Mini Fixed-Point Cells

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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-GWater T.P.0.0130 mm8 mm170 mm117 mm0.20.5
5914AIndium F.P.156.598543 mm8 mm214 mm140 mm1.02.0
5915ATin F.P.231.92843 mm8 mm214 mm140 mm1.43.0
5916AZinc F.P.419.52743 mm8 mm214 mm140 mm1.64.0
5917AAluminum F.P.660.32343 mm8 mm214 mm140 mm4.010.0
5918ASilver F.P.961.7843 mm8 mm214 mm140 mm7.0n/a
5919ACopper F.P.1084.6243 mm8 mm214 mm140 mm15.0n/a
5944Indium F.P.156.598541.3 mm7.8 mm222 mm156 mm0.71.4
5945Tin F.P.231.92841.3 mm7.8 mm222 mm156 mm0.81.6
5946Zinc F.P.419.52741.3 mm7.8 mm222 mm156 mm1.02.0
5947Aluminum F.P.660.32341.3 mm7.8 mm222 mm156 mm2.04.0
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

5901B-G
TPW Cell, mini, glass shell

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5914A
Mini Quartz Indium Cell

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5915A
Mini Quartz Tin Cell

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5916A
Mini Quartz Zinc Cell

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5917A
Mini Quartz Aluminum Cell

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5918A
Mini Quartz Silver Cell

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5919A
Mini Quartz Copper Cell

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5944
Mini Metal Cased Indium Cell

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5945
Mini Metal Cased Tin Cell

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5946

Mini Metal Cased Zinc Cell


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5947
Hart 5947 Mini Metal-Cased Aluminum Cell

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2940-9260
Container, Mini-Cell Support, 9260

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2942-9260
Container, SST Mini-Cell Support, 9260

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1904-In

Accredited Cell Intercomparison, Indium


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1904-Sn

Accredited Cell Intercomparison, Tin


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1904-Zn

Accredited Cell Intercomparison, Zinc


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1904-Al

Accredited Cell Intercomparison, Aluminum


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1904-Ag

Accredited Cell Intercomparison, Silver


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