ClassID:

165282

G01F23/0007 - CPC Classification

Classification description:

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 for discrete indicating and measuring

Sub-classes:
Recent Application in this class:
#1
20260139978
2026-05-21

DEVICE AND METHOD FOR MEASURING FLUID FLOW AND PRESSURE UNDER HYPER-GRAVITY ENVIRONMENT

#2
20260133065
2026-05-14

CONTAINER LEVEL DETECTOR

#3
20260132891
2026-05-14

FILLING LEVEL MONITORING DEVICE FOR MONITORING THE FILLING LEVEL OF A FLUID CONTAINER, HYDROGEN TANK, AND AIRCRAFT COMPRISING SUCH HYDROGEN TANK

#4
20260049400
2026-02-19

CHEMICAL SOURCE VESSEL WITH DIP TUBE

#5
20260022847
2026-01-22

MODULATING MAKEUP FLUID CONTROL SYSTEMS AND METHODS FOR SAME

#6
20260018637
2026-01-15

GAS FLOW RATE MEASUREMENT FOR REDOX FLOW BATTERY SYSTEMS AND OTHER CLOSED SYSTEMS AND METHODS OF MAKING AND USING

#7
20250383223
2025-12-18

LIQUID LEVEL DETECTOR

#8
20250354849
2025-11-20

Fuel Tank Level Sensor Device

#9
20250292665
2025-09-18

VISUAL INDICATION OF TANK LEVEL AND PERFORMANCE

#10
20250291037
2025-09-18

LIGHT DETECTION AND RANGING (LIDAR) DEVICE HAVING A TELECENTRIC LENS ASSEMBLY

#11
20250284300
2025-09-11

INTERNET OF THINGS (IOT) SYSTEMS, METHODS, AND STORAGE MEDIA FOR SMART GAS PIPELINE PRESSURE DIFFERENCE SAFETY MONITORING

#12
20250256224
2025-08-14

SAND SEPERATION CONTROL SYSTEM AND METHOD

#13
20250231059
2025-07-17

LEVEL INDICATOR SYSTEM USING LIGHTS

#14
20250201089
2025-06-19

VISUAL INDICATION OF TANK LEVEL AND PERFORMANCE

#15
20250070577
2025-02-27

BATTERY COMPARTMENT AND BATTERY SWAP STATION

#16
20250067616
2025-02-27

MODULAR SENSOR FUSION PLATFORM FOR HYDROCARBON STORAGE EQUIPMENT MONITORING

#17
20250067589
2025-02-27

SYSTEMS AND METHODS FOR VISION-BASED MEASUREMENT OF LIQUID LEVEL IN CONTAINERS HAVING LINEAR SCALES

#18
20240418554
2024-12-19

Material Indicating Gauge

#19
20240417965
2024-12-19

SHOWER DRAIN DEVICES, SHOWER DRAIN SYSTEMS, AND METHODS OF MANUFACTURING AND USING THE SAME

#20
20240360561
2024-10-31

CONTROL OF LIQUID DELIVERY IN AUTO-REFILL SYSTEMS

#21
20240351557
2024-10-24

LIQUID LEVEL SENSING FOR WASHER FLUID RESEVOIR

#22
20240326455
2024-10-03

LIQUID CONTAINER, INK CARTRIDGE, AND LIQUID DISCHARGE APPARATUS

#23
20240263986
2024-08-08

Removable signaling device of the exhaustion of a dispenser/diffuser of liquid active substances

#24
20240255326
2024-08-01

APPARATUS AND METHODS FOR OPEN CHANNEL FLOW MEASUREMENT OF PROCESS FLUIDS

#25
20240192043
2024-06-13

SYSTEM, METHOD AND APPARATUS FOR LADING MEASUREMENT IN A RAIL CAR

#26
20240167864
2024-05-23

Systems and Methods for Detecting Water Hazard Conditions Proximate to a Structure

