The Testo 103 is a waterproof folding thermometer designed for handy, practical temperature measurements, particularly suited to core temperature measurement thanks to its robust metal folding joint and long, stable measurement probe. Its compact 4.33-inch size folds away for easy pocket storage.

The thermometer features IP55 protection, allowing use under various conditions and easy cleaning under running water. The rubber-coated surface ensures non-slip handling, even with wet hands. A large, illuminated display enables error-free viewing of measurement data in poor lighting conditions.

With a temperature range of -58 to 527°F and accuracy as tight as ±0.9°F in the critical -22 to 212°F range, the Testo 103 delivers reliable performance for food safety, laboratory, and industrial applications. The long 300-hour battery life from two 3V button cells ensures extended field use without frequent battery changes.