9190A-X Ultra-Cool Field Metrology Well

Calibration baths are the most stable and uniform temperature sources available, but they aren’t a good fit for clean rooms. The size of a bath limits its portability, and bath fluids can easily spill and give off vapors. The 9190A Ultra-Cool Field Metrology Well is a great alternative. Its wide temperature range brackets the coldest and highest temperature ranges required for pharmaceutical, biomedical and food processing applications. The 9190A is small and lightweight, making it easy to transport. And since it does not use heat transfer fluids, clean rooms stay clean. The 9190A cooling and heating times are faster than a calibration bath—that means calibration work gets done more quickly.

An accurate temperature source is critical for dependable process measurements

Unreliable process measurements can have a damaging impact on business, leading to poor product quality, recalls, fines, waste, and lost profits. Ultimately, measurements are only as good as the temperature sources used to calibrate the measurement equipment. The 9190A Ultra-Cool Field Metrology Well incorporates the best technology and design expertise gained from decades of dry-block development experience. The 9190A conforms with EURAMET cg-13 guidelines for best measurement practices for temperature block calibrators. As a result, you can be assured that the 9190A specifications for accuracy, stability, axial (vertical) uniformity, radial (well-to-well) uniformity, loading, and hysteresis have been thoroughly and carefully defined and tested. With a 9190A Ultra-Cool Field Metrology Well, you can be confident you’re using the most accurate and stable ultra-cool dry-block calibrator available. And that will have a positive impact on your business.


Temperature range at 23 °C –95 °C to 140 °C (–139 °F to 284 °F)
Display  accuracy ± 0.2 °C full range
Accuracy with  external reference [3] ± 0.05 °C full range
Stability ± 0.015 °C full range
Axial uniformity at 40 mm (1.6  in) ± 0.05 °C full range
Radial gradient ±0.01 °C full range
Loading effect (with a 6.35  mm reference probe  and three  6.35  mm probes)
± 0.006 °C full range
(versus display  with one 6.35  mm probe)
± 0.25 °C at –95 °C
± 0.10 °C at 140 °C
Operating conditions 0 °C to 35 °C, 0 % to 90 %
RH (non-condensing) < 2000 m altitude
Environmental conditions for all specifications except temperature range 13 °C to 33 °C
Immersion (well)  depth 160  mm (6.3 in)
Well diameter 30 mm (1.18 in)
Heating time [1] –95 °C to 140 °C: 40 min
Cooling  time [1] 23 °C to –90 °C: 80 min
23 °C to –95 °C: 90 min
140 °C to 23 °C: 60 min
Stabilization time [2] 15 min
Resolution 0.01  °
Display LCD, °C or °F user selectable
Size (H x W x D) 480  mm x 205  mm x 380  mm (18.8 in x 8.0 in x 14.9  in)
Weight 16 kg (35 lb)
Power requirements 100 V to 115 V (± 10 %) 50/60 Hz, 575 W
200 V to 230 V (± 10 %) 50/60 Hz, 575 W
System fuse  ratings 115 V: 6.3 A T 250 V
230 V: 3.15  A T 250 V
4–20 mA Fuse  (-P model only) 50 mA F 250 V
Computer interface RS-232, USB Serial, and 9930 interface-it temperature calibration software included
Safety IEC 61010-1, Installation Category II, Pollution degree 2
Electromagnetic environment IEC 61326-1: Basic
Refrigerants R32 (Difluoromethane)
< 20 g, ASHRAE safety group A2L
R704 (Helium)
< 20 g, ASHRAE safety group A1
9190A-X Ultra-Cool Field Metrology Well