ClassID:

165309

G01F23/22 - 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 by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water

Sub-classes:
Recent Application in this class:
#1
20260146884
2026-05-28

HEATED TEMPERATURE PROBE AND METHOD OF USING IN A FRYER VAT

#2
20260139578
2026-05-21

Thermochromic-Based Estimation Of Solid Accumulation Level In Well Fluid Separators

#3
20260133062
2026-05-14

Filling level measuring device

#4
20260110565
2026-04-23

CALCULATION METHOD OF KARST UNDERGROUND RESERVOIR CAPACITY CURVE BASED ON HYDROGEOLOGICAL PARAMETERS

#5
20260029730
2026-01-29

IMAGE FORMING APPARATUS

#6
20260022847
2026-01-22

MODULATING MAKEUP FLUID CONTROL SYSTEMS AND METHODS FOR SAME

#7
20250383224
2025-12-18

Systems and Methods for Fill Level Detection

#8
20250377232
2025-12-11

AUTOMATIONS DEVICE FOR MONITORING FIELD LEVEL SENSORS IN OIL AND GAS INDUSTRY

#9
20250352016
2025-11-20

HOPPER INDICATOR

#10
20250319542
2025-10-16

COOLANT LEVEL SENSING FOR TORCH SYSTEM

#11
20250312815
2025-10-09

HOT MELT ADHESIVE LEVEL SENSING DEVICE AND SYSTEM

#12
20250282079
2025-09-11

AXLE PRESSURE SETTING SYSTEMS AND METHODS

#13
20250216242
2025-07-03

DEVICE FOR STORING LIQUID, SYSTEM FOR PROCESSING SUBSTRATE, AND METHOD FOR IDENTIFYING LIQUID LEVEL

#14
20250189357
2025-06-12

FILL PROFILE CALCULATION AND OPTIMIZATION

#15
20250106942
2025-03-27

AEROSOL-GENERATING SYSTEMS WITH LIQUID LEVEL DETERMINATION AND METHODS OF DETERMINING LIQUID LEVEL IN AEROSOL-GENERATING SYSTEMS

#16
20250060133
2025-02-20

SENSOR SYSTEM AND INTEGRATED HEATER-SENSOR FOR MEASURING AND CONTROLLING PERFORMANCE OF A HEATER SYSTEM

#17
20250035476
2025-01-30

Method and Apparatus of Intelligent Water Shortage Detection and Management for Cooking Appliance

#18
20250020499
2025-01-16

DEVICE FOR THE INDIRECT MEASUREMENT OF THE FILL LEVEL OF A PRESSURIZED LIQUID IN A FLUID CONTAINER AND METHOD

#19
20250020498
2025-01-16

APPARATUS AND METHOD FOR MEASURING AMOUNT OF HYDROGEN STORED IN STORAGE CONTAINER

#20
20250010622
2025-01-09

WARMING DEVICE CAPABLE OF DETERMINING LOWERING OF WARMING FUNCTION, IMAGE FORMING APPARATUS, AND DETERMINATION METHOD

#21
20240385025
2024-11-21

VIBRONIC MULTISENSOR

#22
20240385024
2024-11-21

EXTERIOR GAUGE COMPONENT FOR FUEL LEVEL MONITORING THAT IS COMPATIBLE WITH DIFFERENT TANK GAUGE HEADS

#23
20240380198
2024-11-14

INTRINSICALLY SAFE CIRCUIT FOR LOAD

#24
20240325674
2024-10-03

HUMIDIFIED GASES DELIVERY APPARATUS AND METHODS FOR CONTROLLING SAME

#25
20240320870
2024-09-26

USING AUGMENTED REALITY TO VISUALIZE OPTIMAL WATER SENSOR PLACEMENT

#26
20240318994
2024-09-26

DETERMINING OPTIMAL WATER SENSOR PLACEMENT USING A MACHINE LEARNING CHATBOT

#27
20240210231
2024-06-27

Method and Device for Determining the Fuel Volume in a Fuel Container

#28
20240159406
2024-05-16

MODULATING MAKEUP FLUID CONTROL SYSTEMS AND METHODS FOR SAME

#29
20240132982
2024-04-25

RESIDUAL LIQUID AMOUNT DETECTION METHOD AND DETECTION APPARATUS FOR THE SAME, RESIDUAL MOLTEN MATERIAL AMOUNT DETECTION METHOD AND DETECTION APPARATUS FOR THE SAME, AND METHOD FOR OPERATING VERTICAL FURNACE

