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LN 2 COMPARISON CALIBRATOR - Model 7196

Features

• Low-cost calibrations to –196°C
• Simple to use
• Uncertainty less than 2 mK

If you need to do calibrations at the triple point of argon but don’t want the complexity and cost of using an argon triple point cell, Hart’s Model 7196 LN 2 Comparison Calibrators will solve your problems. And they do it for less than half the price of other argon triple point simulators. 

The nominal boiling point of nitrogen is –196°C at one atmosphere of pressure. The defining triple point of argon is –189.3442°C. While there is a difference between the nominal boiling point of nitrogen and the argon triple point, the difference can be corrected for mathematically, and an uncertainty of less than 2 mK from the actual argon triple point is achievable. 

Hart’s LN 2 Comparison Calibrators consist of a super-insulated glass dewar, a high-purity copper block, and a precision-fit lid. The dewar is filled with LN 2 and the copper block is suspended in it; an SPRT is inserted into the block and a calibration is performed against your own calibrated SPRT. The 7196-4 includes four 8-mm (0.32") wells. The 7196-13 includes five 8-mm (0.32") wells and eight 6.35-mm (0.25") wells. 

Hart’s LN 2 Comparison Calibrators are neither expensive nor complicated to use. If you need supporting data or would like to discuss the theory of operation of an LN 2 Comparison Calibrator, call Hart Scientific today. (Or come to one of our training courses and we’ll show you.) 

User's Guide

Right click one of the following links and “Save Target As ...” to download the catalog pages/data sheet or a product User's Guide in Acrobat (.pdf)  format.

• Catalog page(s)/data sheet

• 7196 User's Guide

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