Sonoff DIY DS18B20 Waterproof Temperature Sensor – Operating Temperature Range: -55 C to +125 C – 100 cm Cable – Super Durability – Long Lifespan – Easy to install – Stainless Steel Tube – Black

【Power Applicability】The waterproof temperature sensor is available for SONOFF TH10 and TH16 to detect and measure the temperature.
【Wider Measuring Range】Measuring range from -55℃ to +125℃ to enable use in a wider scope of applications. Easy to install.
【Super-durability & Long-lifespan】The stainless steel probe is water-resistant, anti-corrosion, and rust-proof which can be used in a moist environment.
【Enough Cable Length】The 50cm cable allows you to connect the device which is farther from the switch.