#30
20240125739
2024-04-18

VIBRATING FORK TYPE FIELD DEVICE WITH COIL ARRANGEMENT TO INDUCE VIBRATION

#31
20240118029
2024-04-11

LIQUID LEVEL DETECTION METHOD AND DETECTION APPARATUS FOR THE SAME, MOLTEN MATERIAL LIQUID LEVEL DETECTION METHOD AND DETECTION APPARATUS FOR THE SAME, AND METHOD FOR OPERATING VERTICAL FURNACE

#32
20240058989
2024-02-22

AXLE PRESSURE SETTING SYSTEMS AND METHODS

#33
20240003729
2024-01-04

METHOD AND SYSTEM FOR DETERMINING OVER TIME A LEVEL OF A PHASE INTERFACE OF A MULTIPHASE FLUID PRESENT IN A VERTICAL PIPE

#34
20230384141
2023-11-30

SPECIFYING SYSTEM, SPECIFYING APPARATUS, AND SPECIFYING METHOD

#35
20230366717
2023-11-16

SYSTEMS, METHODS AND TECHNIQUES FOR NON-LIQUID MATERIAL MONITORING

#36
20230296421
2023-09-21

Vibrating fork liquid level switch with verification

#37
20230168137
2023-06-01

OPTICAL SYSTEM FOR MEASURING WATER-OIL INTERFACE LEVEL FROM FLUID THERMAL PROPERTIES

#38
20230151819
2023-05-18

Submersible motor and method for mitigating water invasion to a submersible motor

#39
20230116575
2023-04-13

Sensor system and integrated heater-sensor for measuring and controlling performance of a heater system

#40
20230102658
2023-03-30

BEVERAGE DISPENSER WITH BEVERAGE-LEVEL INDICATOR

#41
20230046866
2023-02-16

Methods of improving accuracy and precision of droplet metering using an on-actuator reservoir as the fluid input

#42
20230035628
2023-02-02

Measuring device for detecting a filling or limit level of a filling material in a container and method for filling or emptying a container with or of a filling material

#43
20220373380
2022-11-24

Resistive wire wiring shield to prevent electromagnetic interference

#44
20220264199
2022-08-18

Systems and methods for improved asset monitoring via orientation measurement

#45
20220082484
2022-03-17

Characterization of a phase separation of a coating composition

#46
20220082428
2022-03-17

Vibrating fork level switches

#47
20220040439
2022-02-10

Humidified gases delivery apparatus and methods for controlling same

#48
20210396567
2021-12-23

Method and device for accurately monitoring evaporation capacity of water surface evaporator in whole process

#49
20210332994
2021-10-28

Modulating makeup fluid control systems and methods for same

#50
20210293600
2021-09-23

AEROSOL-GENERATING SYSTEM WITH ELECTRODES AND SENSORS

#51
20210276222
2021-09-09

Axle pressure setting systems and methods

#52
20210270659
2021-09-02

Sensing of a water level in refrigerated cabinets

#53
20210257140
2021-08-19

Actuating mechanism for object detection and object detection device

#54
20210251044
2021-08-12

Aerosol-generating systems with liquid level determination and methods of determining liquid level in aerosol-generating systems

#55
20210247224
2021-08-12

Fastening device for a field device

#56
20210123784
2021-04-29

Automations device for monitoring field level sensors in oil and gas industry

#57
20210080308
2021-03-18

Robot and method for calculating level of liquid in the liquid container

#58
20210063225
2021-03-04

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

#59
20210009402
2021-01-14

Beverage dispenser with beverage-level indicator

#60
20200413166
2020-12-31

ELECTRONIC DEVICE

#61
20200411233
2020-12-31

Temperature based fluid level estimation in an electrical device

#62
20200400483
2020-12-24

Systems, methods and apparatus for monitoring conditions of physical or virtual objects

#63
20200398290
2020-12-24

Methods of improving accuracy and precision of droplet metering using an on-actuator reservoir as the fluid input

