Abstract
Abstract This paper presents the design and measurement techniques for a new type of liquid helium level meter. The measurement principle is given by the change of heat transfer rate with the liquid level. Detailed heat transfer analysis has been done to show the anticipated behavior and accuracy of the meter. To verify our design, a prototype level meter was fabricated and tested in saturated He II bath with temperature from 1.7 K to 2.0 K. With the experiment, we obtained the relationship between overall heater power and liquid level. The data indicate that the device can measure liquid level with the uncertainty of ±1 mm in a practical system.
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