Features: Experience precise temperature control with our 8ch DS18B20 RS485 Modbus RTU Temperature Control Sensor Remote Digital Module. Our module supports MODBUS RTU command codes 03 and 06, allowing you to easily modify temperature settings. By modifying the 485 address, support up to 247 modules can be cascaded for use (if there are more than 16, please use R485 repeaters) Using DS18B20 temperature and humidity sensors, up to 8 DS18B20 temperature sensors can be connected simultaneously For industrial system, consumer product, and thermally sensitive system, this module is perfect for engineers and DIY enthusiasts alike. Specifications: Power supply voltage: 6-24V Working current: 8-13MA (related to the number of external DS18B20) MODBUS RTU command supports 03 06 function code The measurable temperature is -55 to+125 (-67 to+257 ) Size: approx 70x46x18MM/2.75x1.81x0.71in Weight: 40g Note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment. Package includes: 1PC RS485 DS18B20 Sensor Module