#64
20200378815
2020-12-03

SOLID LEVEL MEASUREMENT WITH VIBRATING ROD SENSORS

#65
20200348163
2020-11-05

Fluid sensing

#66
20200319009
2020-10-08

Sensor arrangement for arrangement on a process installation, and method for operating the sensor arrangement and process installation

#67
20200284639
2020-09-10

LIQUID LEVEL DETECTION IN RECEPTACLES USING A PLENOPTIC CAMERA TO MEASURE THE SURFACE TOPOGRAPHY OF THE LIQUID

#68
20200240825
2020-07-30

NON-METALLIC LIQUID LEVEL SENSOR ELECTRODE

#69
20200096405
2020-03-26

Miniature size force sensor with bubble detection capabilities

#70
20200088561
2020-03-19

Liquid level meter, vaporizer equipped with the same, and liquid level detection method

#71
20200033176
2020-01-30

FUEL TANK LEVEL MONITORING SYSTEM

#72
20190373344
2019-12-05

Electronic device

#73
20190338236
2019-11-07

Method and apparatus for continuous automated perfusion system harvesting from in-situ filtration probe

#74
20190293470
2019-09-26

Methods for safe operation of a cooktop appliance

#75
20190293329
2019-09-26

Liquid level detection device and refrigeration cycle apparatus

#76
20190285458
2019-09-19

Fluid measurement interface systems and methods

#77
20190271732
2019-09-05

Method and measuring assembly for monitoring a line

#78
20190226899
2019-07-25

Method of operating a liquid-level transmitter device and implementation thereof

#79
20190217044
2019-07-18

Humidified gases delivery apparatus and methods for controlling same

#80
20190186977
2019-06-20

Level sensor kit for use with a liquid storage tank, system incorporating same, and methods of using same

#81
20190178696
2019-06-13

FUEL TANK LEVEL MONITORING SYSTEM

#82
20190162575
2019-05-30

Tank gauge

#83
20190154200
2019-05-23

System and method for detecting a lubricant-out condition in an aircraft gearbox

#84
20190137423
2019-05-09

Sensor for detecting immersion in F.O.G. or water

#85
20190137316
2019-05-09

Detecting fluid levels using a voltage comparator

#86
20190128767
2019-05-02

Frequency sub-band leak detection

#87
20190118545
2019-04-25

Fluid level sensing dependent on write command

#88
20190118527
2019-04-25

Detecting a level of printable fluid in a container

#89
20190090469
2019-03-28

Arthropod repellent or attractant liquid reservoir with fill indicator

#90
20190060923
2019-02-28

Methods of improving accuracy and precision of droplet metering using an on-actuator reservoir as the fluid input

#91
20190047019
2019-02-14

Excitation signal sequences for ultrasonic transducer

#92
20190032958
2019-01-31

Sensor system and integrated heater-sensor for measuring and controlling performance of a heater system

#93
20190017857
2019-01-17

Liquid level detection in receptacles using a plenoptic camera to measure the surface topography of the liquid

#94
20190011306
2019-01-10

Liquid level indicating

#95
20180321073
2018-11-08

Oil level sensor tank for turbine engine

#96
20180321071
2018-11-08

Liquid level sensing and diagnostic determination

#97
20180299314
2018-10-18

Integrated sensor unit for fuel gauging

#98
20180250491
2018-09-06

Electrical heater with particular application to humidification and fluid warming

#99
20180242644
2018-08-30

Aerosol-generating system with electrodes and sensors

#100
20180234748
2018-08-16

Electronic device

#101
20180203379
2018-07-19

Fluid storage device

#102
20180180310
2018-06-28

Modulating makeup fluid control systems and methods for same

#103
20180171843
2018-06-21

Method and a system for evaluating an effective component content of a reducing agent

#104
20180120140
2018-05-03

Fill level switch arrangement and method for determining the fill level of a medium

#105
20180113019
2018-04-26

Information processing apparatus, information presentation apparatus, information presentation system, and recording medium

