Features: 1.ADAPTABLE SENSOR: B3950 10K 1% NTC thermistor, up to 7 NTC sensors can be connected at the same time. 2.1% ACCURACY: The module resistance value accuracy is 1%, the theoretical temperature measurement range is ?273 to 200 , the final temperature measurement accuracy and temperature measurement range is determined by the NTC thermistor. 3.OPERATING CURRENT: MODBUS RTU command supports 03 06 function codes, 8 to 15 MA operating current, 6 to 24 V supply voltage. 4.UP TO 247 MODULES: Up to 247 modules can be used in cascade by modifying the 485 address (for more than 16 modules, please use R485 repeater). 5.PCB MATERIAL: NT18B07 module is made of PCB material, which will not be deformed after long time use and thus ensure the stability for a long time. specification:Item Type: 7 Channel RS485 NTC Temperature Measurement Material: PCB Supply Voltage: 6-24V Operating Vurrent: 8-15MA (Related to the Number of External NTC) PackageList:1 x 7ChannelRS485NTCTemperatureMeasurement NoteThis module does not come with an NTC sensor, the NTC sensor needs to be purchased separately ( B3950 10K 1%)