Fluke 9103 & 9140 Field Dry-Well Calibrators

Great performance in portable instruments
  • Lightweight and very portable
  • Accuracy to ±0.25 °C
  • RS-232 and Interface-it software included
  • Easy to recalibrate

If you’ve been using a dry well calibrator or dry block calibrator for field work, you know there’s a lot more to them than temperature range and stability. Size, weight, speed, convenience, and software are also significant.

A field dry well needs to be portable, flexible, and suitable for high-volume calibrations or certifications. If it’s not, you’ll soon forget about the great stuff the sales rep told you and realize what you’ve really bought.

At Fluke Calibration, we use dry well calibrators every day in our manufacturing and calibration work, and we know what makes a dry well easy and productive to use—which is exactly how users describe our series of field dry wells. These dry wells work for you instead of the other way around.

Data Sheet


Specifications: Fluke Calibration 9103/9140 Field Dry-Well

Specifications 9103 9140
Range –25°C to 140°C
(–13°F to 284°F)
at 23°C ambient
35°C to 350°C
(95°F to 662°F)
Accuracy ±0.25°C (holes greater than 1/4″ [6.35mm]: ±1°C) ±0.5°C (holes greater than 1/4″ [6.35mm]: ±1°C)
Stability ±0.02°C at –25°C
±0.04°C at 140°C
±0.03°C at 50°C
±0.05°C at 350°C
Well-to-well uniformity ±0.1°C between similarly sized wells ±0.1°C with similarly sized wells
Heating times 18 minutes from ambient to 140°C 12 minutes from ambient to 350°C
Cooling times 20 minutes from ambient to –25°C 15 minutes from 350°C to 100°C
Stabilization time 7 minutes 7 minutes
Immersion depth 124 mm (4.875 in) 124 mm (4.875 in)
Inserts Insert A, B, C, or D included (specify when ordering)
Outside insert dimensions 31.8 mm dia. x 124 mm (1.25 x 4.88 in)
Computer interface RS-232 included with free Interface-it software (Model 9930)
Power 115 V AC (±10%), 1.3 A or 230 V AC (±10%), 0.7 A, switchable, 50/60 Hz, 150 W 115 V AC (±10%), 4.4 A or 230 V AC (±10%), 2.2 A, switchable, 50/60 Hz, 500 W
Size (W x H x D) 143 x 261 x 245 mm
(5.63 x 10.25 x 9.63 in)
152 x 86 x 197 mm
(6 x 3.375 x 7.75 in)
Weight 5.7 kg (12 lb) 2.7 kg (6 lb)
NIST-traceable certificate Data at –25°C, 0°C, 25°C, 50°C, 75°C, 100°C, and 140° Data at 50°C, 100°C, 150°C, 200°C, 250°C, 300°C, and 350°C