No worries about the protocol, easy adaptation,Can be directly connected to the existing ModBus system without worrying about protocol matching issues. 16-bit ADC,Resolution up to 0.1℃. High protection isolation,Support RS485 isolation, power supply isolation (2000V), and power supply reverse connection protection;Lightning-protection and surge protection, high protection electrical isolation. Soft and hard dual watchdog,Reliable and stable operation without crashes, industrial-grade chips can operate stably and reliably for a long time. Real-time temperature display,Built-in OLED screen display, real-time temperature status is clear at a glance. Hign-concerned Chemical:None Protocol:Modbus TCP/Modbus RTU Operating Voltage:DC8-28V Communication Interface:RJ45/RS485 Type:A:4-channel Colour:As Shown Material:Plastic Package Contents: 1 * Temperature acquisition sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.