5pcs Ds18b20 18b20 Thermometer Temperature Sensor Unique 1-Wire interface requires only one port pin for communication Multidrop capability simplifies distributed temperature sensing applications User-definable, nonvolatile temperature alarm settings Alarm search command identifies and addresses devices whose temperature is outside of programmed limits (temperaturealarm condition) Applications include thermostatic controls, industrial systems, consumer products, thermometers, or any thermally sensitive system