#27
20240159406
2024-05-16

MODULATING MAKEUP FLUID CONTROL SYSTEMS AND METHODS FOR SAME

#28
20240151571
2024-05-09

SYSTEMS AND METHODS FOR TANK LEVEL MONITORING

#29
20240150207
2024-05-09

Septic Sludge Alarm Assembly

#30
20240142294
2024-05-02

METHOD FOR DETECTING THE PRESENCE OF A LIQUID

#31
20240044688
2024-02-08

SUMP PUMP FAILURE DEVICE

#32
20240044687
2024-02-08

Level meter and method of setting the level meter

#33
20240035224
2024-02-01

APPARATUS, SYSTEM, AND METHOD OF PROVIDING A LIQUID LEVEL MONITOR

#34
20240029527
2024-01-25

Visual indication of tank level and performance

#35
20240027254
2024-01-25

TANK COMPRISING A DEVICE FOR MEASURING THE LEVEL OF FLUID, AND CORRESPONDING MEASURING METHOD

#36
20240024801
2024-01-25

SAND SEPARATION CONTROL SYSTEM AND METHOD

#37
20230407480
2023-12-21

Chemical source vessel with dip tube

#38
20230366716
2023-11-16

TELEMETRIC FITTING AND METHOD OF TELEMETRIC MEASUREMENT

#39
20230296482
2023-09-21

AUTOMATED AEROSOL SAMPLER

#40
20230296420
2023-09-21

Systems and Methods for Monitoring Contents in an Asset

#41
20230222642
2023-07-13

INUNDATION DAMAGE DETERMINATION DEVICE, INUNDATION DAMAGE DETERMINATION METHOD, AND PROGRAM

#42
20230221162
2023-07-13

LN2 fill gauge level indicating device

#43
20230194325
2023-06-22

SYSTEMS AND METHODS FOR DETECTING FILL-LEVELS IN CROP TRANSPORT RECEPTACLES USING SWITCH-BASED SENSORS

#44
20230175879
2023-06-08

BUCKET WITH INTERIOR MEASUREMENT MARKINGS

#45
20230160772
2023-05-25

Systems and methods for detecting water leaks and/or preventing waste water overflow

#46
20230160741
2023-05-25

SHIP WEIGHING SYSTEM AND SHIP WEIGHING METHOD

#47
20230148571
2023-05-18

POULTRY FEEDER LINE SENSOR TUBE OVERFLOW

#48
20230081396
2023-03-16

Method for indicating exchange of a fuel vapor absorber and a vehicle with an indicator therefore

#49
20230060411
2023-03-02

Systems and methods for tank level monitoring

#50
20230035669
2023-02-02

Fluid Output Measurement and Analysis System

#51
20220364900
2022-11-17

Vehicle liquid level tank sensing system and related methods

#52
20220333968
2022-10-20

System, method and apparatus for lading measurement in a rail car

#53
20220316933
2022-10-06

Method and system for remotely monitoring wastewater in manhole of underground drainage network and alerting

#54
20220316214
2022-10-06

Roof drain overflow cover with sensor

#55
20220299043
2022-09-22

Household submersible pump

#56
20220282421
2022-09-08

Apparatus, system, and method of providing a liquid level monitor

#57
20220282379
2022-09-08

Control of liquid delivery in auto-refill systems

#58
20220268618
2022-08-25

Water leak/water flow detection system

#59
20220268617
2022-08-25

Intelligent measurement cup including laser detection unit electrically connected to main control circuit board

#60
20220251984
2022-08-11

Method and system for checking an oil level in a marine drive unit

#61
20220228354
2022-07-21

TOILET OVERFLOW PREVENTION SYSTEM AND METHOD

#62
20220187114
2022-06-16

Liquid sensor

#63
20220147931
2022-05-12

Method and system for controlling unloading of a load-carrying vehicle

#64
20220144165
2022-05-12

Boat trailer depth indicator module

#65
20220143619
2022-05-12

SENSOR POSITIONING SYSTEM FOR A BIOPROCESS ENGINEERING INSTALLATION

#66
20220082660
2022-03-17

Light Detection and Ranging (Lidar) Device having a Light-Guide Manifold

#67
20220082096
2022-03-17

Sump pump failure device

#68
20220075092
2022-03-10

Apparatus and method for real-time monitoring of groundwater level and soil moisture of gully head landfill area

#69
20220047970
2022-02-17

Sand separation control system and method

#70
20220026121
2022-01-27

In-situ oil circulation ratio measurement system for vapor compression cycle systems

