Fluke Calibration 9103/9140 Field Dry-Well

Fluke Calibration 9103/9140 Field Dry-Well is rated 5.0 out of 5 by 1.
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  • Fluke Calibration 9103/9140/9141 Field Dry-Well 1

Key features

  • Accuracy to ±0.25°C and comes with an RS-232 interface.
  • The 9103 covers below-ambient temperatures as low as –25 °C. The 9103 is stable to ±0.02 °C
  • The 9140 has a temperature range of 35 °C to 350 °C. The 9140 has a stability of ±0.05 °C.
  • Features designed with user convenience and productivity in mind.

Product overview: Fluke Calibration 9103/9140 Field Dry-Well

Portable, fast, and accurate temperature sources for on-site calibration

Exceptional Performance in a Compact Design

The Fluke 9103 and 9140 Field Dry-Wells outperform the competition in nearly every category—performance, size, weight, ease of use, calibration simplicity, software integration, and price.

Each unit features:

  • Adjustable heating and cooling rates via the front panel
  • Thermal switch actuation testing
  • Multiple-hole inserts for compatibility with a wide range of probe sizes

Fast Calibration with Minimal Downtime

  • Units are easy to calibrate without opening the case, reducing maintenance costs and downtime
  • All units include a NIST-traceable calibration certificate at no additional charge
  • Factory-tested for accuracy and reliability before shipment

Software Integration

Fluke’s Interface-it software supports:

  • Set-point and ramp rate control
  • Real-time temperature logging
  • Electronic strip chart creation
  • Thermal switch test automation with data collection
  • Windows-based interface with intuitive graphical controls

Whether you need basic control or full automation, Fluke has a software solution ready.

Fluke 9103 – Low-Temperature Field Dry-Well

  • Temperature Range: Down to –25 °C (actual, not below ambient)
  • Stability: ±0.02 °C
  • Display Accuracy: ±0.25 °C across full range
  • Speed:
    • Reaches 0 °C in 8 minutes
    • Reaches 100 °C in 6 minutes

Key Advantage:

Many competitors advertise –45 °C below ambient, which only reaches around –20 °C. The 9103 delivers a true –25 °C in standard room conditions—no walk-in freezer required.

Insert Options:

Choose from four removable inserts to suit your calibration needs:

  • Insert A: One well each from 1/16” to 1/2”
  • Insert B: Two wells each of 3/8”, 1/4”, and 3/16” (ideal for comparison calibrations)
  • Insert C: Six 1/4” wells for multiple probe calibrations
  • Insert D: Three pairs of metric-sized wells

Fluke 9140 – Mid-Temperature Field Dry-Well

  • Temperature Range: 35 °C to 350 °C
  • Stability: ±0.05 °C or better
  • Uniformity:
    • 0.1 °C in small-diameter wells
    • 0.4 °C in largest-diameter wells
  • Speed: Reaches max temperature in 12 minutes
  • Size: Weighs only 6 lbs, easily portable with one hand
  • Display Accuracy: ±0.5 °C

For improved calibration accuracy, use an external thermometer alongside the built-in display.

Insert Options:

Three removable inserts available to accommodate various probe sizes.

Why Choose the 9103 or 9140?

ModelTemperature RangeStabilityDisplay AccuracyKey Benefits
9103–25 °C to 110+ °C±0.02 °C±0.25 °CTrue sub-ambient performance without freezer
914035 °C to 350 °C±0.05 °C±0.5 °CLight, fast, and ideal for field portability

Both models are:

  • Reliable for industrial and lab environments
  • Versatile with multiple insert options
  • Backed by Fluke’s proven calibration technology

Specifications: Fluke Calibration 9103/9140 Field Dry-Well

Specifications91039140
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 times18 minutes from ambient to 140°C12 minutes from ambient to 350°C
Cooling times20 minutes from ambient to –25°C15 minutes from 350°C to 100°C
Stabilization time7 minutes7 minutes
Immersion depth124 mm (4.875 in)124 mm (4.875 in)
InsertsInsert A, B, C, or D included (specify when ordering)
Outside insert dimensions31.8 mm dia. x 124 mm (1.25 x 4.88 in)
Computer interfaceRS-232 included with free Interface-it software (Model 9930)
Power115 V AC (±10%), 1.3 A or 230 V AC (±10%), 0.7 A, switchable, 50/60 Hz, 150 W115 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)
Weight5.7 kg (12 lb)2.7 kg (6 lb)
NIST-traceable certificateData 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

Models: Fluke Calibration 9103/9140 Field Dry-Well

Fluke 9103
Fluke Calibration 9103 Field Dry-Well
Insert, blank (cold side)
-25°C to 140°C

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Fluke 9103-A
Fluke Calibration 9103-A Field Dry-Well
Insert "A", miscellaneous (cold side)
–25°C to 140°C

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Wells: 1/16" (1.6 mm), 1/8" (3.2 mm), 3/16" (4.8 mm), 1/4" (6.35 mm), 3/8" (9.5 mm) and 1/2" (12.7 mm)
Fluke 9103-B
Fluke Calibration 9103-B Field Dry-Well
Insert "B", comparison (cold side)
–25°C to 140°C

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Wells: 2 at 3/16" (4.8 mm), 2 at 1/4" (6.35 mm), and 2 at 3/8" (9.5 mm)
Fluke 9103-C
Fluke Calibration 9103-C Field Dry-Well
Insert "C", six 1/4 in wells (cold side)
–25°C to 140°C

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Wells: 6 at 1/4" (6.35 mm)
Fluke 9103-D
Fluke Calibration 9103-D Field Dry-Well
Insert "D", comparison - metric (cold side)
–25°C to 140°C

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Wells: 2 at 3 mm, 2 at 4 mm, and 2 at 6 mm
Fluke 9140
Fluke Calibration 9140 Field Dry-Well
Insert, blank
35°C to 350°C

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Fluke 9140-A
Fluke Calibration 9140-A Field Dry-Well
Insert "A"
35°C to 350°C

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Wells: 1/16" (1.6 mm), 1/8" (3.2 mm), 3/16" (4.8 mm), 1/4" (6.35 mm), 3/8" (9.5 mm) and 1/2" (12.7 mm)
Fluke 9140-B
Fluke Calibration 9140-B Field Dry-Well
Insert "B"
35°C to 350°C

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Wells: 2 at 3/16" (4.8 mm), 2 at 1/4" (6.35 mm), and 2 at 3/8" (9.5 mm)
Fluke 9140-C
Fluke Calibration 9140-C Field Dry-Well
Insert "C"
35°C to 350°C

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Wells: 6 at 1/4" (6.35 mm)
Fluke 9140-D
Fluke Calibration 9140-D Field Dry-Well
Insert "D"
35°C to 350°C

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Wells: 2 at 3 mm, 2 at 4 mm, and 2 at 6 mm
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Rated 5 out of 5 by from Great product! This item was purchased for our lab two years ago and it has made checking our ambient temperature probes a snap. No more sending them out to a remote calibration lab with attendant costs and lead times.
Date published: 2016-12-07
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