Float-actuated devices

Float-Actuated Devices Float-actuated devices are characterized by a buoyant member that floats at the interface between two fluids. Since a significant force is usually required to move the indicating mechanism, float-actuated devices are generally limited to liqiiid-gas interfaces. By properly weighting the float, they can be used to measure hquid-liquid interfaces. Float-actuated devices may be classified on the basis of the method used to couple the float motion to the indicating system as discussed below. 

Liquid level Float-actuated devices Coupled with various types... 

A commonly used basis for classification of level devices is as follows float-actuated, displacer, and head devices, and a miscellaneous group which depends mainly on fluid characteristics. 

Compressed viscose sponges can be applied in devices in which a force is exerted when the compressed sponge is wetted. These sponges are used as actuator in a device to rescue keys attached to the floating device when it drops in water. 

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