| Patents for G05D 9 - Level control, e.g. controlling quantity of material stored in vessel (4,688) |
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| 05/08/2013 | CN202929490U Liquid level controlling device of lower part water outflow water tower or container |
| 05/08/2013 | CN202925527U Weir gate capable of controlling water level automatically |
| 05/08/2013 | CN103084232A Circulating Liquid Bath With Reservoir Dual Level Switch |
| 05/07/2013 | US8435684 Hydrogen producing apparatus, method of operating hydrogen producing apparatus and fuel cell power generating system |
| 05/01/2013 | CN202916715U An accumulated water monitoring and warning system |
| 05/01/2013 | CN202916714U Liquid level detection and maintaining system |
| 05/01/2013 | CN103076819A Liquid level control device and data processing |
| 05/01/2013 | CN103076818A Liquid level control device |
| 05/01/2013 | CN102298870B System used for skill training and assessment of PLC control technology |
| 04/30/2013 | US8433453 Electric power leveling controller |
| 04/30/2013 | CA2708798C Switch and float assembly for a pump |
| 04/25/2013 | WO2013059565A1 Modular electronic carbonator fluid level control mechanism |
| 04/24/2013 | CN202904389U Water level control circuit |
| 04/24/2013 | CN202904388U Automatic water level controller |
| 04/24/2013 | CN202904387U Water tank system |
| 04/24/2013 | CN202904386U A liquid level control device |
| 04/24/2013 | CN202904385U Water tank water-feeding controller |
| 04/24/2013 | CN202899227U Impounding reservoir liquid level device control system |
| 04/24/2013 | CN202898210U Intelligent control system for sludge dehydrator |
| 04/24/2013 | CN103064436A Liquid level control method of saline water storage device |
| 04/24/2013 | CN103064435A Bolt type flow setting device |
| 04/24/2013 | CN103064434A Hydropower station differential pressure measurement and monitor device |
| 04/24/2013 | CN102103370B Slot and level control method of sintering mixture |
| 04/23/2013 | US8428787 Electronic device and power management method thereof |
| 04/23/2013 | US8428783 Method and system for distributed energy generator message aggregation |
| 04/23/2013 | US8427336 Monitoring of undesirable fluid ingress into subsea control modules |
| 04/17/2013 | CN202887006U Cutoff water supply control device for analysis meter |
| 04/17/2013 | CN202887005U Liquid level control device |
| 04/17/2013 | CN202887004U Automatic control system for water conservancy gates |
| 04/17/2013 | CN202887003U An intelligent water storage and drainage device |
| 04/17/2013 | CN202887002U Intelligent detecting controlling and warning device for liquid level of explosion-proof storage tank |
| 04/17/2013 | CN202874971U Buoy water level automatic control device for steam cabinet |
| 04/17/2013 | CN103049010A Control system and control method for automatic balancing of liquid levels |
| 04/17/2013 | CN103049009A Continuous water level control system based on singlechip |
| 04/17/2013 | CN102183970B Automatic water replenishing system of diffusion constant-temperature control tank |
| 04/17/2013 | CN101866187B Lithium bromide absorption type first-class heat pump unit device and control method thereof |
| 04/10/2013 | CN202870635U Water level monitoring device of mixer |
| 04/10/2013 | CN202870634U Automatic single pump water level controller |
| 04/10/2013 | CN103034252A Liquid level control device used in high temperature condition |
| 04/10/2013 | CN103034224A Multi-point remote monitoring system for settlement |
| 04/10/2013 | CN103030209A Effluent-adjustable weir device with nitrogen and phosphorus removal sewage treatment aeration tank and control method thereof |
| 04/10/2013 | CN102029649B Automatic control method of well-cementing cement mixing operation |
| 04/09/2013 | US8417483 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 |
| 04/09/2013 | US8417392 Qualification system and method for chilled water plant operations |
| 04/03/2013 | CN202854619U Laser level control instrument |
| 04/03/2013 | CN202854618U Simple wireless level controller |
| 04/03/2013 | CN202853689U Water tank liquid level measurement device |
| 04/03/2013 | CN202849152U Constant liquid level control device for aeration tank used in surface aeration oxidation ditch process |
