Power: DC1 .5V LR44 button battery；Measuring range: -50°C~ + 300°C (-58°F~+ 572°F)；Resolution: 0.1(≥400°F), 0.1 at others；Accuracy:±1°C(-20°C~ + 80°C);±5°C for other range

Power supply: Solar battery and LR44 battery; Temperature measuring range: -50°C~ + 150°C(-58°F~199°F); Resolution: 0.1; Accuracy:±1°C (-20°C~+ 80°C),  ±2°C (-50°C~+20°C, 80°C~120°C) , ±3°C (120°C~150°C)

Power supply: two button batteries (LR44, 1.5V)；Temperature measuring range: -50°C~ 70°C；Resolution: 0.1 (TPM-10F), 1 (TPM-10AE)；Accuracy:±1°C；Sensor: NTC

Power: DC1 .5V 7# alkaline battery (optional)；Measuring range: -50°C~ + 300°C (-58°F~+572°F)；Resolution: 0.1(-19.9°C~199.9°C), 1 at others；    Accuracy:±1°C(-20°C~+80°C);±5°C at others

Power supply: solar battery panel；Temperature measuring range: -50°C~ 150°C (when temperature > 80°C or <-20°C, need to custom sensor wire)；Resolution: 0.1°C；Accuracy: 士1°C； Sensor: NTC；Operation environment: ilumination level2 100Lux, humidity:5%~ 85%RH, temperature: -10°C~45°C

Power supply: DC1 .5V one 7# Alkaline battery(optional)；Indoor temperature -30°C~ + 50°C；Outdoor temperature -50°C~ + 70°C；Relative humidity: 20%~90% RH；Resolution: Temperature: 0.1°C ；Humidity: 1；Accuracy: Temperature:±1°C；Humidity:±5%RH

Power supply: DC1. 5V one 7# Alkaline battery (optional)；Indoor temperature -30°C~ + 50°C(-22°F~+ 122°F）；Outdoor temperature -50°C~+ 70°C (-58°F~+ 158°F)；Resolution: 0.1°C；Accuracy:±1°C

Universal Glass Heaters are designed for superb performance and reliability. Constructed of high quality glass with end seals of high temperature molded silicone.

The purpose of the defrost drain heater is to transfer heat from the defrost heater via conduction through heater probe that melts ice in the drain before melting ice on the evaporator.