The Fluke dry-well is only four inches high and six inches wide, achieves temperatures as low as –10°C, includes a NIST-traceable calibration, and is stable to ±0.05°C. The Model 9102S is excellent for dial gauges, digital thermometers, bulb switches, and other sensors that need calibration below ambient. The 9102S has two wells so you can use one for a reference thermometer to increase accuracy. Both wells are 1/2 inch in diameter, and each has inserts available for almost any sensor size.

Smallest dry-wells in the world
Ranges from –10°C to 122°C
Accuracy to ±0.25°C, stability of ±0.05°C
RS-232 interface