Power supply voltage: DC 8-25V (12V recommended), Working current: 8-13MA.MODBUS RTU protocol, 03 read , 06 write . Serial port rate: 9600 (minimum), N, 8, 1.By modifying the 485 address, up to 247 modules can be cascaded for use (if more than 16, use R485 repeaters)Can read temperature and PT100 resistance value, Adapted sensor: PT100 3-wire or 2-wire sensorTemperature measurement range: A version -20 to +400, Temperature measurement accuracy: 1%, if the temperature deviation is too , recalibrateProduct name: PT100 waterproof and high temperature resistant probeProbe diameter: 6.5MMProbe length: 30MMCable length: 0.5 metersMeasuring temperature range: -200-550 secondssize: 60 x 30 x 16MM Material:abs+metalcolour:greenPackage Contents:1 x PTA9B01 PT100 RS485 Acquisition module1 x TB445-50cm PT100 probe1 x TB444-white shellOnly 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.