Примеры использования Float switches на Английском языке и их переводы на Русский язык
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Official
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Colloquial
Float Switches.
Mercury Float Switches.
Float Switches.
Alternative 3: Optical Float Switches.
Float switches are used for monitoring the level of various liquids.
Alternative 1: Mechanical Float Switches.
Optical float switches are unaffected by liquid color or density.
Alternative 2: Magnetic Dry Reed Float Switches.
Mercury float switches require a swing area to properly operate.
Alternative 5: Sonic/Ultrasonic Float Switches.
Mercury float switches can handle a high inductive load, and have quiet operation.
Key words: submerged pump, controller, temperature and moisture sensors,liquid level, float switches.
Sonic/ultrasonic float switches utilize a sensor that contains a piezoelectrical crystal.
The table below lists some examples of products andapplications that use float switches.
Mercury float switches typically contain a small tube with electrical contacts at one end of the tube.
Thus, level control andlevel determination can be carried out without problems via such float switches.
Float switches can be used for monitoring liquid levels in tanks, wells, chambers, drillings, and other containers.
However, this is not required for mechanical float switches that use magnets in a vertical stem to activate the micro-switch.
Float switches and level indicators from Kobold Messring GmbH work extremely reliably within a defined tolerance range.
The UNEP Toolkit provides an example from Denmark where mercury float switches can contain between 6.8- 13.6 grams of mercury. UNEP, 2005.
Further, optical float switches provide very slight hysteresis, high repeatability, and are highly chemical resistant.
The Nordic Council of Ministers report states that the price of non-mercury alternatives are approximately the same price as mercury containing float switches. Maag, 2007.
Sonic/ultrasonic float switches are highly accurate and can be used for non-conductive and highly viscous liquids.
However, if this is not possible because of the nature of medium, for example,if the medium is so contaminated that it could hinder the magnetic level switch, float switches are often used.
Mercury float switches are usually located inside a buoyant float housing and are actuated based upon the rising and falling liquid levels.
The following are some of the more critical design parameters: number of switch points, type of level detection, switch/relay accuracy, reliability,type of liquid environment(for float switches), mounting style, type of enclosure, output contact rating, switch/relay life expectancy, regulatory approval required, electrical load type, operating parameters, environmental conditions, input power requirements, and type of switch/relay.
Mechanical float switches are usually located in a buoyant float housing and are actuated based upon the rising and falling liquid levels.
Float switches are used to actuate alarm and control circuits to provide controlled responses to varying liquid levels.
Optical float switches utilize optical principles to detect the presence or absence of a liquid as compared with a gas such as air.
In general, two float switches are used, one operate as a minimum level switch and other as a maximum level switch. .