Digital Infrared Temperature Sensor, 0-1300℃, RS485 Output

RS485 output offers several key benefits:

• Strong noise immunity – differential signaling is ideal for industrial environments;
• Long-distance transmission – up to 1200 meters without signal amplification;
• Multi-drop communication – up to 32 devices can share a single bus.

The sensor typically supports Modbus RTU protocol, allowing direct connection to PLCs, DCS, HMIs, or SCADA systems for real-time temperature monitoring and data acquisition.

The specified accuracy of ±1% of reading means that the measurement error is within one percent of the actual temperature value; for example, at 1000℃, the maximum deviation is ±10℃. To achieve and maintain this level of accuracy, users should ensure that the sensor’s optical path remains clean, as dust or oil on the lens can significantly affect infrared transmission. It is also crucial to set the correct emissivity according to the surface material being measured, since emissivity values vary widely between different substances (for instance, oxidized iron ≈ 0.9, polished metal ≈ 0.3). Additionally, minimizing reflections from nearby high-temperature or reflective surfaces helps avoid measurement distortion, and periodic calibration of the sensor under stable reference conditions further guarantees consistent accuracy over long-term use.

The sensor uses the Modbus RTU communication protocol over RS485, allowing for reliable and standardized data exchange with industrial controllers. Typical communication settings include a baud rate of 9600 or 19200 bps, 8 data bits, 1 stop bit, and optional parity (None or Even), with a device address range from 1 to 247. These parameters can be configured and tested through any standard serial communication software or a dedicated configuration tool provided by the manufacturer. Once properly connected, users can read real-time temperature values, device status, and alarm parameters through predefined Modbus registers. A Modbus register map or command set document is usually supplied to guide users in integrating the sensor into PLCs, DCS, or SCADA systems for seamless data acquisition and process control.