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Fluke 51-2 Single Input Digital Thermometer with K-Type Bead Probe 


  • 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
  • Measures J, K, T, and E-types of thermocouples
  • Readout in °C, °F, or Kelvin (K)
  • Splash and dust resistant case protected by impact absorbing holster
  • User-friendly front panel is easy to set up and operate
  • Sleep mode increases battery life; typical 1000-hour battery life
  • Battery door allows easy battery replacement without breaking the calibration seal
  • Optional ToolPak accessory allows the thermometer to hang from any metal object (with the rare earth magnet) or secure around a pipe (with hook-and-loop straps) for hands-free operation.
  • 3 year warranty


Temperature accuracy Above -100 C: J, K, T, E, and N-type: [0.05% + 0.3C]*
  R and S-type: [0.05% + 0.4C]*
Below -100 C: J, K, E, and N-types: [0.20% + 0.3C]*
  T-type: [0.50% + 0.3C]
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 C *
R and S-type: 0 C to 1767 C *
Temperature scale ITS-90
Applicable standards NIST-175
Display resolution 0.1 C, 0.1 K < 1000
1C, 1 K >=1000
Note *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, TV (pending)
Mechanical & General Specifications
Size 173 mm L x 86 mm W x 38 mm
Weight 400 g
Batteries 3 AA batteries; typical 1000-hour life
Recommended accessories
Fluke 80PK-22
Type K Thermocpole, Immersion Probe
Fluke 80PK-22 Immersion K Type Thermocouple Product Image
Fluke TPAK
ToolPak Magnetic Hanging Kit
Fluke TPAK Toolpak Magentic Hanging Kit Product Image
Fluke 51 II Digital Thermometer Product Image
In Stock