When remote readouts are required or when the process material is hazardous or is at high pressures, float manometers are used. In these units, the variations in pressure differential cause the level of filling liquid to change, and the float moves with the changing level. The float motion is brought out of the chamber by a lever rotating in a pressure seal bearing. Other designs are also available using torque tubes or magnetic followers. The lever rotation can be used to drive local indicators or transmitting devices for remote readout.
The variations in pressure differential cause the level of filling liquid to change, and the float moves with the changing level. The float motion is brought out of the chamber by a lever rotating in a pressure seal bearing. Other designs are also available using torque tubes or magnetic followers. The lever rotation can be used to drive local indicators or transmitting devices for remote readout.
When used as a pressure sensor, the process pressure is connected to one side of the manometer and a reference pressure to the other. If the reference pressure is atmospheric, the float movement is related to the pressure differential between the process pressure and atmosphere. Spans are available from 20 to 1000 in. H2O (from 5 to 250 kPa).
List of Prominent Suppliers: Barksdale, BD Sensors, Brooks Instrument, Bsria, Dwyer, Flowtech, Kane, Hansa Flex, Mayuri Instruments, Meriam, New-Flow, PS Instruments, Sauermann, Trox Technik, TSI, TTseries
Instrumentation Basics 