Call 01642 931329 for Orders & Advice

Fluke 51 II Single-Input Thermocouple Digital Thermometer

Fluke 51 II Single-Input Thermocouple Digital Thermometer
MPN: 1281142

Free UK Delivery On Orders Over £40
  • Measure temperature levels with laboratory-grade accuracy
  • Works with four different types of thermocouples
  • Robust, reliable dust/splashproof design for use in demanding environments

Was: £282.00
You Save: £79.62
£202.38 Incl. VAT £242.86
Over 10 In Stock
Members earn 404 points

Do you have a question or found it cheaper? Contact us


Fluke 51 II Single-Input Thermocouple Digital Thermometer Details

The Fluke 51 II is a single-input digital thermometer that is compatible with J, K, T and E type thermocouple probes.

With ultra-fast response and laboratory accuracy of 0.05% + 0.3°C, Fluke's 51 II is a must for professional temperature measurements in practically any application.

The overall measurement range of the Fluke 51 II varies depending on the probe type used. Measurements can be output in Kelvin, Celsius or Fahrenheit and the following measurement ranges are possible for each different type of thermocouple:

  • J Type: -210°C to 1200°C (-346°F to 2192°F)
  • K Type: -200°C to 1372°C (-328°F to 2501°F)
  • T Type: -250°C to 400°C (-418°F to 752°F)
  • E Type: -150°C to 1000°C (-238°F to 1832°F)

The Fluke 51 II digital thermometer can be used in any environment thanks to its backlit LCD screen and splash/dust resistant casing (ideal for use in industrial conditions).

As well as individual measurements the 51 II can also calculate and display the MAX, MIN and AVG values taken over a period of time. A relative time clock facility built into the thermometer also provides a time reference for major events, making it easier to determine problems.

Fluke 51 II Thermometer Key Features

  • Single input digital thermometer suitable for use with type J, K, T and E thermocouple probes
  • Laboratory-grade accuracy of 0.05% + 0.3°C ensures you always get accurate results
  • Select temperature units - choose between Celsius, Fahrenheit and Kelvin
  • Electronic offset function allows compensation of thermocouple errors to maximise overall accuracy
  • Backlit LCD screen
  • Record the minimum, maximum and average values taken over a periond of time with MIN/MAX/AVG modes
  • Sleep mode to help increase battery life (ideal for if the tester is accidental left switched on)
  • Battery door allows access to the batteries without breaking the calibration seal

What's Included?

  • Fluke 51 II Digital Thermometer
  • Impact Absorbing Holster
  • One-Bead Probe Thermocouple (Type K)

Upgrade to Other Models in the Fluke 50 II Series

The Fluke 51 II is actually the entry-level model in an entire series of digital thermometers from Fluke. This table outlines the differences.

Model Number 51 II 52 II 53 II 54 II
Thermocouple Types J, K, T and E J, K, T and E J, K, T, E, N, R and S J, K, T, E, N, R and S
Number of Inputs 1 2 1 2
Time Stamp Relative time Relative Time Time of day Time of day
Splash/Dust Resistant Yes Yes Yes Yes
Dual Display with Backlight Yes Yes Yes Yes
MIN/MAX/AVG Recording Yes Yes Yes Yes
T1-T2 (True Differential) - - Yes Yes
Datalogging (Up to 500 Points) - - Yes Yes
IR Data Port for Interface to PC - - Yes Yes
Compatible with Optional FlukeView Software - - Yes Yes
Accessories (12)

Fluke C50 Meter Case
Was: £35.00
You Save: £5.76
£29.24 Incl. VAT £35.09
Fluke 700TC2 Thermocouple Plug Set (5 Types)
Was: £97.00
You Save: £10.91
£86.09 Incl. VAT £103.31
Fluke 80PK-8 Small Pipe Clamp Temperature Probe - Type K
Was: £160.00
You Save: £19.05
£140.95 Incl. VAT £169.14
Fluke 80PK-27 SureGrip Industrial Type K Surface Temperature Probe
Was: £343.00
You Save: £41.05
£301.95 Incl. VAT £362.34
Fluke C101 Hard Case
Fluke C101 Hard Case SKU:FLUCA12
Was: £56.00
You Save: £9.22
£46.78 Incl. VAT £56.14
Fluke C510 Leather Meter Case
Was: £69.00
You Save: £7.76
£61.24 Incl. VAT £73.49
Fluke C550 Large-Size Tool Bag
Was: £111.00
You Save: £18.28
£92.72 Incl. VAT £111.26
Fluke CXT170 Extreme Hard Carrying Case
Was: £164.00
You Save: £27.01
£136.99 Incl. VAT £164.39
Fluke TPAK ToolPak Meter Hanging Kit
Was: £35.00
You Save: £5.76
£29.24 Incl. VAT £35.09
Fluke 80PK-22 SureGrip Immersion Temperature Probe
Was: £93.00
You Save: £15.32
£77.68 Incl. VAT £93.22
Fluke 80PK-24 SureGrip Type K Air Temperature Probe
Was: £119.00
You Save: £19.60
£99.40 Incl. VAT £119.28
Fluke 80PK-25 SureGrip Type K Piercing Temperature Probe
Was: £106.00
You Save: £15.00
£91.00 Incl. VAT £109.20
Technical Specs

Part Code: 1281142

Fluke 50 II Series Technical Specifications

Temperature Accuracy Above 100°C (type J, K, T, E and N): ±(0.05% + 0.3°C)*
R and S type: ±(0.05% + 0.4°C)
Below 100°C (type J, K, E and N: ±(0.20% + 0.3°C)*
T-type: ±(0.50% + 0.3°C)
Temperature Range J-Type: -210 to 1200°C
K-Type: -200 to 1372°C
T Type: -250 to 400°C
E-Type: -150 to 1000°C
N-Type: -200 to 1300°C*
R and S Type: 0 to 1767°C*
Temperature Scale ITS-90
Applicable Standards NIST-175
Display Resolution 0.1°C, 0.1K < 1000
1°C, 1K > 1000
*Note: only the Fluke 53 and 54 II thermometers are suitable for use with N, R and S thermocouples
Environmental Specifications
Operating Temperature -10 to 50°C
Storage Temperature -40 to 60°C
Humidity (Without Condensation) 0 to 90%: 0 to 35°C
0 to 70%: 0 to 50°C
Additional Specifications
Overvoltage Category CSA C22.2 No 1010.1 1992, EN 61010 Amendments 1, 2
Agency Approvals CE, CSA, TUV (pending)
Size 173 x 86 x 38mm (L x W x H)
Weight 400g
Battery Type 3 x AA
Battery Life Typical 1000 hour

We'd really appreciate it if you'd review this product

Why not leave a review of this product? Reviews help us improve our service for customers looking for a product to make a decision.

No reviews have been found

Write Your Own Review

How do you rate this product? Required *