Fluke ITS-90 Fixed-Point Cells

Constructed using metal samples with purity of at least 99.9999 % (six 9s) and, in many cases, 99.99999 % (seven 9s).
Every ITS-90 fixed point available from argon to copper
Plateaus last days (gallium for weeks and TPW for months).
Accredited Cell Intercomaparisons available.

Description
Additional information
Specifications

Description

The Fluke ITS-90 refers to a set of temperature standards and equipment designed for precise temperature calibration based on the International Temperature Scale of 1990 (ITS-90). Here’s a breakdown of what that means:

What is the ITS-90?

It’s a standard that defines how temperature is measured. Think of it as the official rulebook for temperature readings, ensuring everyone around the world is on the same page.
It uses specific fixed points (like the freezing point of water or the melting point of gallium) as references.
These fixed points are highly stable and reproducible, making them excellent for calibrating thermometers and other temperature-measuring devices.

Fluke, a leading manufacturer of calibration equipment, provides a comprehensive range of tools and standards to help you work with the ITS-90:

Standard Platinum Resistance Thermometers (SPRTs): These are very accurate thermometers used as the primary instruments for ITS-90. Fluke offers various types of SPRTs, each designed for specific temperature ranges and applications.
Fixed-Point Cells: These devices create the actual fixed-point temperatures defined by the ITS-90. Fluke manufactures cells for various fixed points, from the triple point of water to the freezing point of metals.
Calibration Baths and Furnaces: These provide stable temperature environments needed for calibrating SPRTs and maintaining fixed-point cells.

The Fluke ITS-90 offering provides the tools and standards necessary to achieve the most accurate and reliable temperature calibrations based on the internationally recognized ITS-90 scale.

Additional information

Brand	Fluke Calibration

Specifications: ITS-90 Fixed-Point Cells

Specifications
Model	Fixed Point	Style	Assigned Value ( °C)	Outside Diameter	Inside Diameter	Total Outside Cell Height	Depth^‡	Cell Uncertainty (mK, k=2)	Certification (mK, k=2)^†
5900E	Mercury	Stainless Steel	–38.8344	31 mm	8.2 mm	470 mm	200 mm	0.2	0.25
5904	Indium	Traditional Quartz Glass	156.5985	48 mm	8 mm	285 mm	195 mm	0.7	0.7
5905	Tin	Traditional Quartz Glass	231.928	48 mm	8 mm	285 mm	195 mm	0.5	0.8
5906	Zinc	Traditional Quartz Glass	419.527	48 mm	8 mm	285 mm	195 mm	0.9	1.0
5907	Aluminum	Traditional Quartz Glass	660.323	48 mm	8 mm	285 mm	195 mm	1.3	1.8
5908	Silver	Traditional Quartz Glass	961.78	48 mm	8 mm	285 mm	195 mm	2.4	4.5
5909	Copper	Traditional Quartz Glass	1084.62	48 mm	8 mm	285 mm	195 mm	10.1	12.0
5924	Indium	Open Quartz Glass	156.5985	50 mm	8 mm	596 mm	195 mm	0.7	0.7
5925	Tin	Open Quartz Glass	231.928	50 mm	8 mm	596 mm	195 mm	0.5	0.8
5926	Zinc	Open Quartz Glass	419.527	50 mm	8 mm	596 mm	195 mm	0.9	1.0
5927A-L	Aluminum	Open Quartz Glass (long)	660.323	50 mm	8 mm	696 mm	195 mm	1.3	1.8
5927A-S	Aluminum	Open Quartz Glass (short)	660.323	50 mm	8 mm	596 mm	195 mm	1.3	1.8
5928	Silver	Open Quartz Glass	961.78	50 mm	8 mm	696 mm	195 mm	2.4	4.5
5929	Copper	Open Quartz Glass	1084.62	50 mm	8 mm	696 mm	195 mm	10	12.0
5943	Gallium	Stainless Steel	29.7646	38.1 mm	8.2 mm	250 mm	168 mm	0.1	0.1
^†Certification uncertainty values may vary slightly from those listed here. If the exact value is needed, please contact Fluke. ^‡Depth is measured from the bottom of the thermometer well to the top of the pure reference material.