1. Temperature and PT100 resistance values can be read, multifunctional. 2. Up to 247 modules can be cascaded by modifying the 485 address (for more than 16 modules, use R485 Repeaters). 3. High quality plastic material manufacturing ensuring maximum durability. 4. Temperature measurement range: A version 20 to and400 B Version: 20 to and220. It is recommended to select a small scale version within the measurement range. 5. Temperature measurement accuracy is 1 percent , if the temperature deviation is too , please recalibrate. Specification: Condition: Item Type: Temperature Sensor Module Function Description of PTA9B01 PT100 RS485 Sensor Module: Supply Voltage: DC 825V(12V is recommended) Working Current: 813mA MODBUS RTU protocol, 03 read instruction, 06 write instruction. Serial Port Baud Rate: 9600 (default), N, 8,1 Up to 247 modules can be cascaded by modifying the 485 address (please use R485 Repeaters for more than 16) Temperature and PT100 resistance values can be read Adaptive Sensor: PT100 3wire or 2wire sensor Temperature Measurement Range: A version 20 to and400 B Version: 20 to and220 It is recommended to select a small scale version within the measurement range. Temperature measurement accuracy: 1 percent , if the temperature deviation is too , please recalibrate Material:plastic colour:As shown Package Contents: 1 x Thermal Resistance Sensor Only the above package content, other products are not included. Note: Light 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.