Fluke Calibration

7103 Micro-Bath Thermometer Calibrators

Portable calibrator with extremely stable temperature baths

Starting At
$10,971.00 CAD
Normally ships in 1-2 Weeks

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Wherever you go with your Micro-Bath, you can count on its performance. Each model is stable to +/- 0.03°C or better, depending on the fluid you use. Uniformity is +/- 0.02°C or better for low uncertainties using a reference thermometer. Display accuracy has been improved to +/- 0.25°C for quick calibrations without a reference thermometer. In short, you get the stability and precision of a liquid bath in a dry-well-sized package. Don’t be fooled by competitors who pour oil into a dry-well and call it a bath. Micro-Baths are maximized for true fluid-bath performance.

With a 48 mm (1.9-inch) diameter, 140 mm (5.5-inch) deep tank, a Micro-Bath can calibrate any type of sensor including short, square, or odd-shaped sensors. The problems of fit and immersion are virtually eliminated by using a fluid medium rather than a dry-block calibrator. Micro-Baths are perfect for liquid-in-glass and bimetal thermometers.

The Fluke 6102 has a temperature range from 35°C - 200°C, the Fluke 7102 covers -5°C - 125°C, and the Fluke 7103 extends from -30°C - 125°C. Stability, uniformity, and accuracy specifications cover the entire range for each bath, not just the best temperature.

All Micro-Baths have RS-232 ports, come with our Interface-it software. Also included are contacts to calibrate a thermal switch, eight set-point memory storage, ramp-rate adjust, and over-temperature safety cutout.

Micro-Baths are CFC- and compressor-free.

• World’s smallest portable calibration baths
• Calibrates sensors of any size or shape
• Stability to +/- 0.015°C
• Ranges from -30°C - 200°C






35°C - 200°C (95°F - 392°F) 

-5°C - 125°C (23°F - 257°F) 

-30°C - 125°C (-22°F - 257°F) 


+/- 0.25 °C 


+/- 0.02°C at 100°C (oil 5013)
+/- 0.03°C at 200°C (oil 5013) 

+/- 0.015°C at -5°C (oil 5010)
+/- 0.03°C at 121°C (oil 5010) 

+/- 0.03°C at -25°C (oil 5010)
+/- 0.05°C at 125°C (oil 5010) 


+/- 0.02°C 



Operating Temperature 

5°C - 45°C 

Heating Time 

25°C - 200°C: 40 min 

25°C - 100°C: 30 min 

25°C - 100°C: 35 min 

Cooling Time 

200°C to 100°C: 35 min 

25°C to 0°C: 30 min 

25°C to -25°C: 45 min

Well Size 

64 mm dia. x 140 mm deep (2.5 in x 5.5 in) (working area is 48 mm [1.9 in] in diameter) 

Size (WxHxD) 

14 cm x 26 cm x 20 cm
(5.5 in x 10.38 in x 8 in) 

18 cm x 31 cm x 24 cm
(7.2 in x 12 in x 9.5 in) 

23 cm x 34 cm x 26 cm
(9 in x 13.2 in x 10.5 in) 


4.5 kg (10 lb) with fluid 

6.8 kg (15 lb) with fluid 

9.8 kg (22 lb) with fluid 


0.75 L (1.6 pints) 

0.75 L (1.6 pints) 

1.0 L (2.11 pints) 


115 VAC (+/- 10%), 2.3 A or 230 VAC (+/- 10%), 1.1 A, switchable, 50/60 Hz,
270 W 

115 VAC (+/- 10%), 1.8 A or 230 VAC (+/- 10%), 0.9 A, switchable, 50/60 Hz,
200 W 

94 - 234 VAC (+/- 10%), 50/60 Hz, 400 W 

Computer Interface 

RS-232 included with free Interface-it software 

NIST-Traceable Calibration 

Data at 50°C, 100°C, 150°C, and 200°C 

Data at -5°C, 25°C, 55°C, 90°C, and 121°C 

Data at -25°C, 0°C, 25°C, 50°C, 75°C, 100°C, and 125°C 

Commonly Used Fluids1 

Water (distilled)

Do not use Water 2

Water (distilled)

Mineral Oil

Mineral Oil

Mineral Oil

Silicone Oil

Silicone Oil

Silicone Oil



1 Refer to the Users Guide for information on selecting the right bath fluid for your application.

2 If the 7102 tank coating is damaged, corrosion will occur due to dissimilar metals in contact with water.

Interface cable kit used to connect the 754 with dry-wells and micro-baths
Normally ships in 1-2 Weeks
$274.00 CAD
Spare stir bar for the 6102, 7102, or 7103 micro-baths
Normally ships in 1-2 Weeks
$75.00 CAD
Spare test lid for the 6102, 7102, or 7103 micro-baths
Normally ships in 1-2 Weeks
Starting At
$204.00 CAD
Tank extension adapter for the 7102 micro-bath
Normally ships in 1-2 Weeks
$719.00 CAD
Full line of bath fluids covering temperature ranges from 100C - 550C
Normally ships in 1-2 Weeks
Starting At
$64.00 CAD
Carrying cases for the 6102, 7102, or 7103 micro-bath thermometer calibrators
Normally ships in 1-2 Weeks
Starting At
$1,213.00 CAD