| Patents for G05D 9 - Level control, e.g. controlling quantity of material stored in vessel (4,688) |
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| 06/10/2009 | CN101452296A Sewerage liquid-level controller |
| 06/04/2009 | WO2008044017A3 Process control architecture with hydrodynamic correction |
| 06/04/2009 | US20090139584 Valve Assembly With Overfill Protection Device And Capacitive Liquid Level Gauge |
| 06/03/2009 | CN201251714Y Controller for detection of water level in water tank |
| 06/03/2009 | CN100495277C Novel composite position controller |
| 06/02/2009 | US7542824 Air conditioning control device |
| 05/27/2009 | CN201245891Y Water chamber type toilet bowl |
| 05/27/2009 | CN201245869Y Secondary utilizing system of collective dormitory washing waste water |
| 05/27/2009 | CN101441483A Liquid level control apparatus of liquid storing tank of beverage mixing machine |
| 05/27/2009 | CN101441004A Integrated solar water feeding alarm |
| 05/27/2009 | CN100491655C Automatic controller for pressure differential water storage tank water level |
| 05/20/2009 | CN201242689Y Automatic water level controller |
| 05/20/2009 | CN201242688Y Water quantity storage controller |
| 05/20/2009 | CN101435423A Apparatus for thermal dissipation and retention of float |
| 05/14/2009 | US20090125152 Method of measurement, control, and regulation for the solar thermal hybridization of a fossil fired rankine cycle |
| 05/13/2009 | CN201237742Y Operation-free light-control solar water delivery apparatus |
| 05/13/2009 | CN201236381Y Municipal drainage pump station collecting well fluid level control energy-saving apparatus |
| 05/13/2009 | CN201236355Y Water storage control device of water tower |
| 05/13/2009 | CN201234497Y Automatic control device for irrigation water level of paddy field |
| 05/13/2009 | CN101429781A Water saving controller |
| 05/06/2009 | CN201233540Y Safe starting apparatus for water processing motor |
| 05/06/2009 | CN201233539Y 水位开关传感器 Level switch sensor |
| 05/06/2009 | CN201232226Y Automatic controller of water tower liquid surface |
| 05/06/2009 | CN201230500Y Paddy-field irrigation water-level automatic control device |
| 05/06/2009 | CN101424093A Household reclaimed water system |
| 04/30/2009 | WO2009052943A1 Arrangement and process for providing a liquid mixture which is preferably variable with time |
| 04/29/2009 | EP2053482A2 Device for controlling water level |
| 04/29/2009 | CN201229501Y Photoelectric material level controller |
| 04/29/2009 | CN201228372Y Bathroom water reuse apparatus |
| 04/29/2009 | CN101419471A Device for controlling water level |
| 04/29/2009 | CN101419470A Self-adjusting liquid level control device |
| 04/23/2009 | US20090100882 Controlling method of a steam generator and a laundry machine with the same |
| 04/22/2009 | CN201226106Y Domestic water-basin water-level automatic controller |
| 04/22/2009 | CN201224902Y Full-automatic water saving device |
| 04/22/2009 | CN201224893Y Rainwater runoff control apparatus |
| 04/22/2009 | CN201222917Y Water-level control apparatus for irrigated land |
| 04/22/2009 | CN101413820A Method and apparatus for detecting and controlling liquid level by float ball |
| 04/15/2009 | EP2047346A1 Non-contact type water level control apparatus |
| 04/15/2009 | CN201222722Y Contactless switch for liquid level control |
| 04/15/2009 | CN201222200Y Controller for resistance rotary material position |
| 04/15/2009 | CN201222199Y Side-installed floating ball liquid level controller |
| 04/14/2009 | US7519439 Efficient digital processor for feedback control applications |
| 04/14/2009 | US7518266 Method and apparatus for improving AC transmission system dispatchability, system stability, and power flow controllability using DC transmission systems |
| 04/09/2009 | WO2009044001A1 Device for controlling the flow of a liquid and method using said device |
| 04/08/2009 | CN201218918Y Conditional liquid level controller |
| 04/08/2009 | CN101403930A Continuous casting crystallizer fluid level control method based on Fuzzy-PID |
| 04/02/2009 | DE202007016085U1 Vorrichtung zur Messung des Schmieröldruckes in der Ölwanne eines Verbrennungsmotors Device for measuring the oil pressure in the oil pan of an internal combustion engine |
| 04/02/2009 | DE10122230B4 Verfahren und Vorrichtung zur Regelung des Flüssigkeitshaushalts einer Verdunstungsanlage Method and apparatus for controlling the fluid balance an evaporation plant |
| 04/01/2009 | CN201215630Y Full-automatic liquid level controller |
| 04/01/2009 | CN201215629Y Practical water level controller |
| 04/01/2009 | CN201215407Y Automatic water supply device of solar energy water heater |
