Relative Humidity Sensor With Modbus Output

Model: RH&AT-MB | RH/AT/P Make: SEVEN SENSOR

Key Highlights

    *The SEVEN Relative Humidity Sensor is specifically designed to measure relative humidity and ambient temperature, with an optional pressure measurement feature. *Measurand: Relative Humidity (%) *Sensor Type: Capacitive/Resistive/Hygroscopic *Signal Output: Modbus RTU (RS485) *Supplied With: Mounting hardware, cables, user manual, configuration software

Category: Temperature Sensor

A Relative Humidity Sensor with Modbus Output is a type of sensor used to measure the relative humidity (RH) in the air and communicate the measurement data using the Modbus protocol, which is a widely used standard in industrial and automation systems for communication between devices.

Key Components and Operation:

  1. Relative Humidity Measurement:
    • Relative Humidity (RH) refers to the amount of water vapor present in the air compared to the maximum amount the air can hold at a given temperature. It is expressed as a percentage from 0% (dry air) to 100% (saturated air).
    • The sensor works by detecting changes in the moisture content of the air and converting this information into an electrical signal. This signal is then processed to provide a precise RH value.
  2. Modbus Output:
    • Modbus RTU (Remote Terminal Unit) is a standard communication protocol that allows the sensor to transmit data to a controller, typically a PLC (Programmable Logic Controller) or SCADA (Supervisory Control and Data Acquisition) system, via an RS-485 serial connection.
    • The sensor sends the RH data in a format (usually a 16-bit register value) that can be read by the system in real-time. This allows for easy integration into industrial or commercial monitoring systems.

How It Works:

  • The sensor element in the humidity sensor (often capacitive, resistive, or hygroscopic) detects changes in moisture in the air.
  • The sensor outputs a signal that represents the relative humidity value.
  • Using the Modbus RTU protocol over an RS-485 bus, this data is transmitted to a controller or central system for monitoring and control.
  • In a typical setup, the sensor is connected to a Modbus-compatible device (e.g., PLC, SCADA), which can then process, log, and take actions based on the humidity data (e.g., activating dehumidifiers or humidifiers).

Application


*HVAC Systems *Industrial Environments *Agricultural Environments *Laboratories *Museums & Archives

Feature


*Modbus RTU Output *Wide Measurement Range *High Accuracy *Compact Design *Low Power Consumption *Easy Calibration

Related Products