These contact thermometers offer fast response and laboratory accuracy (0.05% + 0.3°C) in a rugged, handheld test tool. User-friendly front panel is easy to set up and operate. Large backlit dual display shows any combination of T1, T2 (52 and 54 only), T1-T2 (52 and 54 only), plus MIN, MAX, or AVG. Relative time clock on MIN, MAX, and AVG provides a time reference for major events. Electronic offset function allows compensation of thermocouple errors to maximize overall accuracy. Each function is push-button activated and fully annunciated in the easy-to-read LCD. Supports J, K, T, and E-types thermocouples. Temperature readout in °C, °F, or Kelvin (K). Sleep mode increases battery life (typically 1000 hours). Battery door allows easy battery replacement without breaking the calibration seal. Splash and dust-resistant case is protected by impact absorbing holster. Models 53 and 54 include all the features listed above plus: data logging of up to 500 points of data with user-adjustable recording interval; additional thermocouple types R, S, and N (for a total of 7 different types); real time clock captures the exact time of day when events occur; recall function allows logged data to be easily reviewed on the meter display; IR communication port allows data to be exported to optional FlukeView Forms® temperature PC software for further analysis and graphing. All Models come with 80PK1 bead thermocouple(s) and (3) AA batteries.