Dwyer TE-SNW-D is a durable and reliable Weather Resistant Surface Temperature Sensor. It operates in a temperature range of -32 to 240°F (-35.5 to 115.5°C) and has high accuracy: ±0.22°C @ 25°C (±-0.4°F @ 77°F) for the thermistor temperature sensor and DIN Class A ±0.15°C @ 0°C (±0.28°F @ 32°F) for the RTD temperature sensor. Made from UL 94 V-0 polycarbonate plastic, it meets NEMA 3R standards. Sensor curves can be found in the Resistance vs. Temperature Table.