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Triple Point of Water Cell Fluke 5901A-G Borosilicate Glass
Description
The Triple Point of Water Cell Fluke 5901A-G Borosilicate Glass is a primary ITS-90 temperature interpolation standard designed for high-precision calibration and metrology laboratories. Delivering an expanded uncertainty better than +-0.0001 °C, the Fluke 5901A-G features repetitively distilled ocean water compliant with the VSMOW isotopic composition standard. Enclosed in a durable borosilicate glass housing with a 265 mm thermometer immersion depth, it includes an integrated handle arm that doubles as a McLeod gauge to verify residual air content.
Application Scope
Engineered for primary calibration laboratories, national metrology institutes, and research facilities:
- Realizing the fundamental triple point of water reference definition under the ITS-90 scale
- Performing periodic calibration and drift verification of standard platinum resistance thermometers (SPRTs)
- Maintaining highly stable temperature standards in liquid calibration baths
Specifications
| Parameter | Value |
| Expanded Uncertainty (k=2) | < 0.0001 °C |
| Reproducibility | 0.00002 °C |
| Housing Material | Borosilicate Glass |
| Immersion Depth | 265 mm |
| Outer Diameter / Inner Diameter / Length | 50 mm OD / 12 mm ID / 450 mm long |
| Water Source / Isotopic Standard | Ocean Water / VSMOW compliant |
| Isotopic Uncertainty Contribution | < +-0.000007 °C (+- 7 µK) |
Package Contents
- Fluke 5901A-G Borosilicate Glass TPW Cell
- Manufacturer Certificate of Conformance
- User Manual