Mini Fixed-Point Cells
Key features
- Mini cells are made from the same materials and with the same procedures as their full-size counterparts.
- Optional metal cased designed cells.
- Temperatures, from the triple point of water (0.01 °C) to copper (1084.62 °C).
- With mini cells, realization and maintenance are made simple suing our 9210, 9230, and 9260 maintenace units.
Product overview: Mini Fixed-Point Cells
Fixed-points made simple
With mini cells, realization and maintenance are simple. Mini TPW cells can be automatically realized and maintained in our 9210 Maintenance Apparatus. Realizing the triple point of water takes only five minutes, but the plateaus last all day.
The realization and maintenance of indium, tin, zinc, and aluminum cells are likewise automated through our 9260 Mini Fixed-Point Cell Furnace. Work with them at their designated freeze point, or use them at their melting point to simplify the calibration process even further. We published a paper, “The Comparison Between the Freezing Point and Melting Point of Tin," to help you understand and benefit from the easier procedure of using the melting point of your standard.
These mini cells are made from the same materials and with the same procedures as their full-size counterparts. In fact, they can achieve nearly the same uncertainty levels as Hart’s traditional fixed-point cells. Probes as short as nine inches work with these cells. The specifications table gives you the immersion depth and uncertainty for each cell.
In addition to high-accuracy calibrations of RTDs and PRTs, these cells are perfect for validating the accuracy of SPRTs. If you’re doing comparison calibrations with SPRTs, then you know the importance of occasionally checking their accuracy between their own recalibrations. Because these cells are easy to use and maintain, verification checks are simple and convenient.
Metal-cased cells
Metal-cased cells can also be used in the 9260 maintenance furnace. Because they use stainless steel cases, these cells are easier to use and transport without risk of breakage. You’ll notice that we have designed the metal cased cells with more immersion depth to give even better uncertainty too!
You’ll find these cells easier to use than you expect. You can have a free copy of Xumo Li’s paper comparing freeze-point measurements with melting-point measurements, and if you want a high level of training in using metal freeze-point cells, you can attend one of Fluke Calibration's in-depth training classes held in our lab in Utah.
Specifications: Mini Fixed-Point Cells
| Specifications | ||||||||
| Model Number | Fixed- Point | Temperature ( °C) | Outside Diameter | Inside Diameter | Total Cell Height | Immersion Depth1 | Cell Only2 | Simple Realization2 |
| 5901B-G | Water T.P. | 0.01 | 30 mm | 8 mm | 170 mm | 117 mm | 0.2 | 0.5 |
| 5914A | Indium F.P. | 156.5985 | 43 mm | 8 mm | 214 mm | 140 mm | 1.0 | 2.0 |
| 5915A | Tin F.P. | 231.928 | 43 mm | 8 mm | 214 mm | 140 mm | 1.4 | 3.0 |
| 5916A | Zinc F.P. | 419.527 | 43 mm | 8 mm | 214 mm | 140 mm | 1.6 | 4.0 |
| 5917A | Aluminum F.P. | 660.323 | 43 mm | 8 mm | 214 mm | 140 mm | 4.0 | 10.0 |
| 5918A | Silver F.P. | 961.78 | 43 mm | 8 mm | 214 mm | 140 mm | 7.0 | n/a |
| 5919A | Copper F.P. | 1084.62 | 43 mm | 8 mm | 214 mm | 140 mm | 15.0 | n/a |
| 5944 | Indium F.P. | 156.5985 | 41.3 mm | 7.8 mm | 222 mm | 156 mm | 0.7 | 1.4 |
| 5945 | Tin F.P. | 231.928 | 41.3 mm | 7.8 mm | 222 mm | 156 mm | 0.8 | 1.6 |
| 5946 | Zinc F.P. | 419.527 | 41.3 mm | 7.8 mm | 222 mm | 156 mm | 1.0 | 2.0 |
| 5947 | Aluminum F.P. | 660.323 | 41.3 mm | 7.8 mm | 222 mm | 156 mm | 2.0 | 4.0 |
| Uncertainty (mK) k=2 1Distance from the bottom of the central well to the surface of the pure metal. 2"Cell Only" refers to the expanded uncertainty of the cell when realized by traditional methods and maintained using traditional maintenance devices. “Simple Realization refers to the expanded uncertainty of the cell when realized using practical methods (melting points instead of freezing points or slush ice instead of an ice mantle, for example) and maintained using Hart’s 9210 and 9260 mini cell maintenance apparatus. | ||||||||
Models: Mini Fixed-Point Cells
Mini Metal Cased Zinc Cell
UPC#: 0 95969 39261 7
Accredited Cell Intercomparison, Indium
Accredited Cell Intercomparison, Tin
Accredited Cell Intercomparison, Zinc
Accredited Cell Intercomparison, Aluminum
Accredited Cell Intercomparison, Silver
Manuals + resources: Mini Fixed-Point Cells
- Achieving 0.25 mK Uncertainty with an Integrated-Circuit Resistance Thermometer Readout
- Demonstrating Competency and Equivalency of Two Commercial SPRT Calibration Facilities
- Fixed Points for Secondary Level and Industrial Calibration
- Mini Metal-Cased Fixed-Point Cells
- New Generation of Fixed Points
- Quality Control of Fixed-Point Cells During Manufacturing
- Realization of the Freezing Points Of Indium, Tin and Zinc Using Stainless Steel–Cased Cells
- Stainless Steel-Cased Fixed-Point Cells and Their Applications
- Study of a New Fixed-Point System for Calibration of Short Secondary Platinum Resistance Thermometers
- Study of the Influence of Inducing Nucleation on the Performance of the Freezing Temperature Plateau of Metal Fixed-Point Cells
- Why Use a Triple Point of Water?