Why is the heavier end of the float, the one with magnetism, installed facing upward?
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Why must the heavier end of the float in a magnetic flap, namely the end with magnetism, be installed facing upward? Otherwise, the measurements will be inaccurate. Why is that?
Because the magnet is on the heavier side; installing it facing upward aligns it with the zero position of the magnetic flip switch.
Won’t the float drift as the heavier end faces upward during ascent?
Of course, the float will shift slightly; the gap between the chamber and the float is limited, and this error value has been taken into account during calibration, so there’s no need to worry. Besides, when using a float, you aren’t expecting such high accuracy anyway. If the magnet is facing downward, the buoyancy exerted on it by the medium must increase; moreover, the contact area with the medium increases, which in turn adds more factors that can affect the measurement results. Of course, the main consideration remains the issue of buoyancy.
Thank you! But won’t the float get stuck easily if it’s off-center?
It won’t get stuck, as the inner walls of the steel pipe are quite smooth, and the tops of the floats are also smooth. In the past, blockages have occurred due to weld scars inside the conduit, as well as because over time many impurities tend to accumulate inside it. If a blockage occurs, the float can be removed to clean the conduit.
Magnetic flap level gauges are primarily used for reference only; over time, it is advisable to clean the iron powder on the magnetic head