#71
20210403201
2021-12-30

Liquid supply system

#72
20210387608
2021-12-16

Method and device for ascertaining an available fluid volume, braking system

#73
20210341329
2021-11-04

Oil monitoring system and method and a rotary meter with oil monitoring system

#74
20210332994
2021-10-28

Modulating makeup fluid control systems and methods for same

#75
20210318158
2021-10-14

System, method and apparatus for lading measurement in a rail car

#76
20210318157
2021-10-14

System, method and apparatus for lading measurement in a rail car

#77
20210310482
2021-10-07

System for monitoring concrete pumping systems

#78
20210270658
2021-09-02

Parameterization of a field device

#79
20210270657
2021-09-02

Level sensor or point level sensor with temperature compensation

#80
20210262188
2021-08-26

Detecting and alleviating flooding and blocked storm sewers

#81
20210252431
2021-08-19

AUTOMATED SAND DETECTION AND HANDLING SYSTEM FOR OIL AND GAS WELL OPERATIONS

#82
20210223071
2021-07-22

ENERGY EFFICIENT ELECTROMECHANICAL DISLAY FOR GAUGES

#83
20210205735
2021-07-08

Sand separation control system and method

#84
20210140810
2021-05-13

Arrangement for detection of the amount of material in a supply container of a machine for application of material to a field

#85
20210123788
2021-04-29

OMNIPOLAR MAGNETIC SWITCH WITH AXIALLY MAGNETIZED MAGNET ASSEMBLY FOR IMPROVED PRECISION

#86
20210096014
2021-04-01

Dual-probe fluid sensor assembly

#87
20210096006
2021-04-01

Rotating base and flange assembly for a fluid sensor assembly

#88
20210079637
2021-03-18

Toilet overflow prevention system and method

#89
20210063225
2021-03-04

System and method for measuring soil or sediment level and monitoring hydraulic damage

#90
20200406809
2020-12-31

Towable Fluid Storage Tank Trailer

#91
20200378049
2020-12-03

METHODS AND SYSTEM FOR MONITORING AND REPLENISHING ONE OR MORE LAUNDRY COMPONENTS

#92
20200363077
2020-11-19

Air conditioner installation plate and air conditioner

#93
20200356144
2020-11-12

Electronic device for confirming whether submergence has occurred by using submergence sensing circuit, and operating method of electronic device

#94
20200354836
2020-11-12

Chemical source vessel with dip tube

#95
20200305674
2020-10-01

CLEANLINESS MONITORING

#96
20200262644
2020-08-20

Fluid evaluation devices for oil and gas applications

#97
20200225072
2020-07-16

Telemetric fitting and method of telemetric measurement

#98
20200209016
2020-07-02

Grease interceptor level analyzer

#99
20200165117
2020-05-28

Beverage supply apparatus

#100
20200158553
2020-05-21

METHOD TO PREDICT REMAINING TIME AND EXPECTED CONSUMPTION BEFORE A FLUID SYSYTEM REACHES A LOW FLUID LEVEL

#101
20200082354
2020-03-12

SMART WASTE MANAGEMENT SYSTEM

#102
20200080881
2020-03-12

Product inventory monitoring

#103
20200054116
2020-02-20

HYDRATION SLEEVE AND BLADDER AND RELATED SYSTEMS AND METHODS

#104
20200033175
2020-01-30

Fluid level sensing system and method

#105
20200003601
2020-01-02

FLUID LEVEL SENSOR

#106
20200003218
2020-01-02

Volumetric real time flow engine

#107
20190339106
2019-11-07

Portable liquid level gauge for buckets

#108
20190337735
2019-11-07

METHOD FOR GRANULAR RESIN MATERIAL DELIVERY USING FILL TIME MONITORING AND ALARM FOR FILTER CHECK

#109
20190323220
2019-10-24

Toilet overflow prevention system and method

#110
20190277224
2019-09-12

Rocket tank liquid level determination, and associated systems and methods

#111
20190251822
2019-08-15

Flood detection device and method

#112
20190200456
2019-06-27

Printed circuit board and sensor

#113
20190171996
2019-06-06

System for automatically monitoring a supply of a consumable product, replenishing the supply, and methods of use

#114
20190145812
2019-05-16

LIQUID DETECTION APPARATUS

#115
20190131670
2019-05-02

Electrolyte level sensing system and method for battery monitoring

#116
20190118545
2019-04-25

Fluid level sensing dependent on write command

#117
20190082596
2019-03-21

System and method for sensing harvested crop levels within an agricultural harvester

