When it's necessary to know the highest and lowest temperatures measured during a certain process, HANNA® has incorporated a dual-level LCD into these portable thermocouple thermometers. Along with the current reading, the highest and lowest temperature in the series can be assessed at a glance.These digital thermocouple thermometers can read with a resolution of 0.1 in the range of -149.9 to 999.9°C or -24.9 to 999.9°F. The thermometer is equipped with a HOLD function that freezes the current reading on the display. A °C/°F button will change between Celsius and Fahrenheit modes. Battery level is shown at startup and low battery warning with Battery Error Prevention System (BEPS) assure long periods of trouble-free use between battery changes. For these portable thermocouple thermometers, HANNA® manufactures several thermocouple probes for different applications (HI 766 series). Hanna #: HI 93531. Range: -200.0 to 999.9°C; 1000 to 1371°C; -328.0 to 999.9°F; 1000 to 2500°F Resolution: 0.1°C (-149.9 to 999.9°C); 0.2°C (-200.0 to -150.0°C); 1°C (outside); 0.1°F (-24.9 to 999.9°F); 0.2°F (-249.9 to -25.0°F); 0.3°F (-328.0 to 250.0°F); 1°F (outside) Accuracy: ±0.5°C (-100.0 to 999.9°C); ±1°C (outside); ±1°F (-148.0 to 999.9°F); ±1.5° (outside); (for 1 year, excluding probe error) Probe: K-thermocouple type, HI 766 series (not included) Battery Type / Life: 3 x 1.5V AA / approx. 500 hours of continuous use (with backlight off); Auto-Off after 60 minutes of non-use (can be disabled).Environment: -10 to 50°C (14 to 122°F); RH max 100% Dimensions: 150 x 80 x 36 mm (5.9 x 3.1 x 1.4") Weight: 235 g (8.3 oz.) HI 93531 is supplied with batteries, protective case and instructions.