| Patents for G05D 9 - Level control, e.g. controlling quantity of material stored in vessel (4,688) |
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| 06/15/2011 | CN201867659U Intelligent water level control device of condenser for pure-low-temperature waste heat generation in cement mill |
| 06/15/2011 | CN201867658U Automatic liquid reservoir |
| 06/15/2011 | CN101364114B Liquid level on-line control system and method for self-adapting and fuzzy logic PID crystallizer |
| 06/14/2011 | US7962248 Methods, systems, circuits, and computer program products for reducing peak electrical demand by shifting activation of electrical appliances |
| 06/08/2011 | CN201859354U Water level control device for silicon slice cleaning tank |
| 06/08/2011 | CN101103322B Electrically controlled pressure relief valve |
| 06/01/2011 | CN201854005U Integrated gas filling protective system for cable |
| 06/01/2011 | CN201853140U Water tower water level automatic controller |
| 06/01/2011 | CN201853139U Automatic control device for ore pulp storage hopper |
| 05/31/2011 | US7953518 Energy cost reduction and ad delivery |
| 05/25/2011 | CN201845240U Novel automatic controller for liquid level |
| 05/18/2011 | CN201837901U Fully automatic water level controller |
| 05/18/2011 | CN201837900U 智能液位显示控制器 Intelligent level display controller |
| 05/18/2011 | CN201837899U Anti-explosion water level controller with high-power load |
| 05/18/2011 | CN1906553B Apparatus and method for operating a valve using a cushion filter |
| 05/18/2011 | CN101566387B Water boiler with novel water level control device |
| 05/11/2011 | CN201828837U Pneumatic level controller |
| 05/11/2011 | CN201828836U Water level automatic control system of flood discharge gate |
| 05/11/2011 | CN201828835U Float ball liquid level controller for boat |
| 05/11/2011 | CN201828678U Automatic rain gauge |
| 05/11/2011 | CN201824035U Automatic control system for controlling machining liquid level of low-speed silk thread-tracking cutting-off machine |
| 05/11/2011 | CN201822634U Water cup capable of automatically controlling water level and water dispenser using same |
| 05/11/2011 | CN101684661B Two-way control water supply device |
| 05/11/2011 | CN101560971B Pump unit energy efficiency automatic control system and control method thereof |
| 05/10/2011 | US7941246 Automatic generation control augmentation for wind plant integration |
| 05/05/2011 | US20110106317 Integrated resource monitoring system with interactive logic control |
| 05/04/2011 | CN201820152U Liquid level measuring and controlling system for brick making machine |
| 05/04/2011 | CN201820151U Liquid level protection alarm device |
| 05/04/2011 | CN201820150U Radio-frequency admittance material level controller |
| 05/04/2011 | CN102042856A Device and method for automatically metering and calibrating horizontal tank capacity based on standard metal tank |
| 05/04/2011 | CN101486018B Centrifugal machine level controller |
| 05/04/2011 | CN101368393B High-rise housing pond pumping method and its control circuit |
| 05/04/2011 | CN101218884B Case type low pressure high volume pressure regulator |
| 04/27/2011 | CN201812212U Rotary paddle level switch |
| 04/27/2011 | CN201812211U Liquid level control device for transistor |
| 04/27/2011 | CN201812210U Water tank controller |
| 04/27/2011 | CN102033552A Intelligent control system for engineering dewatering |
| 04/27/2011 | CN102029649A Automatic control method of well-cementing cement mixing operation |
| 04/26/2011 | US7933689 Method for controlling at least one load connected to a primary and a backup power supply |
| 04/26/2011 | US7933688 Electrically controlled pressure relief valve and system and method for controlling same |
| 04/20/2011 | EP2312413A1 Fuel filtration monitoring system |
| 04/20/2011 | CN201804277U 自动水位控制器 Automatic Water Level Controller |
| 04/20/2011 | CN201804276U Simple water level controller for circuit |
| 04/20/2011 | CN201804275U Full-automatic water level controller |
| 04/20/2011 | CN102023652A Liquid level controller for water tank |
| 04/20/2011 | CN102023651A Method and device for controlling flotation cell liquid level |
| 04/20/2011 | CN101419471B Device for controlling water level |
| 04/16/2011 | CA2715296A1 Method and apparatus for detection of phase separation in storage tanks |
| 04/13/2011 | CN201796301U Water level wireless controller for water tower |
| 04/13/2011 | CN201796300U 电子式水位控制器 Electronic Water Level Controller |