| 03/31/2009 | US7509974 Metallic ball for a ballcock |
| 03/25/2009 | CN201212184Y Toilet-flushing device with domestic secondary water |
| 03/25/2009 | CN201211512Y Eupatorium fortunei automatic atomizer |
| 03/25/2009 | CN101393462A Automatic water supply device |
| 03/25/2009 | CN101393461A Radio frequency admittance admittance level controller |
| 03/24/2009 | US7509190 Method for administering an intermittent uncontrollable electric power generating facility |
| 03/19/2009 | US20090076631 Configuring a physical condition at a source to obtain a desired physical condition at destination |
| 03/18/2009 | EP2035899A1 Adaptive pitch control for variable speed wind turbines |
| 03/18/2009 | CN201210258Y Automatic closing overflow tube device by symmetrical floating force method |
| 03/12/2009 | US20090069947 Systems and methods for providing portion control programming in a product forming dispenser |
| 03/11/2009 | CN201206262Y Secondary using device for domestic sewage |
| 03/11/2009 | CN201206259Y Float ball apparatus |
| 03/11/2009 | CN101383499A Water level detecting control protector of water pump for mining |
| 03/11/2009 | CN100467726C Aseptic water tank with safe liquid level meter |
| 03/06/2009 | CA2639317A1 Apparatus for measuring and/or controlling liquid levels |
| 03/04/2009 | CN201203807Y Automatic controller for liquid level |
| 03/04/2009 | CN201203806Y Self-draining arrangement for oil tank bottom water |
| 03/04/2009 | CN201202147Y Solar energy household sewerage recycling apparatus |
| 03/04/2009 | CN100465393C An automatic drainage device of underground proton device machine rooms |
| 02/26/2009 | WO2009024204A2 Method and apparatus for determining a switching point for filling level regulation |
| 02/26/2009 | DE102007039557A1 Verfahren und Vorrichtung zum Bestimmen eines Schaltpunkts für eine Füllstandsregulierung Method and apparatus for determining a switching point for a level regulation |
| 02/25/2009 | CN201199331Y Liquid level controller |
| 02/25/2009 | CN201199169Y Multi-polar inductance type liquid-level meter |
| 02/25/2009 | CN201197317Y Mechanism for regulating overflow mouth applied for fluid level control device of aquarium |
| 02/25/2009 | CN101372837A Household water-saving system |
| 02/25/2009 | CN101371652A Method for automatically compensating water for water supply tank of automatic drinking system for feeding chicken |
| 02/25/2009 | CN100464040C Automatic waste water reclamation system |
| 02/19/2009 | US20090044935 Method and arrangement for optimizing heat transfer properties in heat exchange ventilation systems |
| 02/18/2009 | EP2026045A2 Device for determining the amount of hot water remaining |
| 02/18/2009 | CN101369156A Liquid level control method and system for effusion pit in mineral wool slab production by wet method shaping |
| 02/18/2009 | CN101368393A High-rise housing pond pumping method and its control circuit |
| 02/18/2009 | CN101367120A Liquid level height control system for continuous directional solidification apparatus |
| 02/12/2009 | DE202007013480U1 Vorrichtung zur Überwachung gegen Überfüllung speziell bei Verladung von schäumenden Medien Apparatus for monitoring overfilling especially for loading of foaming media |
| 02/11/2009 | CN201194242Y Water level control device for fuel cell gas-liquid separation tank |
| 02/11/2009 | CN201193351Y Domestic waste recovery device |
| 02/11/2009 | CN101365995A Booster-powered valve system |
| 02/11/2009 | CN101364114A Liquid level on-line control system and method for self-adapting and fuzzy logic PID crystallizer |
| 02/11/2009 | CN101363331A Method for producing power utilizing natural heat energy and prime move |
| 02/11/2009 | CN101363234A Device for recovering and shunting rain water |
| 02/10/2009 | US7489986 Spa controller computer interface for spas |
| 02/05/2009 | US20090035189 sterilizer includes vacuum chamber, source of vaporizable sterilant, vacuum pump, and control system; programmed to take one or more data inputs regarding the nature of the load, such as lumen length and diameter |
| 02/04/2009 | CN201190325Y Intelligent water saving toilet-flushing device |
| 02/04/2009 | CN201190308Y Sewage recovery device |
| 02/04/2009 | CN201188804Y Automatic bottom-irrigation system of potted plant |
| 02/04/2009 | CN101358464A Urine circulation flushing latrine system |
| 02/04/2009 | CN100458304C Double-pipe type solar water heater in model of instant use once to turn it on |
| 01/28/2009 | CN201188194Y Electric apparatus for controlling water level |
| 01/28/2009 | CN201187768Y Small-sized heat supply stove |
| 01/28/2009 | CN201187074Y Public dormitory waste water utilization system |