#106
20180106657
2018-04-19

Fuel tank level monitoring system

#107
20180100756
2018-04-12

Liquid surface position detection device

#108
20180100753
2018-04-12

Liquid level indicating

#109
20180064869
2018-03-08

Device and Method for Dispensing Fluid from an Infusion Pump

#110
20180058960
2018-03-01

Apparatus and method for wire length compensation in servo gauge for inventory management application

#111
20170350107
2017-12-07

Overflow system for a fluid container

#112
20170335751
2017-11-23

Monitoring engine coolant

#113
20170327949
2017-11-16

Liquid level indicator and liquid raw material vaporization feeder

#114
20170320576
2017-11-09

GREY WATER INTERFACE VALVE LIQUID LEVEL SENSOR SYSTEM

#115
20170314982
2017-11-02

E-11 switch assembly

#116
20170276535
2017-09-28

Refrigeration cycle apparatus and liquid level detection sensor

#117
20170252684
2017-09-07

Filter element having projecting bayonet-type protrusion

#118
20170248460
2017-08-31

System and method for measuring liquid levels having a fiber with a strain layer around a Bragg grating

#119
20170245551
2017-08-31

Aerosol-generating systems with liquid level determination and methods of determining liquid level in aerosol-generating systems

#120
20170234818
2017-08-17

Wireless sensing devices and method for detecting hydration

#121
20170232505
2017-08-17

Apparatus, method, and program for detecting molten metal surface level in continuous casting mold

#122
20170227392
2017-08-10

Apparatus and method for liquid level measurement and content purity measurement in a sounding tube

#123
20170219406
2017-08-03

METHOD FOR MONITORING THE FILLING OF RAILWAY TANK CARS

#124
20170211960
2017-07-27

Liquid reservoir with a plurality of liquid level detection units

#125
20170200362
2017-07-13

Fuel tank level monitoring system

#126
20170200361
2017-07-13

Fuel tank level monitoring system

#127
20170199069
2017-07-13

Fuel tank level monitoring system

#128
20170198468
2017-07-13

Toilet with flush jet fill tube flow meter

#129
20170198464
2017-07-13

Optical proximity sensor based toilet with fill tube proximity level sensing

#130
20170152103
2017-06-01

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

#131
20170144449
2017-05-25

Method and device for detecting ink leakage in an inkjet printing machine

#132
20170097295
2017-04-06

METHOD FOR DETERMINING SUSPENDED MATTER LOADS CONCENTRATIONS IN A LIQUID

#133
20170072769
2017-03-16

Dispensing canister apparatus with thermochromic clip

#134
20170051958
2017-02-23

Portable refrigerant charge meter and method for determining the actual refrigerant charge in HVAC systems

#135
20170003155
2017-01-05

Thermal dispersion mass flow rate, material interface, and liquid level sensing transducer

#136
20160375217
2016-12-29

Humidified gases delivery apparatus and methods for controlling same

#137
20160319816
2016-11-03

Compressor having oil-level sensing system

#138
20160282167
2016-09-29

SYSTEM AND METHOD OF OPERATOR INDICATION FOR FILLING REDUCTANT TANK

#139
20160273952
2016-09-22

Liquid level detector for open vessel and closed vessel

#140
20160270595
2016-09-22

Oil level detection system for deep fat fryer

#141
20160255429
2016-09-01

AUDIO SIGNAL AMPLIFICATION APPARATUS AND METHOD OF USE

#142
20160238432
2016-08-18

Apparatuses and methods for monitoring stall of motors

#143
20160186929
2016-06-30

Lubricant reservoir low level indicator

#144
20160186740
2016-06-30

Electronic pump motor control

#145
20160175859
2016-06-23

Methods of improving accuracy and precision of droplet metering using an on-actuator reservoir as the fluid input

#146
20160131565
2016-05-12

METHOD OF DETERMINING A FILL LEVEL OF AN OSCILLATOR OF AN OSCILLATOR TUBE, AND OSCILLATOR TUBE

#147
20150362353
2015-12-17

Method and device for determining the filling mass of a cryogenically stored gas in a container

