With Fluke metrology wells, Temperature gradients, loading effects, and hysteresis have been minimized to make the calibration of the display much more meaningful.

Fluke Metrology Range
Wide Temperature Range
9170 –45 °C to 140 °C / –49 °F to 284 °F
9171 –30 °C to 155 °C / –22 °F to 311 °F
9172 35 °C to 425 °C / 95 °F to 797 °F
9173 50 °C to 700 °C / 122 °F to 1292 °F
Fluke 9170
The Model 9170 achieves the lowest temperatures of the series, reaching –45 °C in normal room conditions. The 9170 is stable to ±0.005 °C over its full temperature range (up to 140 °C) and has 160 mm (6.3 in) of immersion depth. With axial uniformity of ±0.02 °C and radial uniformity of ±0.01 °C, this model delivers exceptional uncertainty budgets and is perfect for a variety of pharmaceutical and other applications.
Fluke 9171
If you need more depth, the Model Fluke 9171 provides 203 mm (8 in) of immersion over temperatures from –30 °C all the way to 155 °C with a full-range stability of ±0.005 °C. Just like the Fluke 9170, this dry-well has exceptional axial and radial uniformity. The display of the Fluke 9171 is calibrated to an accuracy of ±0.1 °C over its full range.
Fluke 9172
The Model Fluke 9172 provides temperatures from 35 °C to 425 °C with a calibrated display accurate to ±0.2 °C at 425 °C. In addition to exceptional accuracy, the 9172 is stable from ±0.005 °C to ±0.01 °C, depending on temperature. With 203 mm (8 in) of immersion, the Fluke 9172 significantly reduces stem conduction errors at high temperatures.
Fluke 9173
For work between 50 °C and 700 °C, the Model Fluke 9173 provides unmatched performance. The Fluke 9173 has a display accuracy of ±0.25 °C at 700 °C and an immersion depth of 203 mm (8 in). Stability and uniformity performance of this unit is enough to dramatically reduce uncertainty budgets for calibrations of thermometers at high temperatures.

Selection Guide
Fluke 9170 | Fluke 9171 | Fluke 9172 | Fluke 9173 | |
---|---|---|---|---|
Range | -45°C to 140°C | +30°C to +155°C | +35°C to +425°C | +50°C to +700°C |
Stability | ±0.005°C | ±0.005°C |
±0.005°C to 100°C ±0.008°C to 425°C ±0.005°C to 700°C |
±0.005°C to 100°C ±0.01°C to 425°C ±0.03°C to 700°C |
Reference Probe | YES | YES | YES | YES |
Accuracy with Built-In Reference Probe |
±0.007°C at -100°C ±0.006°C at 0°C ±0.011°C at 155°C ±0.013°C at 225°C ±0.019°C at 425°C ±0.027°C at 661°C |
±0.007°C at -100°C ±0.006°C at 0°C ±0.011°C at 155°C ±0.013°C at 225°C ±0.019°C at 425°C ±0.027°C at 661°C |
±0.007°C at -100°C ±0.006°C at 0°C ±0.011°C at 155°C ±0.013°C at 225°C ±0.019°C at 425°C ±0.027°C at 661°C |
±0.007°C at -100°C ±0.006°C at 0°C ±0.011°C at 155°C ±0.013°C at 225°C ±0.019°C at 425°C ±0.027°C at 661°C |
Accuracy without External Reference Probe | ±0.1°C | ±0.1°C |
±0.1°C to 100°C ±0.15°C to 225°C ±0.2°C to 425°C |
±0.2°C to 425°C ±0.25°C to 660°C |
TQSoft Automatic Calibration | YES | YES | YES | YES |
Heating Time (Approximately) |
23°C to 140°C 32 Minutes -45°C to 140°C 45 Minutes |
23°C to 155°C 44 Minutes -30°C to 140°C 56 Minutes |
35°C to 425°C 27 Minutes | 50°C to 700°C 46 Minutes |
Well Sizes | Varied | Varied | Varied | Varied |
Physical Dimensions L x W x H | 336 x 203 x 323mm | 336 x 203 x 323mm | 336 x 203 x 323mm | 336 x 203 x 323mm |
Certificate Provided | Traceable | Traceable | Traceable | Traceable |
Carry Case Provided | Sturdy, Wheeled Carry Case | Sturdy, Wheeled Carry Case | Sturdy, Wheeled Carry Case | Sturdy, Wheeled Carry Case |
Datasheet | Download here | Download here | Download here | Download here |