This is a Waterproof DS18B20 Temperature Sensor/Thermometer. The probe uses original DS18B20 temperature sensor chip. It is waterproof, moisture-proof and anti-rust with the high-quality stainless steel tube encapsulated. No other components, unique single bus interface. The probe adopts DS18B20 temperature sensor chip. Its probe is made of stainless steel which is waterproof, moisture-proof and anti-rust. Stainless steel housing of 6 * 50mm and Lead length of 100cm. Please note that the temperature probe requires no external components and has single bus interface. High quality stainless steel tube encapsulation waterproof moisture-proof prevent rust.