Extech 433201-NIST- NIST Calibration Certificate Multi-Type Calibrator Thermometer 115V features: Source and measure 8 thermocouple type devices J, K, T, E, C, R, S, and N; Microprocessor assures maximum accuracy to 0.15% of reading over wide °C/°F ranges; Versatile thermometer measures over a wide temperature range; Displays output in terms of millivolts or °F/°C temperature based on built-in thermocouple tables; Bright 4 digit LED display built into adjustable cover; automatically shuts off when closed; Model 433201-NIST for 115V.