Fluke Calibration

5960A Triple Point of Argon System

Realize the argon triple point using a consistent, reproducible process with the lowest uncertainty of any commercially available system


$96,385.00 CAD
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The Fluke Calibration 5960A Triple Point of Argon System enables primary standards laboratories to realize the argon triple point using a consistent, reproducible process with the lowest uncertainty of any commercially available system. The Fluke Calibration system produces a 30 hour temperature plateau and provides multiple entrant wells to increase SPRT calibration efficiency and throughput.

The argon cell is carefully built with an ultra-clean process using 99.9999% (six nines) purity argon resulting in an uncertainty factor from impurities of 0.015 mK. The deep, 480 mm immersion depth of the entrant well minimizes the effects of stem conduction to less than 0.01 mK and radial uniformity to less than 0.05 mK.

The 5960A system utilizes liquid nitrogen (LN2) in a Dewar vessel surrounding an argon cell to achieve -189.3442°C. A digital controller combined with a heater maintains a temperature plateau lasting up to 30 hours with 0.1 mK variation without using complicated pressure controls.

The display panel of the 5690A provides a simple menu structure with soft function keys for setup and programming the argon system. The readout displays simultaneously the set-point temperature, actual control sensor temperature and percent heater power.

• Low uncertainty of 0.25 mK
• Temperature plateau duration longer than 30 h
• Four entrant wells with radial uniformity less than 0.05 mK
• 480 mm total immersion depth
• Argon purity of 99.9999%
• Multi-language display support

Assigned Value -189.3442C
Argon Gas Purity 99.9999% (6N purity)
Uncertainty (k = 2) 0.25 mK
Length of Plateau (0.1 mK) > 30 h
Argon Cell Depth* 160 mm
Number of Entrant Wells 4
Radial Uniformity 0.05 mK
Total Immersion Depth 480 mm
Entrant Well Inner Diameter (ID) 8.0 mm
Argon Gas Volume 13.4 mol (535 g)
Liquid Nitrogen Dewar Volume 44.2 L
Display Resolution 0.001C
Set-Point Accuracy 0.1C (adjustable)
Power Requirements 100 V to 115 V (+/- 10 %) 50/60 Hz, 230 W
230 V (+/- 10 %) 50/60 Hz, 230 W
System Fuse Ratings 115 V: 2 A T 250 V
230 V: 1 A T 250 V
Size (H x W x D) 952 mm x 673 mm x 483 mm (37.5 in x 26.5 in x 19 in)
Weight 94 kg (207 lbs)
*Measured from the bottom of the probe well to the surface of argon sample