after - Returns only for non-working/damaged products are accepted
- Initiate return requests to our customer service team via Support ticket or contact us at +91-8123057137
- Refunds are processed within 3-4 working days post inspection and approval.
For more details, please check our Shipping and Return Policy
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Package Includes
1 x RS485 Temperature Humidity Sensor
Specifications
| 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 |