thermometer
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Is this a sleeve-type thermometer? Can it be removed directly?
Yes, it is detachable. I remember that it generally does not come into direct contact with the medium, meaning there is a sleeve welded inside.
It can be removed directly; these usually come with sleeves, and the thermal resistors as well. Otherwise, under certain operating conditions, it cannot withstand erosion and will bend prematurely.
Haven’t you already removed it? Generally, there should be an additional protective sleeve on the outside; of course, it’s possible that some don’t use such a sleeve
You have already removed that outer sleeve.
This is called a sliding thread, not a sleeve; it is suitable for use in pipes where there is no pressure.
Bimetallic thermometer. The thick one is the sleeve, and the thin one is the temperature probe. Turning the two nuts below in the opposite direction should loosen them.
This is a universal bimetallic thermometer with a sleeve, making it convenient for maintenance and replacement.
This is already the main body of the thermometer; you haven’t removed the sleeve, or it’s not there in the first place. If you try to remove it further, you can do so – and then two wires will be visible. Once that happens, the thermometer is basically ruined