RS485 Modbus Temperature and Humidity Sensor

RS485 Modbus Temperature and Humidity Sensor Product Overview 

The RS485 Modbus Temperature and Humidity Sensor is a fully digital, high-precision three-in-one meteorological sensor, integrating high-accuracy temperature, humidity, and atmospheric pressure detection capabilities. It can quickly and accurately measure atmospheric temperature, humidity, and pressure. The sensor has a built-in signal processing unit, supports RS485 output, and Modbus-RTU protocol, making it easy to integrate with various data acquisition systems, industrial control devices, and automation platforms. Its high-strength structural design ensures stable operation in harsh weather conditions. It is widely used in meteorology, marine, environmental monitoring, airports, ports, laboratories, agriculture, transportation, and other fields, providing users with reliable environmental data monitoring solutions.

What is RS485 and Modbus? 

- RS485: RS485 is a serial communication standard that uses differential signal transmission. It has strong anti-interference ability, long transmission distance (up to 1200 meters), and supports multi-point communication. It uses two signal lines (A+ and B-) for half-duplex communication, making it suitable for industrial environments and long-distance data transmission. RS485 supports multi-device connections (up to 32 nodes), commonly used for meteorological stations, industrial automation, and IoT devices.  

- Modbus: Modbus is an open communication protocol widely used for data exchange between industrial automation devices. Modbus-RTU is its serial communication version, using binary data format for transmission through interfaces such as RS485. It is simple, reliable, and easy to implement, supporting master-slave communication, allowing the master device (like a PLC or computer) to read data from or send commands to slave devices (like sensors). Modbus-RTU is widely used in sensor data collection and industrial control due to its compatibility and standardization.

RS485 Modbus Temperature and Humidity Sensor Features and Advantages 

- High Precision Measurement: Temperature accuracy ±0.5℃, humidity accuracy ±5%RH, pressure accuracy ±1.5hPa, providing reliable environmental data.  

- Integrated Design: Combines temperature, humidity, and pressure sensors, reducing equipment complexity, and simplifying installation and maintenance.  

- Wide Measurement Range: Temperature range: -40℃ to 80℃, Humidity: 0～100%RH, Pressure: 10～1200hPa, suitable for various applications.  

- Flexible Output: Supports RS485 interface and Modbus-RTU protocol, easy integration with PLCs, data loggers, and IoT systems.  

- Durability: High-strength design, operating temperature range of -40℃ to 80℃, humidity range 0～100%, suitable for harsh environments.  

- Low Power Consumption: DC 12V-24V power supply, low power consumption, suitable for solar-powered or long-term unattended remote monitoring.  

- Simple Wiring: Standard four-wire connection (Red - Positive power, Yellow - 485+, Blue - 485-, Black - Negative power), compatible with the company’s meteorological stations, easy installation.  

- Long-term Stability: Fully digital design with an internal signal processing unit, ensuring measurement accuracy and reliability for long-term operation.

RS485 Modbus Temperature and Humidity Sensor Technical Parameters 

- Wiring Method:

  - When used with the company's meteorological stations, connect the sensor line directly to the respective interface.

  - For standalone transmitter use, wiring method:

    - Red Line: Positive power

    - Yellow Line: 485+

    - Blue Line: 485-

    - Black Line: Negative power

RS485 Modbus Temperature and Humidity Sensor Application Scenarios and Value 

Application Scenarios: 

1. Meteorological Observation:

   - Role: Monitors atmospheric temperature, humidity, and pressure for weather forecasting, climate research, and disaster early warning.

   - Value: Provides high-precision data for storm, rainfall, and other weather predictions, ensuring public safety and agricultural production. 

2. Marine and Ports:

   - Role: Monitors atmospheric pressure and temperature and humidity for tidal prediction and vessel navigation.

   - Value: Enhances safety and efficiency in marine operations, optimizes port scheduling, and reduces weather-related impact. 

3. Environmental Monitoring:

   - Role: Analyzes environmental quality and pollutant dispersion trends based on temperature, humidity, and pressure data.

   - Value: Provides scientific evidence for environmental protection and pollution control, contributing to sustainable development. 

4. Aviation and Airports:

   - Role: Provides pressure data to calibrate altimeters and monitors temperature and humidity to assess runway conditions.

   - Value: Improves flight safety and takeoff/landing efficiency, reducing weather-related risks. 

5. Agriculture and Industry:

   - Role: Monitors temperature, humidity, and pressure for optimizing irrigation, greenhouse management, and industrial production.

   - Value: Increases crop yield and industrial efficiency, reduces energy consumption and resource waste. 

6. Laboratory Research:

   - Role: Provides high-precision data for meteorology, environmental, and materials science research.

   - Value: Promotes technological innovation and academic research by providing reliable experimental data. 

7. Traffic Management:

   - Role: Monitors weather conditions (e.g., pressure drop indicating heavy rain), optimizes traffic scheduling and safety management.

   - Value: Reduces traffic accidents and improves road and rail operation efficiency.

RS485 Modbus Temperature and Humidity Sensor Role and Value 

- Precise Decision-making: High-precision temperature, humidity, and pressure data provide scientific basis for meteorology, agriculture, aviation, and industry, optimizing decision-making processes.  

- Environmental Adaptability: Stable operation in extreme environments (-40℃ to 80℃, 0～100%RH), ideal for remote and harsh environments.  

- Data Integration: RS485 and Modbus-RTU protocols enable seamless connection with industrial automation systems and IoT platforms, enhancing data utilization efficiency.  

- Cost-effectiveness: Low power consumption and durable design reduce maintenance and operational costs, making it suitable for long-term unattended applications.  

- Disaster Early Warning: Monitoring pressure changes (e.g., rapid drop signaling storms) supports early warnings and reduces disaster losses.  

- Multi-field Application: From meteorological stations to smart agriculture, marine navigation to environmental monitoring, the sensor is widely applicable, improving efficiency and safety in various industries.

Why Choose NiuBoL's RS485 Modbus Temperature and Humidity Sensor? 

NiuBoL's RS485 Modbus Temperature and Humidity Sensor, with its high precision, integrated design, and robust environmental adaptability, is the ideal choice for meteorology, marine, environmental, aviation, agriculture, and transportation industries. The RS485 interface and Modbus-RTU protocol ensure compatibility with various systems, and the simple wiring and low power consumption design further enhance the ease of installation and use. Whether optimizing agricultural production, ensuring aviation safety, or supporting scientific research and smart city development, this sensor provides reliable, real-time data support, helping users achieve intelligent and sustainable development goals.

NBL-W-LBTH Atmospheric Temperature Humidity and pressure Sensor data sheet

NBL-W-LBTH-Atmosphere-temperature-humidity-and-pressure-sensor-instruction-manual-V4.0.pdf