Fluke 51 II Handheld Digital Probe Thermometer

Brand: Fluke Corporation

The Fluke 51 II single input digital thermometer delivers fast response with laboratory accuracy (0.05% + 0.3°C).

You can use the 51 II to measure contact temperature on motors, insulation, breakers, pipes, corroded connections, liquids, and wires with industrial standard J, K, T, or E-type thermocouple temperature sensors.

The user friendly-front panel and large, backlit display make it easy to view results.

And the sleep mode feature preserves battery life to give you a typical thousand hours of operation.
  • Easy-to-access battery door that allows replacing the battery without breaking the calibration seal
  • Comes with splash- and dust-resistant case protected by an impact-absorbing holster and a three-year warranty
  • Powered by three, standard AA batteries -30-
  • Includes an electronic offset function that compensates for thermocouple errors to maximize overall accuracy
  • Handles temperatures up to 900°C (1600°F)
  • Provides a user-friendly front panel that is easy to set up and operate
  • Offers sleep mode to increase battery life; 1000-hour battery life typical
  • Offers optional ToolPak accessory to hang the thermometer from any metal object (with the rare earth magnet) or secure around a pipe (with hook-and-loop straps) for hands-free operation


Temperature Range

  • J-Type: -210° C to 1200° C
  • K-Type: -200° C to 1372° C
  • T-Type: -250° C to 400° C
  • E-Type: -150° C to 1000° C

Temperature Scale

  • ITS-90

Applicable Standards

  • NIST-175

Operating Temperature

  • -10° C to 50° C

Agency Approvals

  • CE
  • CSA
  • TÜV


  • 3 AA batteries, typical 1000-hour life
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