Thermal Mapping of Liquid Nitrogen Vessel

GOOD VALIDATION PRACTICE (cGVP) EQUIPMENT VALIDATION
1

We are hoping to thermally map the vapour phase of a liquid nitrogen vessel using a kaye validator. Has anyone had any experience of this?
We were thinking of using the Liquid Nitrogen as the low point calibration, a CTR-80 as the high point (-80)does anyone have an idea of how to get the midpoint?
Additionally can anyone recommend an appropriate thermocouple and provider?

2

You can use Type T thermocouples.
I did many LN2 vessels with 0, -196 (LN2) and no mid point. If you are thinking that mid point of -140 or so; then I do not know it is achievable.
GE provides the type T tcs.

[quote=IncValidation]We are hoping to thermally map the vapour phase of a liquid nitrogen vessel using a kaye validator. Has anyone had any experience of this?
We were thinking of using the Liquid Nitrogen as the low point calibration, a CTR-80 as the high point (-80)does anyone have an idea of how to get the midpoint?
Additionally can anyone recommend an appropriate thermocouple and provider?[/quote]

3

Thanks for your help USFDA!