#148
20150348701
2015-12-03

Conductivity and impedance sensor

#149
20150330577
2015-11-19

Expansion tank with a predictive sensor

#150
20150313387
2015-11-05

Apparatus for providing contents and method for the same

#151
20150292932
2015-10-15

Liquid level detection device and refrigeration cycle

#152
20150233753
2015-08-20

PRODUCT LEVEL MONITORING IN A CHEMICAL DISPENSING SYSTEM

#153
20150218667
2015-08-06

Method and device for measuring levels of cast iron and slag in a blast furnace

#154
20150204598
2015-07-23

PORTABLE CRYOGENIC WORKSTATION

#155
20150117136
2015-04-30

Magnetic stirrer with a temperature measuring device

#156
20150096367
2015-04-09

Systems and Methods for Measuring Levels of Liquids of Different Densities in Containers

#157
20150059469
2015-03-05

Method and apparatus for remotely monitoring liquid food products

#158
20150052996
2015-02-26

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

#159
20150047429
2015-02-19

Apparatus for detecting fluid temperature and level in a container

#160
20150040660
2015-02-12

Liquid level sensing apparatus and method

#161
20150040311
2015-02-12

Grey water interface valve liquid level sensor system

#162
20140373607
2014-12-25

Apparatus for Determining and/or Monitoring at least one Process Variable

#163
20140367408
2014-12-18

FRAGRANCE DEVICE WITH FRAGRANCE AMOUNT INDICATOR

#164
20140360260
2014-12-11

Fuel level inference from canister temperatures

#165
20140352694
2014-12-04

Electrical heater with particular application to humidification and fluid warming

#166
20140347194
2014-11-27

SYSTEM, METHOD, AND DEVICE FOR MEASURING AND REPORTING CHANGING LEVELS OF LIQUIDS IN STORAGE TANKS

#167
20140169807
2014-06-19

Systems and methods for measuring a particulate material

#168
20140137645
2014-05-22

Fluid level sensor system and method

#169
20140085049
2014-03-27

Magnetic field communication arrangement and method

#170
20140074301
2014-03-13

Controlling device

#171
20140053640
2014-02-27

Sensor device for detecting flowable media, a pressure device and a measuring method

#172
20140035604
2014-02-06

Device and method for dispensing fluid from an infusion pump

#173
20140022094
2014-01-23

Magnetic field communication arrangement and method for monitoring the presence of vechicles

#174
20140015658
2014-01-16

Magnetic field communication arrangement and method for a tractor-trailer

#175
20140008536
2014-01-09

Method for quantifying amorphous content in bulk metallic glass parts using thermal emissivity

#176
20140007672
2014-01-09

System for a Deep Water-Well Gauge

#177
20130328552
2013-12-12

Electromagnetic pushing and knocking-type object detector

#178
20130276549
2013-10-24

Method and apparatus for the measurement of flow in gas or oil pipes

#179
20130269431
2013-10-17

Liquid level detecting device

#180
20130261812
2013-10-03

APPARATUS AND METHODS FOR MONITORING A HOT WATER TANK OF A HOT WATER HEATING SYSTEM TO IMPROVE ITS ENERGY EFFICIENCY

#181
20130182742
2013-07-18

Sensing device for detecting material depth, liquid-level, and temperature

#182
20130174841
2013-07-11

Humidified gases delivery apparatus and methods for controlling same

#183
20130161023
2013-06-27

Standalone liquid level sensing apparatus for tensioner system

#184
20130160541
2013-06-27

Method and device for detecting the tank filling level in a motor vehicle

#185
20130139585
2013-06-06

Device for determining and/or monitoring at least one predetermined fill level

#186
20130124107
2013-05-16

Fuel tank contaminant prediction

#187
20130108474
2013-05-02

System and method for sensing a liquid level

#188
20130083883
2013-04-04

POOL LEVEL INDICATION SYSTEM

#189
20130018605
2013-01-17

Estimating fluid levels in a progressing cavity pump system

#190
20120326880
2012-12-27

Low oil indication

#191
20120324995
2012-12-27

System and method for product level monitoring in a chemical dispensing system

#192
20120283950
2012-11-08

Determination and control of wellbore fluid level, output flow, and desired pump operating speed, using a control system for a centrifugal pump disposed within the wellbore

#193
20120281096
2012-11-08

STORAGE TANK INSPECTION SYSTEM AND METHOD

#194
20120279316
2012-11-08

Method and apparatus for the measurement of flow in gas or oil pipes

#195
20120226450
2012-09-06

Method and system for determining an amount of a liquid energy commodity in storage in an underground cavern