| 04/13/2011 | CN102012685A Automatic charging and drying control device based on PLC (Programmable Logic Controller) control |
| 04/13/2011 | CN101205564B Molten iron loading amount control method of ironcored ladle car |
| 04/06/2011 | CN201788421U Full-auto water level control system |
| 04/06/2011 | CN201788420U Adjustable tube structure for oil level controller |
| 04/06/2011 | CN201788419U Integral oil return adjusting structure |
| 04/06/2011 | CN201788418U Automatic material transfer control device |
| 04/06/2011 | CN201788406U Automatic control device for water levels of multiple canal reaches |
| 04/06/2011 | CN102004502A Liquid level control system and control method of Intermediate tank in glutinous rice wine production |
| 04/06/2011 | CN102004501A Water level control device for silicon wafer cleaning tank |
| 04/06/2011 | CN102001494A Off-site assembled container manufacturing method, bag-type pressure drain tank and liquid level controller |
| 04/05/2011 | US7920934 Manufacturing system and controller, controlling method, controlling system, and control program for the manufacturing system |
| 03/29/2011 | US7917787 Method, apparatus and system to dynamically choose an aoptimum power state |
| 03/29/2011 | US7917252 Load controlling device, load controlling method, load controlling circuit, load controlling program, and computer-readable recording medium where load controlling program is recorded |
| 03/29/2011 | CA2586137C Electrically controlled pressure relief valve |
| 03/29/2011 | CA2361096C Spa controller computer interface for spas |
| 03/23/2011 | EP2297625A1 Sump monitoring method and apparatus |
| 03/23/2011 | CN201773329U Ball float level controller |
| 03/23/2011 | CN201773328U Liquid dangerous chemistry materials charging excess alarm interlocking device |
| 03/23/2011 | CN201773327U Marine side-mounted floating ball liquid level controller |
| 03/23/2011 | CN201773326U Multipoint water level control device of photovoltaic water pump |
| 03/23/2011 | CN201771039U Water-saving closestool capable of controlling flushing water quantity |
| 03/17/2011 | US20110066296 Method and Apparatus for Control of an Electric Power Distribution System in Response to Circuit Abnormalities |
| 03/16/2011 | CN201766340U Drier with improved structure for aerating and maintaining system |
| 03/16/2011 | CN201765518U Liquid level controller |
| 03/16/2011 | CN201765517U Remote wireless controller for liquid level of water tank |
| 03/16/2011 | CN201765516U Water controller using municipal alternating current as test signals |
| 03/16/2011 | CN201765515U Intelligent sewage level controller |
| 03/16/2011 | CN201765514U Float ball liquid level controller for ship |
| 03/16/2011 | CN201762763U Water level controller with over-voltage protection |
| 03/16/2011 | CN201762446U Automatic water level controller preventing electrode electrolysis |
| 03/16/2011 | CN201758647U Reflow control device for deep liquid flow soilless cultivation |
| 03/15/2011 | US7908035 System and method for wind formulary |
| 03/08/2011 | US7904208 Computer instructions for centralized management of a hydrogen generation network |
| 03/08/2011 | US7902307 Olefin polymerization process with optimized product discharge |
| 03/08/2011 | US7902306 Polyolefin production using high olefin concentration |
| 03/01/2011 | US7897113 Multicompartment apparatus comprising membrane films which utilize electro-osmosis and immunoglobulin recognition to detect particles in solution |
| 02/24/2011 | WO2011020905A1 Gravity-fed basin |
| 02/23/2011 | EP2287413A1 Gravity-fed basin |
| 02/16/2011 | CN201749373U Water level controller without ionizing electrolysis water |
| 02/16/2011 | CN201749372U Automatic water level control alarm |
| 02/16/2011 | CN201749371U Level controller |
| 02/16/2011 | CN201748154U Large gasifier liquid-level control system |
| 02/16/2011 | CN201747612U Condensed water discharger of air compressor |
| 02/15/2011 | US7890217 Integrated real-time power and solar farm control system |
| 02/10/2011 | WO2011015529A2 Warm water reservoir having a device for determining the warm water fill level of the warm water reservoir |
| 02/09/2011 | CN201741044U Ultrasonic liquid level monitoring device |
| 02/09/2011 | CN201741043U Liquid level control device |
| 02/09/2011 | CN201738394U Secondary utilization system for wastewater |
| 02/09/2011 | CN201738374U Water saving device |
| 02/08/2011 | US7885917 Utility monitoring and disaggregation systems and methods of use |