| 04/03/2013 | CN103019266A Water level control system of water tank |
| 04/03/2013 | CN103019265A Liquid level monitoring system of water tank |
| 04/03/2013 | CN103019188A Internet-of-things-based remote intelligent control system and method for water level of water tower |
| 04/03/2013 | CN103016054A Water draining method of automatic water level controller |
| 04/03/2013 | CN103015373A Automatically-controlled water level weir gate |
| 04/03/2013 | CN103009481A Method and system for controlling concrete emptying and pumping |
| 04/02/2013 | US8412491 System and method for electric patterns discovery |
| 04/02/2013 | US8412411 Electronic control module heat limiting systems and methods |
| 04/02/2013 | US8412387 Apparatus for controlling a power using a smart device and method thereof |
| 03/27/2013 | CN202838048U Spiral-resisting type material level controller |
| 03/27/2013 | CN202838047U Automatic water level control device of boiler deoxidizing cylinder |
| 03/27/2013 | CN202838046U Side-spray float switch |
| 03/27/2013 | CN202838045U Country domestic water storage pond water level automatic controller |
| 03/27/2013 | CN202838044U Liquid level automatic control device of flotation machine |
| 03/27/2013 | CN202838043U Plant screen water storage tank water level automatic monitoring system |
| 03/27/2013 | CN202838042U Liquid level controlling device |
| 03/27/2013 | CN202838041U Liquid flowing-back prevention apparatus |
| 03/27/2013 | CN102999057A Paver, material level control method and system thereof |
| 03/27/2013 | CN102999056A Mining ultrasonic pulse material level monitoring device |
| 03/27/2013 | CN102419518B Developing machine, developing solution feeding system and method thereof |
| 03/27/2013 | CN102183969B Non-contact water kettle water level electronic detection and control method |
| 03/26/2013 | US8407015 Method and apparatus for monitoring and controlling an electrical boiler |
| 03/21/2013 | US20130073483 Systems, Methods, and Apparatus for Protecting Power Transformers |
| 03/21/2013 | US20130073101 Systems and Methods for Startup of a Power Plant |
| 03/20/2013 | CN202815611U Water level control structure of dehumidifier |
| 03/20/2013 | CN202815610U Heat transfer oil heater additional oil level control device |
| 03/20/2013 | CN202815609U Acidic chemical supply control system |
| 03/20/2013 | CN202815608U Water tank water-level control system |
| 03/20/2013 | CN202815607U Liquid level automatic controller |
| 03/20/2013 | CN202815606U Mixer water level monitoring device |
| 03/20/2013 | CN202815605U Liquid level controller suitable for various environments |
| 03/20/2013 | CN202815604U Liquid level automatic control device |
| 03/20/2013 | CN202815603U Generator water shortage linkage controlling device |
| 03/20/2013 | CN202815602U Gravitational automatic water-feeding device |
| 03/20/2013 | CN202815601U Water level controller |
| 03/20/2013 | CN102983342A Automatic water supplementing method of fuel cell humidifier and device thereof |
| 03/20/2013 | CN102981518A Automatic water level control device provided with time-base circuit |
| 03/20/2013 | CN102981517A Dry beach safety detecting system |
| 03/20/2013 | CN102981516A Novel water level controller |
| 03/20/2013 | CN102312040B Four-impulse control method for steam drum water level of converter |
| 03/20/2013 | CN101936593B 恒湿机 Humidity machine |
| 03/19/2013 | US8401711 System and method for managing distributed renewable energy systems |
| 03/14/2013 | US20130066475 Seawater desalination plant system |
| 03/14/2013 | DE102011053407A1 Füllstandsüberwachung Level monitoring |
| 03/13/2013 | CN202795073U Measuring control system of titanium dioxide preparation pot |
| 03/13/2013 | CN202795072U Water level controlling device |
| 03/13/2013 | CN202773533U Intelligent growth and cultivation device for soil cultivation plant |
| 03/13/2013 | CN102968136A Accumulated water monitoring and alarming system |
| 03/13/2013 | CN102968135A Microsample injection control system |
| 03/13/2013 | CN102968134A Fountain circulation water supply automatic control device |
| 03/13/2013 | CN102968133A Feed supplement control method, device and system |
| 03/12/2013 | US8396821 Utility monitoring systems and methods of use |