DUAL MEASUREMENT LIQUID LEVEL TRANSDUCER

摘要

A liquid level transducer for a tank, such as a railroad tank car or the like, includes a mounting head connected to the tank and a sensor assembly extending into the tank from the mounting head. The sensor assembly includes a sensor tube located in the tank and a gauging rod assembly positioned in the sensor tube. The gauging rod assembly can be pulled out of the tank until it magnetically couples with a magnetic float that surrounds the sensor tube. The float moves in response to a change in liquid level and the magnetic coupling provides the user with a visual indication of the liquid level. A sensor board extends along a length of the gauging rod assembly and is responsive to movement of the float for electronically determining the liquid level without the need to magnetically couple the gauging rod assembly to the float.

主权项

1. A transducer for determining the level of liquid within a container, the transducer comprising:
a mounting head adapted for connection to the container; and a sensor assembly adapted to extend into the container from the mounting head, the sensor assembly comprising:
a sensor tube extending downwardly from the mounting head;a gauging rod assembly having an elongate rod positioned in the sensor tube for selective movement out of the tank for visually determining the liquid level;a first magnet connected to the gauging rod assembly;a float surrounding the sensor tube for sliding therealong in response to a change in liquid level;a second magnet connected to the float for selective coupling to the first magnet so that the gauging rod assembly and the float are selectively coupled together; anda first sensor board extending along a length of one of the sensor tube and the gauging rod assembly and being responsive to movement of the float for electronically determining the liquid level without the need to magnetically couple the gauging rod assembly to the float.