Liquid-level transducer/indicator

Abstract

The invention contemplates a liquid-level sensing transducer having a baseplate which is adapted to removably secure the same to close an opening in a tank within which liquid level is to be measured by noting the angle of a pivoted float arm. A pivot-bearing mount of insulating material is secured by two spaced bolts to the baseplate, and this mount establishes two spaced parallel planes of support which are perpendicular to the pivot axis. A conductive plate is mounted in one of these two planes, and an electrical-resistance element is mounted in the other of these planes. A float-arm pivot member is rotatable in the pivot-bearing mount and includes a radially offsetting arm which sweeps the space between the parallel planes. The offsetting arm of the pivot member supports a moving-contact element in resiliently loaded wiping contact with the conductive plate at one end and with the resistance element at the other end. The mounting bolts provide two-pole electrical access (a) to the conductive plate and (b) to an end of the electrical resistance. And a base-plate window between the bolt connections provides direct viewing of an arcuate indicator surface which is an integral part of the pivot member.