The relationship between the length of the bimetallic thermometer sleeve and the measurement
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I would like to ask what is the relationship between the length of the bimetallic thermometer sleeve and its measurement function?
To ensure accurate measurement, try to insert it at the center position
You can take a look at the national standards for bimetallic thermometers, as well as the design specifications for automation systems in the petrochemical and chemical industries; these documents contain relevant information. I recall that according to the current standards, for pipes, the insertion depth should be near the center of the pipe, while for equipment, the specifications provide detailed guidelines on this matter
As long as the temperature sensing element is at least 50 mm deep inside the pipe, the specification requirements are met.
I’m a new student; I want to learn some new things!
To ensure measurement accuracy, the sensing element of a bimetallic thermometer is located at its head; for accurate readings, this element must be placed in the area where the temperature is present. If it is inserted too far in or too short, it will result in inaccurate measurements
The length of the sleeve should be approximately equal to the height of the flange at the pipe end plus the actual insertion depth; it is sufficient to insert it to a depth of 1/3 to 2/3 of the inner diameter of the pipeline. Of course, this varies depending on the thickness of the pipeline, but it generally falls within this range. For pipelines with a diameter of less than 100, it is necessary to expand their diameter to 100, and the insertion depth should be determined based on a diameter of 100
To achieve accurate measurement, insert it as far in as possible; for specific installation requirements, refer to the product manual. Also, take into account the thickness of the insulation layer when determining the length of the sleeve. The flange or screw sleeve needs to be exposed
It’s okay; as long as it comes into contact with the medium at the 1/3 to 1/2 portion of the pipe