Easy to use automatic field calibration ensures accurate readings. IP54-rated case provides splash and dust resistance. Intrinsically safe UL listed - certifi ed for Class I. Groups A, B, C, and D, Division 1. All models feature an ergonomic design, sealed silicone rubber keypad, IP54 splash - and dust resistant ABS/polycarbonate case, and a built-in tilt stand. They accept a wide variety of thermocouple probes with miniconnectors. Features automatic fi eld calibration-simply place the probe in a container packed with ice, fi ll with water, and press the "CAL" button; meter automatically recognizes the freezing point. Displays temperatures in ºF or ºC on large LCD. HOLD feature lets you freeze the display for later reading. Resolution is autoranging. Above 299.9º and below - 99.9º, thermometer automatically switched from standard 0.1º resolution to 1º resolution. Each thermometer is individually factory calibrated on a NIST-traceable calibrator. The thermometer has ±0.05 ºF conformity to NIST calibration tables.