#118
20190066400
2019-02-28

FUEL MAINTENANCE GUIDE SYSTEM FOR VEHICLE

#119
20190063985
2019-02-28

Method for operating a limit sensor

#120
20190063977
2019-02-28

Soap dispensing device having soap replenishing notification function

#121
20190041252
2019-02-07

Liquid-surface detection device

#122
20190031364
2019-01-31

FUELLING METHOD

#123
20190020190
2019-01-17

Power electronics installation

#124
20190017859
2019-01-17

Bin level indicator

#125
20180370496
2018-12-27

Vehicle cleaning

#126
20180364089
2018-12-20

System for measuring level of a precursor in a container

#127
20180364088
2018-12-20

Determining a waste water filling level in a vehicle tank, measuring arrangement and waste water arrangement

#128
20180348037
2018-12-06

Liquid level detecting device

#129
20180340812
2018-11-29

System for and a method of monitoring water drainage

#130
20180321072
2018-11-08

Apparatus, system, and method of providing a liquid level monitor

#131
20180313675
2018-11-01

Liquid level sensor with improved removability

#132
20180298798
2018-10-18

REAL TIME FLUID LEVEL MONITORING SYSTEM

#133
20180282988
2018-10-04

Toilet overflow prevention system and method

#134
20180238729
2018-08-23

Telemetric fitting and method of telemetric measurement

#135
20180216985
2018-08-02

ADVANCED FLOOD GAUGE

#136
20180216357
2018-08-02

Wet screed hardware apparatus

#137
20180203379
2018-07-19

Fluid storage device

#138
20180195913
2018-07-12

Transparent ceramic composition

#139
20180180310
2018-06-28

Modulating makeup fluid control systems and methods for same

#140
20180169328
2018-06-21

DRUG MONITORING DEVICE FOR INTRAVENOUS INFUSION AND THE METHOD THEREOF

#141
20180162636
2018-06-14

Electronics assembly for wireless transmission of at least one status information

#142
20180143019
2018-05-24

Precision Hydrostatic Level and Flatness Measuring Devices, Systems and Methods

#143
20180136029
2018-05-17

Apparatuses, systems, and methods for determining fluid levels in objects

#144
20180136027
2018-05-17

Tank level indication system with a lighted handrail

#145
20180128670
2018-05-10

Level switches

#146
20180094961
2018-04-05

System, method and apparatus for lading measurement in a rail car

#147
20180080807
2018-03-22

Universal dispenser monitor

#148
20180070543
2018-03-15

Method for maintaining soil moisture for a garden via a sump pump

#149
20180052033
2018-02-22

Low Salt Alert System

#150
20180045548
2018-02-15

Apparatus and method for measuring a volume of a liquor dispensed from a bottle

#151
20180035603
2018-02-08

Arrangement for detection of the amount of material in a supply container of a machine for application of material to a field

#152
20180031405
2018-02-01

Intelligent vehicle fuel gauge

#153
20180028038
2018-02-01

Cleanliness monitoring

#154
20170352266
2017-12-07

ADVANCED FLOOD GAUGE

#155
20170350745
2017-12-07

Liquid level detection device, method of detecting liquid level, high temperature plasma raw material supply device and extreme ultra violet light source device

#156
20170314985
2017-11-02

Method and system for monitoring a state

#157
20170305646
2017-10-26

DISPENSING CONTAINER

#158
20170292839
2017-10-12

Composite hydrological monitoring system for detecting scour depth, water level and flow velocity

#159
20170292798
2017-10-12

LEAK DETECTION IN HEAT EXCHANGER SYSTEMS

#160
20170269053
2017-09-21

SYSTEM AND METHOD FOR PROCESSING PETROLEUM

#161
20170233993
2017-08-17

Toilet overflow prevention system and method

#162
20170227391
2017-08-10

Monitoring systems and methods

#163
20170205268
2017-07-20

FUEL MONITORING SYSTEM AND METHOD

#164
20170202343
2017-07-20

Hydration sleeve and bladder and related systems and methods

#165
20170176235
2017-06-22

Systems and methods for liquid level detection with optoelectronic interfaced dual thermistor bead sensor

