| Patents for G05D 9 - Level control, e.g. controlling quantity of material stored in vessel (4,688) |
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| 06/24/1998 | CN2284948Y Thermal-conductivity type liquid level measuring controller |
| 06/03/1998 | CN2283274Y 电子水位传感器 Electronic level sensor |
| 05/28/1998 | DE19728280A1 Probe for continuous measurement of liquid level in container e.g. system |
| 05/20/1998 | CN2282216Y Fixed level continuous liquid feeder |
| 05/19/1998 | US5752788 System and method of pumping a constant volume of powder |
| 05/19/1998 | US5752498 Elliptical beam load cell |
| 05/13/1998 | CN2281560Y Optic fiber level alarming and controlling apparatus |
| 05/06/1998 | CN2280943Y Intelligent oil-water interface automatic monitoring-controlling device |
| 05/06/1998 | CN2280942Y Intelligent liquid-level automatic monitoring-controlling device |
| 04/29/1998 | CN2280309Y Testing and measuring automatic control device for protecting pump fom being lack of water |
| 04/22/1998 | CN2279640Y Automatic adding device for liquid by immersion and discharge method |
| 04/22/1998 | CN2279639Y Float barrel type container fluid level automatic controller |
| 04/21/1998 | US5742500 Pump station control system and method |
| 04/16/1998 | WO1998015762A1 Automatic regulating valve apparatus |
| 04/08/1998 | CN2278240Y 水位显示控制器 Level display controller |
| 04/08/1998 | CN2278239Y Water level controller |
| 04/01/1998 | CN2277535Y Self-control liquid-level gauge |
| 03/25/1998 | CN2277095Y Wholly senclosed difference vacuum liquid level controller |
| 03/24/1998 | US5731994 Method of packing particles into vessels and apparatus therefor |
| 03/18/1998 | EP0829792A1 Water distributing installation controllers |
| 02/25/1998 | EP0740757A4 Chemical refill system for high purity chemicals |
| 01/28/1998 | EP0820611A1 Pneumatic (underpressure) liquid level regulation |
| 01/27/1998 | US5711354 Level control systems for high purity chemical delivery systems |
| 01/21/1998 | CN2273024Y 自动供水控制器 Automatic water supply controller |
| 01/14/1998 | CN2272590Y Multi-setting type liquid level controller |
| 01/14/1998 | CN2272589Y Automatic-releasing liquid level controller |
| 01/13/1998 | US5706660 Method and system for automatically controlling a solid product delivery mechanism |
| 01/07/1998 | CN2272145Y Plummet level self-controller |
| 12/24/1997 | CN2271213Y Electric controlled switch for domestic running water |
| 12/23/1997 | US5700401 Liquid auto-level apparatus and method |
| 12/17/1997 | CN2270985Y Automatic control protector for distilled water device |
| 12/10/1997 | CN2270300Y Multipurpose controller |
| 12/09/1997 | CA2052405C Fluid flow control and isolation |
| 12/04/1997 | WO1997045664A1 A fill system control apparatus |
| 11/20/1997 | DE19619777A1 Device for automatically maintaining liquid level for IC engines e.g. for automobile industry |
| 11/12/1997 | CN1036420C High-temp. high-pressure dye groove shape's microcomputer control system |
| 10/23/1997 | WO1997039285A1 Fuzzy logic liquid level control |
| 10/22/1997 | EP0802362A1 Liquid level regulator with servocontrolled valve for reservoirs |
| 10/22/1997 | CN2265555Y Automatic liquid level controller |
| 10/15/1997 | CN2264927Y Level controller |
| 09/30/1997 | US5672050 Apparatus and method for monitoring a sump pump |
| 09/30/1997 | US5671603 Apparatus for controlling level of cryogenic liquid |
| 09/30/1997 | US5671562 Liquid level control device |
| 09/24/1997 | CN2263362Y Water-level controller |
| 09/23/1997 | CA2132601C Overflow detection system |
| 09/17/1997 | CN2262713Y Single-wire liquid level monitor |
| 08/20/1997 | CN2260337Y Full automatic water level control device |
| 08/14/1997 | WO1997029412A1 Pneumatic (underpressure) liquid level regulation |
| 08/13/1997 | CN1156821A Thermal conductance type liquid level measuring controller |
| 08/07/1997 | WO1997028400A1 Method and device for drawing condensate off from compressed-gas systems |