#196
20120195770
2012-08-02

Determination and control of wellbore fluid level, output flow, and desired pump operating speed, using a control system for a centrifugal pump disposed within the wellbore

#197
20120090392
2012-04-19

Sealing device for a device for measuring the fill level in a fluid container

#198
20120035880
2012-02-09

System for measurement of molten sulfur level in receptacles

#199
20120010846
2012-01-12

High spatial resolution fiber optic temperature sensor

#200
20110140918
2011-06-16

Magnetic field communication arrangement and method

#201
20110106452
2011-05-05

Determination and control of wellbore fluid level, output flow, and desired pump operating speed, using a control system for a centrifugal pump disposed within the wellbore

#202
20110088465
2011-04-21

Method and device for monitoring the fill level of a liquid in a liquid container

#203
20110081256
2011-04-07

System and method for sensing a liquid level

#204
20110063628
2011-03-17

Apparatus and method for measuring the liquid level of molten metal

#205
20110053780
2011-03-03

Cryogen Level Probe

#206
20110023598
2011-02-03

Electrical heating element and method of measuring a filling level

#207
20110018723
2011-01-27

Fluid level detection system

#208
20100284000
2010-11-11

Method and apparatus for distributed sensing utilizing optical scattering in optical waveguides

#209
20100281971
2010-11-11

Fluid condition and level sensor

#210
20100206067
2010-08-19

Hydraulic monitoring unit

#211
20100150737
2010-06-17

Determination and control of wellbore fluid level, output flow, and desired pump operating speed, using a control system for a centrifugal pump disposed within the wellbore

#212
20100147299
2010-06-17

Electrical heater with particular application to humidification and fluid warming

#213
20100107886
2010-05-06

Method for determining the liquid level in a boiler

#214
20100032593
2010-02-11

System and method of determining fluid levels in containers including an infrared device for detecting a first value associated with an empty portion of a container

#215
20100001417
2010-01-07

FRAGRANCE DEVICE WITH FRAGRANCE AMOUNT INDICATOR

#216
20090320569
2009-12-31

Adjustable height liquid level management tools and systems

#217
20090308154
2009-12-17

Fuel Cartridge Structure with Sensor Apparatus

#218
20090301186
2009-12-10

Engine oil level detecting device

#219
20090293608
2009-12-03

Apparatus for measuring a filling level

#220
20090019931
2009-01-22

Detection device making it possible to measure the quantity of hot water remaining in a storage reservoir

#221
20090007652
2009-01-08

OPTICAL SENSOR FOR MEASURING DOWNHOLE INGRESS OF DEBRIS

#222
20080271949
2008-11-06

Lubrication-condition detector, lubricant feeder, injection molding machine and method of detecting lubrication-condition

#223
20080250851
2008-10-16

Integrated oil condition and level sensor

#224
20080134777
2008-06-12

Single threshold liquid level sensor

#225
20080125983
2008-05-29

Method for monitoring fluid levels in a tank

#226
20080120036
2008-05-22

Well characterisation method

#227
20080107151
2008-05-08

Multi-function sensor

#228
20080067116
2008-03-20

Determination and control of wellbore fluid level, output flow, and desired pump operating speed, using a control system for a centrifugal pump disposed within the wellbore

#229
20080035647
2008-02-14

Expansion tank with a predictive sensor

#230
20080035303
2008-02-14

Expansion tank with alarm system

#231
20080016960
2008-01-24

Liquid level sensor using thick film substrate

#232
20070264153
2007-11-15

Color changing dipstick

#233
20070251960
2007-11-01

Measurement of molten sulfur level in receptacles

#234
20070214881
2007-09-20

LIQUID LEVEL DETECTION DEVICE AND THE METHOD THEREOF

#235
20070195855
2007-08-23

FILLING LEVEL SENSOR AND ASSOCIATED OPERATING METHOD AND MANUFACTURING PROCESS AND CORRESPONDING USAGE

#236
20070163780
2007-07-19

Method and system for monitoring the incursion of particulate material into a well casing within hydrocarbon bearing formations including gas hydrates

#237
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2007-07-12

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