Fluorine-lined thermistor thermometer
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The time constant of fluorine-lined thermoresistive temperature sensors, and whether they can be used in vacuum conditions
The specific time constant depends on the product specifications; vacuum conditions are not suitable, so it is recommended to use a sleeve – addressing the material issue will resolve this problem.
Lined on the surface of the thermometer – does it still bubble under vacuum conditions?
It is not suitable under vacuum; a slight negative pressure can be considered, but high levels of vacuum are not appropriate.
Lined on the surface of the flange thermometer; temperature 110°C. Does bubbling occur under vacuum conditions as well? Has anyone tried it?
In this case, bubbling and peeling occur, leading to corrosion of the base material, which is inevitable.
Those that are corroded are not as good as the cost-effective sleeves – by a long shot
Where can I find fluorine-lined thermoresistors? We need it too.
If it is a corrosive medium and metals cannot be used, 316L coated with spray paint can be employed, though it is more expensive. The tetrafluoride bushings tend to break, increasing response time
The time constant you mentioned must be the response time, right? Also, vacuum should be used with caution; we replaced a batch of them before, and almost all of the bushings were destroyed.