Dwyer CA10 is a portable digital thermometer and calibrator. It features a 3-digit LCD display, thermocouple input, and selectable temperature units (°C or °F). The CA10 offers high accuracy of ±(0.1% rdg + 1°C) on -40°C to 1350°C and ±(0.1% rdg + 2°F) on -40°F to 2000°F. It allows for thermocouple calibration and provides a MAX mode to record and update the highest temperature value. The CA10 is powered by a 9-volt battery and has a battery life of approximately 200 hours.