| Patents for G01F 23 - Indicating or measuring liquid level, or level of fluent solid material, e.g. indicating in terms of volume, indicating by means of an alarm (31,056) |
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| 10/31/1978 | US4122875 Can filling apparatus and methods and apparatus and methods for conveying and controlling the feeding of wet materials |
| 10/31/1978 | US4122718 Wire enclosed in teflon |
| 10/24/1978 | US4122429 Apparatus for measuring water depth |
| 10/24/1978 | US4122392 System of detecting a change in the charge put in a metallurgical furnace or the like |
| 10/24/1978 | US4121457 Liquid sensor |
| 10/17/1978 | US4121103 Caustic detection system |
| 10/17/1978 | US4121094 System for detecting, indicating and regulating the level of semi-solid matter in a reservoir |
| 10/17/1978 | CA1040455A1 Piezoelectric liquid level sensor |
| 10/10/1978 | US4119860 Fluid measurement |
| 10/10/1978 | US4118984 Liquid level indicator for an extremely low temperature-liquefied gas employing a superconductor wire |
| 10/10/1978 | US4118983 Method of and device for controlling gas-liquid or liquid-liquid interface in monolayer reservoirs |
| 10/10/1978 | CA1039974A1 Quick-opening sight glass assembly |
| 10/03/1978 | US4118634 Developer solution level detector |
| 09/26/1978 | US4116062 Removable tank gauge float |
| 09/26/1978 | US4116045 Oil detector |
| 09/26/1978 | US4115877 Liquid level sensing device and swimming pool water circulation systems containing the same |
| 09/19/1978 | US4114441 Method and apparatus for measuring the height of filling material on a surface, such as within a container |
| 09/19/1978 | CA1038648A1 Sight glass assembly |
| 09/12/1978 | US4114130 Fuel level sender with molded plastic case |
| 09/12/1978 | US4112761 Liquid level measuring apparatus |
| 09/12/1978 | US4112760 Liquid level measuring device |
| 09/12/1978 | US4112759 Device for detecting the surface level of molten metal in a mold |
| 09/12/1978 | US4112758 Milk monitoring method and apparatus |
| 09/05/1978 | US4112318 Condition control system utilizing digital logic |
| 09/05/1978 | US4111047 Hydrostatic head pressure monitor with remote readout |
| 09/05/1978 | US4111044 Flow monitoring |
| 09/05/1978 | US4110909 Device for cleaning oil dipsticks |
| 09/05/1978 | CA1038060A1 Critical liquid-level warning circuit |
| 09/05/1978 | CA1038059A1 Liquid level gauging apparatus |
| 09/05/1978 | CA1038020A1 Toner level detector |
| 09/05/1978 | CA1037734A1 Temperature compensated liquid level transmitter |
| 09/05/1978 | CA1037679A1 Silo level measuring system |
| 08/29/1978 | US4110740 Liquid level detecting apparatus |
| 08/29/1978 | US4110617 Infra-red profilometer |
| 08/22/1978 | US4108000 Gauge glass protector |
| 08/22/1978 | US4107999 Automatic oil level maintaining system |
| 08/22/1978 | US4107998 Petrol tank gauges |
| 08/22/1978 | US4107997 Alloy sensor |
| 08/22/1978 | US4107994 Level detector |
| 08/22/1978 | US4107993 Method and apparatus for level measurement using microwaves |
| 08/15/1978 | US4107658 Liquid level detector circuits |
| 08/15/1978 | US4107494 Master cylinder reservoir with vacuum relief diaphragm and guarded fluid level sensor |
| 08/15/1978 | US4107493 Radiator cap |
| 08/15/1978 | US4106338 Water detector means for tank liquid level measuring system |
| 08/15/1978 | CA1036690A1 Apparatus for sensing variations in the heat exchange properties of a medium |
| 08/01/1978 | US4103641 Sight gauge device for flexible liquid carriers |
