Key features

Single Input digital thermometer for lab, QA, process calibration, food safety and HVAC

Measures J, K, T, and E-type thermocouples

Presents results in °C, °F, or Kelvin (K) on a large backlit display

Includes a relative time clock on MIN, MAX, and AVG to provide a time reference for major events

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.

Other useful features:

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

Specifications

Temperature accuracy Above -100°C J, K, T, E, and N-type: ±[0.05% + 0.3°C]1

  R and S-type: ±[0.05% + 0.4°C]1

Below -100°C J, K, E, and N-types: ±[0.20% + 0.3°C]1

  T-type: ±[0.50% + 0.3°C]

Temperature 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

N-type -200°C to 1300°C1

R and S-type 0°C to 1767°C1

Temperature scale ITS-90

Applicable standards NIST-175

Display resolution 0.1°C, 0.1 K < 1000

1°C, 1 K ≥ 1000

1. Only the Fluke Models 53 II B and 54 II Bthermometers are capable of measuring N, R, and S-type thermocouples.

Environmental Specifications

Operating temperature -10°C to 50°C

Storage temperature -40°C to 60°C

Humidity (without condensation) 0% to 90%; 0°C to 35°C

0% to 70%; 0°C to 50°C

Safety Specifications

Overvoltage category CSA C22.2 No. 1010.1 1992; EN 61010 Amendments 1,2

Agency approvals CE, CSA, TÜV (pending)

Mechanical and General Specifications

Size (L x W x D) 173 x 86 x 38 mm