Patent ID: 9557205
Date: 2017-01-31
CPC Classifications: G01F

Claim:
1. A redundant level measuring system comprising: a chamber for fluidic coupling to a process vessel whereby material level in the vessel equalizes with material level in the chamber; an elongate partition in the chamber defining a float space and an open space; a float including a magnet in the chamber float space for rising and falling with material level in the chamber; a magnet actuated visual indicator mounted to the chamber for indicating level of the magnet in the chamber; a through air measurement instrument including a housing, an antenna mounted to the housing, a measurement circuit in the housing including a radiating element, and a body supporting the radiating element in the housing proximate the antenna for rotation relative to the housing and the antenna, the instrument being mounted atop the chamber with the antenna directed downwardly to the chamber open space, and the measurement circuit generating and receiving a frequency signal using the radiating element, the measurement circuit measuring level of the material in the chamber.