ClassID:

165335

G01F23/2922 - 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 by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material; Electromagnetic waves; Light, e.g. infra-red or ultra-violet for discrete levels with light-conducting sensing elements, e.g. prisms

Recent Application in this class:
#1
20260097587
2026-04-09

LIQUID CARTRIDGE

#2
20260069814
2026-03-12

APPARATUS AND METHOD FOR DETECTING LIQUID LEVEL IN A CLEAR OR PARTIALLY CLEAR CONTAINER

#3
20250313017
2025-10-09

LIQUID CARTRIDGE

#4
20240316940
2024-09-26

Liquid cartridge

#5
20240060812
2024-02-22

SENSOR DEVICE AND METHOD FOR DETERMINING AND/OR MONITORING A PROCESS VARIABLE OF A MEDIUM IN A CONTAINER

#6
20230355909
2023-11-09

APPARATUS AND METHOD FOR DETECTING LIQUID LEVEL IN A CLEAR OR PARTIALLY CLEAR CONTAINER

#7
20230341251
2023-10-26

RADAR LEVEL GAUGE SYSTEM HAVING AN ANTENNA ASSEMBLY WITH A NON-PLASTIC DIELECTRIC ANTENNA BODY

#8
20230271423
2023-08-31

Liquid cartridge

#9
20230204403
2023-06-29

Method for determining a lower boundary surface and/or an upper boundary surface of a liquid located in a container

#10
20230120490
2023-04-20

Apparatus and method for detecting liquid level in a clear or partially clear container

#11
20230066842
2023-03-02

APPARATUS FOR ACCUMULATING A FLUID

#12
20220341427
2022-10-27

Manual-automatic integrated self-adaptive pump with infrared water level detection function

#13
20220143357
2022-05-12

AN IMPROVED LIQUID RESERVOIR FOR A HUMIDIFIER, A MEDICAL DEVICE CONTAINING, A HUMIDIFIER CONTAINING, AND A METHOD THEREFOR

#14
20220113178
2022-04-14

Water softener salt monitoring system

#15
20220003590
2022-01-06

Method of operating an electro-optic liquid sensor to determine presence of liquid based on an amount of reflected light

#16
20210291542
2021-09-23

Liquid cartridge

#17
20210239508
2021-08-05

Electro-optic sensor

#18
20210003441
2021-01-07

Electro-optic liquid sensor

#19
20200269590
2020-08-27

Liquid cartridge

#20
20200232838
2020-07-23

Method of operating an electro-optic liquid sensor to determine presence of liquid based on an amount of reflected light

#21
20200165117
2020-05-28

Beverage supply apparatus

#22
20200121883
2020-04-23

Apparatus and method for detecting liquid level in a clear or partially clear container

#23
20200070534
2020-03-05

LIQUID CONTAINER, LIQUID CONSUMPTION DEVICE, AND METHOD OF CONTROLLING THE SAME

#24
20190217626
2019-07-18

Liquid cartridge

#25
20190170558
2019-06-06

Electro-optic liquid sensor enabling in-liquid testing

#26
20180164141
2018-06-14

Optical level sensor for wash aid removable container

#27
20180155671
2018-06-07

AIRCRAFT FUEL TANK WITH A VISUAL CONTROL SYSTEM INSIDE THE TANK, RELATED AIRCRAFT AND VISUAL CONTROL METHOD

#28
20180154644
2018-06-07

Liquid cartridge

#29
20180052034
2018-02-22

Method and device for monitoring an oil level in a machine

#30
20180031407
2018-02-01

Electro-optic liquid sensor with the use of reflected residual light to enable a test of the sensor

#31
20170173967
2017-06-22

Liquid cartridge

#32
20160202108
2016-07-14

Electro-optic liquid sensor enabling in-liquid testing having a light source providing a plurality of intensities for assessing an operational state of the sensor

#33
20150338343
2015-11-26

Silicon oil sensor and electric power terminal assembly

#34
20150241265
2015-08-27

Liquid consuming apparatus and method for controlling liquid consuming apparatus

#35
20150201466
2015-07-16

Heating device for domestic appliances with optical liquid-level sensor

#36
20150153213
2015-06-04

Visual indicator with sensor

#37
20140290357
2014-10-02

System and method for identifying levels or interfaces of media in a vessel

#38
20140264098
2014-09-18

Self-alignment filling level detecting device

#39
20140042345
2014-02-13

Visual indicator with sensor

#40
20130342828
2013-12-26

Aircraft shock strut having a fluid level monitor

#41
20130233047
2013-09-12

Liquid consumption device and liquid residual determination method

#42
20130068563
2013-03-21

Oil level indicator for a screw-type compressor

#43
20120236087
2012-09-20

INK CARTRIDGE FOR INKJET PRINTERS

#44
20120138779
2012-06-07

Liquid fuel tank for measuring fuel volume

#45
20120019838
2012-01-26

Sensor apparatus intended to detect the level of a liquid, gel or power substance contained in a receptacle

#46
20110087448
2011-04-14

Device for processing tissue samples

#47
20110074843
2011-03-31

Method of detecting residual quantity of ink, printing device, program and storage medium

#48
20100327884
2010-12-30

Liquid level and quality sensing apparatus, systems and methods using EMF wave propagation

#49
20100238239
2010-09-23

Liquid column member of liquid tank, liquid tank, and droplet discharge device

#50
20100017052
2010-01-21

Aircraft shock strut having a fluid level monitor

#51
20080266335
2008-10-30

Method of detecting residual quantity of ink

#52
20080144033
2008-06-19

OPTICAL LEVEL DETECTION PROBE FOR FLUID OVERFILL PREVENTION SYSTEM

#53
20070240627
2007-10-18

Fluid lever indicator protection sleeve

#54
20060187282
2006-08-24

Recording apparatus having a device for detecting the presence or absence of a liquid

#55
20060006353
2006-01-12

Optical transducer for continuously determining liquid level

#56
20050264623
2005-12-01

Recording apparatus having a device for detecting the presence or absence of a liquid

#57
20050236592
2005-10-27

Optical transducer for detecting liquid level and electrical circuit therefor

#58
20050151764
2005-07-14

Liquid level detection method and apparatus

#59
14677914
2016-03-29

Liquid level transducer with insertable quality sensor