The Extech 39240 waterproof pocket thermometer is designed for measuring temperature in frozen solids and liquids. Its waterproof housing allows the entire meter to be completely submerged in water, making it ideal for field applications where exposure to moisture is common. At just 0.7 ounces, it is easily carried in a pocket, and its protective plastic cover ensures safe storage and transport.

The 2.75-inch (70mm) stainless steel stem provides durability and fast thermal response. The meter is switchable between °F and °C and measures temperatures from -40 to 392°F (-40 to 200°C). The digital display offers 0.1° resolution for precise readings. A MAX/MIN function allows users to recall high and low temperatures recorded over a period, while Data Hold freezes the current reading on the display.

Additional features include auto power off to conserve battery life. The Extech 39240 comes complete with an LR44 button battery and a protective cover, providing everything needed for immediate use in food processing, laboratory, and field environments where a compact, waterproof thermometer is essential.