ITEM NAME:1x Waterproof DS18b20 Digital Thermal probe temperature sensor Arduino New WOU.Waterproof Sensor DS18B20. The probe the temperature sensor DS18B20 original chip. Storage temperature range: -55Â °C to +125Â °C (-67Â °F to +257Â °F). We want to make sure you are happy with our item. Goods without RMA number will NOT be accepted.