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?

Both models are:

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