Magnetic float for measuring drum liquid level
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Is it appropriate to use a magnetic float to measure the drum liquid level?
This post was last edited by tianya3047 on 2018-4-13 09:08 to measure liquid level using differential pressure
It’s completely fine for low-pressure boilers. The waste heat boiler used in the Casale ammonia synthesis plant is exactly that
Radar can be used in low-pressure boilers. For high-pressure boilers above 11 MPa, radar is not suitable. Generally, it is a local two-color level gauge with a magnetic float, and the upper part consists of a balance vessel plus a differential pressure transmitter.
The measurement of the drum liquid level relies on electric contacts, balance vessels, radar, and differential pressure.
Magnetic flap on one side, differential pressure transmitter on the other side
This isn’t necessarily accurate; there can be false water levels, and dual-color water gauges are generally used more often
Magnetic flip switches are not suitable, as the density of the water in the drum changes, while the weight of the float in such switches remains constant, which leads to errors.