| 08/01/1978 | US4103552 In-service cleaning of a liquid level sensor |
| 08/01/1978 | US4103388 Oil dip stick wiper |
| 07/25/1978 | US4103292 Material sensing device |
| 07/25/1978 | US4103265 Fluid bilevel sensor |
| 07/25/1978 | US4102191 Digital fuel gauge |
| 07/18/1978 | US4101865 Sonic echo-sounder for the measurement of levels of substances |
| 07/18/1978 | US4101174 Slurry control system |
| 07/18/1978 | US4100680 Sensing the level of molten glass in a tank |
| 07/11/1978 | US4100538 Seed level sensor for automatic seed planting apparatus |
| 07/11/1978 | US4099461 Control device for controlling the level of a liquid in a container |
| 07/11/1978 | US4099332 Ullage gage |
| 07/04/1978 | US4099167 Capacitive means for measuring the level of a liquid |
| 07/04/1978 | US4098128 Method of and apparatus for monitoring slag thickness in refining crucible |
| 07/04/1978 | US4098119 Sight-glass adapter |
| 06/27/1978 | US4096759 Pressure gauge for indicating small pressure changes |
| 06/20/1978 | US4095476 Single scale U-type manometer |
| 06/13/1978 | US4095064 Paddle for use in a rotating-paddle bin level indicator |
| 06/13/1978 | US4094494 Furnace charge profile measuring process and apparatus |
| 06/06/1978 | US4092947 Oil level indicator for use with damping fluid metering pins |
| 06/06/1978 | US4092861 Liquid level measuring device |
| 06/06/1978 | US4092860 Level measurement and control |
| 05/30/1978 | US4091894 Automatic oil level maintaining system |
| 05/30/1978 | US4091671 Electronic fluid level sensor |
| 05/30/1978 | US4091670 Push-button operated meter |
| 05/30/1978 | US4091669 Pressure responsive apparatus |
| 05/23/1978 | US4091365 Sewer drain alarm unit |
| 05/23/1978 | US4091250 Electro-mechanical liquid level sensor |
| 05/23/1978 | US4090408 Fluid quantity indicator |
| 05/23/1978 | US4090407 Water level measurement device |
| 05/16/1978 | US4090050 Electro-mechanical liquid level sensor |
| 05/16/1978 | US4090049 Sealed reservoir for brake master cylinder |
| 05/09/1978 | US4088904 Capacitive transistorized signaling device |
| 05/09/1978 | US4088023 Liquid level gauge |
| 05/02/1978 | US4087706 Electronic level switch control setup |
| 05/02/1978 | US4087663 Liquid level contents indicators for vehicle hydraulic systems |
| 05/02/1978 | US4086812 Display device |
| 04/18/1978 | US4084547 Safe start checking liquid processing system |
| 04/18/1978 | US4084436 Fuel oil level measuring apparatus |
| 04/18/1978 | US4084435 System for measuring water level in gasoline tank |
| 04/11/1978 | US4083248 Digital liquid-level gauging systems |
| 04/04/1978 | US4083038 Condenser plate assembly |
| 04/04/1978 | US4082959 Liquid level detector |
| 04/04/1978 | US4082930 Liquid level sensor |
| 04/04/1978 | US4081889 Method for manufacturing an ultrasonic transducer |
| 03/28/1978 | US4081639 Liquid-level float switch construction |
| 03/28/1978 | US4080985 Water level alarm apparatus |
| 03/28/1978 | US4080828 Liquid level detecting apparatus |
| 03/21/1978 | US4080562 Apparatus for measuring capacitance or resistance and for testing a capacitance responsive gaging system |
| 03/21/1978 | US4079627 Absolute digital position measurement system |
| 03/14/1978 | US4078430 Dual liquid level indicating gauge |
| 03/07/1978 | US4077258 Method of determining liquid level in a petroleum cracking reactor |
| 03/07/1978 | US4077257 Depth Gauge |
| 02/28/1978 | US4075890 Device for detecting level of molten metal surface within a continuous casting mold |
| 02/14/1978 | US4074244 Audible-visual warning alarm system |