Fluke 9190A-X Field Metrology Well

Fluke Calibration

Fluke authorised distributor and calibration house.

The Fluke Calibration 9190A Ultra-Cool Drywell is a benchtop temperature calibrator that can calibrate precision temperature instruments from −95 °C to 140 °C.

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£ 11,300.00

(£ 13,560.00 inc VAT.)

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‘X’ in the above model numbers to be replaced with A, B, C, D, E, and F as appropriate for the desired insert.

The Fluke 9190A ultra-cool field metrology well from Fluke Calibration provides excellent stability and uniformity and plenty of well depth for calibrating platinum resistance thermometers (PRTs), thermocouples and other industrial thermometers.

The Fluke 9190A Ultra-Cool Field Metrology Well is the most accurate and stable, cold temperature dry-block on the market. It’s ideal for applications that demand strict quality control and regulatory process compliance. These applications include on-location validation and calibration of RTDs, thermocouples, thermometers, and sensors used with process control equipment such as medical freezers, laboratory refrigerators, cold rooms, blood banks, sterilisers (autoclaves), and freeze dryers.

The Calibrator has two models: the 9190A and the 9190A-P. The 9190A-P is a “Process” version of the 9190A that combines the heat source with a built-in thermometer input panel.


Dual heater zone: Active heater zone control compensates for differential temperatures between zones.
All controls and inputs on the front panel.
Two-handed carry; built-in handles on front and back. All controls and inputs on the front panel.
Define up to eight set-point temperatures; automatically ramp to and “soak” at each set-point.
Stability indicator: Indicates when the block temperature is stable and within limits defined by the user.
Fast time to temperature and small footprint: Uses compact, efficient free piston stirling cooler technology (FPSC).
Remote operation: USB and RS-232 communications interfaces support remote operation from a computer.
4-20 mA connectors: Power a 4-20 mA transmitter from the drywell. Supplies 24 V dc loop power (process version).
4-wire PRT/RTD input: Reads a 4-wire, 3-wire, or 2-wire PRT/RTD. Accuracy ±0.02 ºC (process version).
Reference thermometer input automatically reads Fluke Calibration PRTs terminated with a “smart” connector.
Thermocouple input: Accepts common thermocouples with mini-jack termination. Types: J, K, T, E, R, S, M, L, U, N, C.


Wide temperature range: –95 °C to 140 °C.
Accuracy using built-in reference thermometer readout:  ± 0.05 °C full range.
Display accuracy: ± 0.2 °C full range.
Best-in-class stability: ± 0.015 °C full range.
Fast cooling time: 23 °C to –90 °C: 80 min, 23 °C to –95 °C: 90 min, 140 °C to 23 °C: 60 min.
Portability: Weighs only 16 kg (35 lbs)
Best measurement practices: Conforms with EURAMET cg-13 guidance.


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
Fluke 9190A warranty 1 year


Notes: [1] For ambient temperature of 23 °C. [2] Time from when the SETPOINT is reached to when the unit is with in stability specification. [3] The temperature range may be limited by the reference probe connected to the readout. The built-in reference accuracy does not include the sensor probe accuracy. It does not include the probe uncertainty or probe characterization errors.

Includes: Fluke 9190A, 9190-INSX Insert (X=A, B, C, D, E, or F), 2-meter (6-foot) Mains Power Cord, USB Cable, Getting Started Manual, Product CD that contains manuals and remote interface driver files, 9930 Interface-it Calibration Software and Users Guide, Report of Calibration and Calibration Label, Well Insulator Cap 1, Insert Removal Tool.

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Fluke 9190A-X Field Metrology Well