| 08/06/1997 | CN1156245A 可编程序水位测控仪 Programmable Level Monitor |
| 07/31/1997 | DE19645815A1 Compressed air system condensate removal method |
| 07/29/1997 | US5651934 Recoating of stereolithographic layers |
| 07/02/1997 | CN2257386Y Floating ball fluid level controller |
| 06/24/1997 | US5641006 Liquid supply apparatus and method of operation |
| 06/17/1997 | US5639380 System for automating groundwater recovery controlled by monitoring parameters in monitoring wells |
| 06/10/1997 | US5636762 System and method for dispensing liquid from storage containers |
| 06/04/1997 | EP0777078A1 Apparatus for controlling level of cryogenic liquid |
| 06/04/1997 | CN2255625Y Liquid-level controller |
| 05/15/1997 | WO1997017584A1 Condensate removal device on a condensate generating apparatus |
| 05/15/1997 | WO1997012151A3 Sanitary aseptic drain system |
| 04/23/1997 | EP0769662A1 Method for controlling the water level and the presence of foam in immersed-electrode humidifiers |
| 04/23/1997 | CN2253003Y Pressure differential self-regulating liquid level controller |
| 04/16/1997 | CN2252360Y Control device with pumping water full automatic interruption of power supply |
| 04/16/1997 | CN1147644A Inside-plugging tank water level controller |
| 04/09/1997 | CN1147056A Liquid level monitoring arrangement |
| 04/03/1997 | WO1997012151A2 Sanitary aseptic drain system |
| 04/03/1997 | DE19536391A1 Container filling level regulation device |
| 03/19/1997 | CN2249918Y Level controller of water tank |
| 03/18/1997 | US5612227 Liquid boundary detecting method and apparatus and liquid removing method and apparatus |
| 03/12/1997 | CN2249422Y Liquid-level auto-control device |
| 03/11/1997 | US5609729 Apparatus for controlling liquid level in a knot drainer |
| 03/05/1997 | CN2248885Y Magnetic floating ball type device for automatically controlling liquid level |
| 03/04/1997 | US5607002 Chemical refill system for high purity chemicals |
| 02/26/1997 | CN2248351Y Full-automatic water level controller |
| 02/19/1997 | CN2247826Y Infrared sound and light double-limit liquid level alarm controller |
| 02/05/1997 | CN2246818Y Leakless control valve of sanitary wares |
| 02/04/1997 | CA2015178C Method regulating the level of a mixture of flowable material made up of at least two components in a container having an outlet |
| 01/30/1997 | WO1997003394A1 Liquid level control system |
| 01/29/1997 | CN2246305Y Liquid level gauge controlled by ball valve |
| 01/22/1997 | EP0754951A1 Liquid supply systems |
| 01/22/1997 | CN2245778Y Antijamming monitoring device for fluid level monitor |
| 01/14/1997 | CA2178046A1 Liquid supply apparatus and method of operation |
| 01/08/1997 | CN2244740Y Liquid level auto-controlling valve with magnetizer |
| 01/07/1997 | US5591010 Time shift control of wastewater pumping system |
| 01/07/1997 | US5590695 Manifold systems for high purity chemical delivery systems |
| 01/02/1997 | EP0750523A1 Upper phase removal method and device |
| 01/01/1997 | CN2244212Y Electronic water level automatic controller |
| 11/26/1996 | US5578198 Device for automatic regulation of the process of separating froth concentrate from gangue in a floatation machine |
| 11/26/1996 | CA2091483C Hydroelectric plant draft tube water level control |
| 11/21/1996 | DE19609426A1 Automatic method for drawing beer from barrel |
| 11/07/1996 | DE19516213A1 Wet material storage control procedure for offset printing machine |
| 11/06/1996 | EP0740757A1 Chemical refill system for high purity chemicals |
| 10/23/1996 | CN2238451Y Controller for liquid level and charge level |
| 10/16/1996 | CN2237862Y Liquid level auto-controller |
| 10/16/1996 | CN2237861Y Liquid level auto-controller |
| 10/08/1996 | US5562132 Bulk containers for high purity chemical delivery systems |
| 09/25/1996 | EP0613545B1 Process for setting, controlling and monitoring the level in a refrigerant evaporator |
| 09/10/1996 | US5555456 Reconfigurable fault control apparatus |
| 09/10/1996 | US5553636 Watering through fill valve control |