Fluke 9100S Handheld Dry-Well

Since we introduced the world’s first truly handheld dry-well, many have tried to duplicate it—in vain. Despite its small size (2¼ inches high and 5 inches wide) and light weight, the 9100S outperforms every dry-well in its class in the world.

It’s simple and convenient, too. Anyone can learn to use one in less than 15 minutes. It has a range to 375°C (707°F) and is perfect for checking RTDs, thermocouples, and small bimetal thermometers in the field.

Plug it in, switch it on (Note, these wells are fixed and not interchangeable,) set the temperature with the front-panel buttons, and insert your probe into the properly sized well. Compare the reading of your device to the display temperature or to an external reference, and the difference is the error in your device. With a proprietary Fluke Calibration temperature controller, the 9100S has a display resolution of 0.1 degrees, an accuracy of ±0.5°C, a stability of ±0.1°C, and a stabilization time of just five minutes.

Data Sheet


Specifications: Fluke Calibration 9100S Handheld Dry-Well

Specifications 9100S 9102S
Range 35°C to 375°C (95°F to 707°F) –10°C to 122°C (14°F to 252°F) at 23°C ambient
Accuracy ±0.25°C at 50°C; ±0.25°C at 100°C; ±0.5°C at 375°C ±0.25°C
Stability ±0.07°C at 50°C; ±0.1°C at 100°C; ±0.3°C at 375°C ±0.05°C
Well-to-well uniformity ±0.2°C with sensors of similar size at equal depths within wells
Heating times 35°C to 375°C: 9.5 minutes Ambient to 100°C: 10 minutes
Stabilization 5 minutes 7 minutes
Cooling times 375°C to 100°C: 14 minutes Ambient to 0°C: 10 minutes
Well depth 102 mm (4 in); 1.6 mm (1/16 in) hole is 89 mm (3.5 in) deep 102 mm (4 in)
Removable inserts N/A Available in sizes from 1.6 mm (1/16 in) to 11.1 mm (7/16 in) [6.4 mm (1/4 in) and 4.8 mm (3/16 in) included]
Power 115 V AC (±10%), 55–65 Hz, 1.5 A or 230 V AC (±10%), 0.8 A, 45–55 Hz, 175 W 94-234 V AC (±10%), 50/60 Hz, 60 W; or 12 V DC
Size (H x W x D) 57 x 125 x 150 mm (2.25 x 4.9 x 6.1 in) 99 x 140 x 175 mm (3.9 x 5.5 x 6.9 in)
Weight 1 kg (2 lb 3 oz) 1.8 kg (4 lb)
Computer interface RS-232 included
NIST-traceable calibration Data at 50°C, 100°C, 150°C, 200°C, 250°C, 300°C and 375°C Data at –10°C, 0°C, 25 °C, 50°C, 75 °C,100°C and 122°C