#166
20170152103
2017-06-01

Overfill and fluid level indicators for use on flexible collapsible liquid tanks

#167
20170122607
2017-05-04

Air conditioner and control method thereof

#168
20170122606
2017-05-04

Air conditioner and control method thereof

#169
20170115155
2017-04-27

Self-contained, buoyant, and water-tight wireless flood detector

#170
20170106387
2017-04-20

PISTON HAVING AN INDICIUM

#171
20170102255
2017-04-13

Mass flowmeter and velocimeter

#172
20170089340
2017-03-30

Compressor having oil-level sensing system

#173
20160334259
2016-11-17

Secure gasoline storage tank gauge monitoring system

#174
20160319816
2016-11-03

Compressor having oil-level sensing system

#175
20160311410
2016-10-27

VEHICLE REFUELING SYSTEM AND METHOD USING FUEL SENSORS, GLOBAL POSITIONING SYSTEM SENSORS, WIRELESS ANTENNAS, AND ELECTRONIC ALARM AND FUEL LOCK CONTROLS

#176
20160292990
2016-10-06

Low salt alert system

#177
20160272066
2016-09-22

Vehicle having wade sensing display and system therefor

#178
20160245678
2016-08-25

Control system for application of liquid or solid material

#179
20160216147
2016-07-28

Bin level inicator

#180
20160169669
2016-06-16

Precision hydrostatic level and flatness measuring device, system and method

#181
20160159379
2016-06-09

DATA COMMUNICATION SYSTEM FOR LOCOMOTIVE CONSIST

#182
20160121713
2016-05-05

Method for operating a fuel tank system for an automobile and corresponding fuel tank system

#183
20160031599
2016-02-04

Splash shield for a fluid containment system of a vehicle

#184
20150362350
2015-12-17

External Sensing Device for Machine Fluid Status and Machine Operation Status

#185
20150330577
2015-11-19

Expansion tank with a predictive sensor

#186
20150323369
2015-11-12

Constant Fluid Level and Equipment Monitor

#187
20150300908
2015-10-22

Rotorcraft actuator seal leakage monitor

#188
20150253174
2015-09-10

Liquid detection apparatus

#189
20150152759
2015-06-04

Water drain system for oil reserve tank

#190
20150115158
2015-04-30

Photoelectric-type continuous liquid level measurement method and device

#191
20150102933
2015-04-16

SERVICE DISPLAY SYSTEM FOR A MACHINE

#192
20150059470
2015-03-05

Measuring device for measuring property of fuel inside fuel tank

#193
20150052996
2015-02-26

Filling level sensor with several thermoelements and method for measuring the filling level

#194
20150047428
2015-02-19

Apparatus for monitoring a predetermined fill level

#195
20150040816
2015-02-12

Fluid level indicator

#196
20140373622
2014-12-25

WIRELESS FUEL SENSOR

#197
20140361887
2014-12-11

Self-contained, buoyant, and water-tight wireless flood detector

#198
20140360263
2014-12-11

Multi-limit level measuring device

#199
20140345150
2014-11-27

Precision hydrostatic level and flatness measuring device, system and method

#200
20140320278
2014-10-30

DUTY CYCLE BASED LIQUID LEVEL DETECTION SYSTEM FOR A DRIVELINE COMPONENT

#201
20140251005
2014-09-11

Connected Tableware for Quantifying Dietary Intake

#202
20140230718
2014-08-21

Liquid reduction timing device

#203
20140203630
2014-07-24

Oil level indicator for rotary wing aircraft transmission

#204
20140002275
2014-01-02

Bridge safety monitoring integrated system with full optical fiber and the method for sensing thereof

