165360 ⎘
Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using bands or wires as transmission elements using electrically actuated indicating means using opto-electrically actuated indicating means
Optical switch activator with glowable member
#2Optical switch with glowable activator portion
#3Tethered float liquid level sensor
#4Gauge for bulk fuel storage tanks
#5Float activated optical switch
#6Method and system for encoding fluid level
#7Invertible optical float switch