DROK Waterproof Temperature Sensor DS18B20-55 to +125 1 Meter/39.37" Digital Temperature Probe Thermometer Wide temperature measuring range: -55 to +125 (-67to +257) Adopts ds18b20 temperature sensor chip, high accuracy and sensitive Each pin of the chip is separated by heat Shrinkable pipe and sealed by adhesive inside, avoid short circuit and waterproof With 650mm stainless steel housing and 1 meter/39 37'' thermal cable Ideal choice for environment, Lab, refrigerator, car, Green house temperature monitoring