The Extech TM20 is a waterproof Compact Temperature Indicator with a stainless steel probe. It includes 20 mm (0.78 in) stainless steel probe with 2.9 m (9.6 ft) cable. The TM20 measures temperature from -40°C to 70°C (-40°F to 158°F). Complete with foot stand, temperature sensor, and a CR2032 3 V button battery. CE certified.