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Unique, flat-profile design, weight of a single ounce, and built-in pocket clip make it ideal to carry in a shirt pocket. Thermometer range is –58 to 572°F and –50 to 300°C. Place probe in any solution and enjoy digital resolution of 0.1° from –20 to 200° (1° otherwise). Accuracy is ±1.5°C. Ultra™ model accuracy is ±0.4°C at tested points. A HOLD button freezes a reading for later observation; another button switches from °F to °C. Safe for all lab tests tainless-steel and plastic construction (no glass or mercury) makes it the safest lab thermometer ever designed. Measure temperature in soil, cuvets, test tubes, food products, incubators, petroleum hydrocarbons, and virtually all lab tests. Probe guard snaps to handle to extend overall length to 10-3/4 inches. Records minimum/maximum reading At the touch of a button, memory recalls highest and lowest temperature readings over any time period. Large, bright LCD is 1/4-inch-high and 20 times more readable than eye-straining guesses at pointer or mercury positions. Readings are updated every second. Operates continuously for 1-1/2 years on a single, replaceable silver-oxide battery. To assure accuracy an individually serial-numbered Traceable® Certificate is provided from our ISO 17025 calibration laboratory accredited by A2LA. It indicates traceability to standards provided by NIST (National Institute of Standards and Technology). Unit is supplied with a protective case. Dimensions: stem length, 3-1/2 inches; stem diameter, 0.14 inches; overall length, 7 inches. Weight is 1 ounce. Replacement battery Cat. No. 1039.