Fluke 51 II Single-Input Thermocouple Digital Thermometer

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.

Fluke 50 Series II Digital Contact Thermometers

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

Fluke 50 II Series Technical Specifications

Environmental 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)
Temperature Accuracy	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
Operating Temperature	-10 to 50°C
Storage Temperature	-40 to 60°C
Humidity (Without Condensation)	0 to 90%: 0 to 35°C
Humidity (Without Condensation)	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