#205
20130328552
2013-12-12

Electromagnetic pushing and knocking-type object detector

#206
20130327140
2013-12-12

Device for measuring liquid filling levels

#207
20130314235
2013-11-28

Sewer backup alarm

#208
20130314209
2013-11-28

IDENTIFYING FLUID SUPPLIED THROUGH HOSE

#209
20130314206
2013-11-28

Verifying identification of sequentially supplied fluids

#210
20130305986
2013-11-21

Liquid Crystal Suction Device and Liquid Crystal Coating Equipment

#211
20130247291
2013-09-26

Toilet overflow prevention system and method

#212
20130230303
2013-09-05

Fluid heater and method of use thereof

#213
20130105002
2013-05-02

Circulating liquid bath with dual reservoir level switch

#214
20130073237
2013-03-21

Submersion detection circuit and submersion detection apparatus using the same

#215
20130037566
2013-02-14

MONITOR FOR PARTICULATE MATTER IN DISPENSING CONTAINER

#216
20130032248
2013-02-07

Fluid flow control valve with upper bleed port and system

#217
20120326880
2012-12-27

Low oil indication

#218
20120245792
2012-09-27

Portable truck tester

#219
20120204636
2012-08-16

Buoyancy force-based liquid level measurement

#220
20120111106
2012-05-10

VIBRATING ELEMENT APPARATUS

#221
20120037657
2012-02-16

Method for Discontinuously Emptying a Container

#222
20120023654
2012-02-02

Toilet overflow prevention system and method

#223
20120022672
2012-01-26

Apparatus for reducing or minimizing disturbance signals in the case of a field device of process automation

#224
20110301867
2011-12-08

Fluid flow measurement with phase-based diagnostics

#225
20110234716
2011-09-29

Liquid cartridge and liquid supplying device

#226
20110226359
2011-09-22

FLUID RESERVOIR WITH LIGHT SOURCE

#227
20100269587
2010-10-28

Low liquid level detecting device and method

#228
20100162812
2010-07-01

Liquid level monitoring apparatus and methods

#229
20100141460
2010-06-10

Acoustic fluid presence/absence detection

#230
20100122575
2010-05-20

Fluid level indicator strip

#231
20100095447
2010-04-22

Toilet overflow prevention system and method

#232
20100085198
2010-04-08

Immersion detection

#233
20100011854
2010-01-21

Sand level monitoring system

#234
20090325658
2009-12-31

Monitoring of bin level for an agricultural product

#235
20090165494
2009-07-02

Dispensing system and method for dispensing fluid in an appliance

#236
20090047184
2009-02-19

Reaction tank

#237
20090007659
2009-01-08

Container with functions of level, crud and temperature detections

#238
20080178670
2008-07-31

Low emission, fixed maximum liquid level gauge and valve

#239
20080168836
2008-07-17

Low liquid level detecting device and method

#240
20080141447
2008-06-19

Toilet overflow prevention system and method

#241
20080138475
2008-06-12

Method of establishing the integrity of a product located in a container

#242
20080061240
2008-03-13

Testing the integrity of products in containers

#243
20080035647
2008-02-14

Expansion tank with a predictive sensor

#244
20080035303
2008-02-14

Expansion tank with alarm system

#245
20070234796
2007-10-11

Liquid level detector

#246
20070209979
2007-09-13

Urine diverter with end of life cycle indicator

#247
20070193650
2007-08-23

Method and apparatus for accurately delivering a predetermined amount of fuel to a vehicle

#248
20070103322
2007-05-10

Stored material detecting switch

#249
20070034003
2007-02-15

Water-level control device having power frequency carrier

#250
20060281000
2006-12-14

Battery electrolyte level control system

#251
20060272203
2006-12-07

Adjustable float tree

#252
20060245863
2006-11-02

Solid state detection system for measuring high levels in grain bins

#253
20060151362
2006-07-13

Septic Tank Fluid Level Signal

#254
20060130592
2006-06-22

Method and apparatus for a product displacement sensing device

#255
20050174245
2005-08-11

System for monitoring water within a bathtub

#256
20050099284
2005-05-12

External device indicating that a tank is filled up

#257
20050088308
2005-04-28

Bathtub water level monitoring system

#258
17219235
2023-07-18

Bin material measurement

#259
17067735
2023-01-10

Group electronic game or poll using beverage sensors

#260
16984143
2022-03-15

Electronic vibrating plumb bob for the detection of differing fluids in tanks and vessels

#261
16207124
2020-10-13

Electronic game with integrated beverage sensor

#262
15704475
2018-12-11

Automatic liquid soap supplying system

#263
15611689
2019-01-29

Arcade game with integrated beverage sensor

#264
15490881
2018-05-01

Liquid level gauge for pressurized tanks

#265
14860988
2017-10-10

Septic overflow warning system

#266
14451797
2016-07-05

Material level sensor

#267
13347689
2015-02-03

Remote monitoring of stratified layers in grease interceptors