gems sensors level sensing

7/31/2019 Gems Sensors Level Sensing

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GEMS SENSORS &

CONTROLS

Website:www.GemsSensors.com Call :1-800-378-1600

LIQUID LEVEL SENSING

TECHNOLOGIES
http://www.gemssensors.com/http://www.gemssensors.com/


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VARIOUS TECHNOLOGIES..


Each of todays liquid level sensing technologiesexcels in various roles and primarily includes thefollowing types:

Float or Buoyancy Pressure Conductivity Load Cells Capacitance Piezo Resonant

Ultrasonic Optical


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FLOAT/BUOYANCY


Pros: Non-powered, proven, direct indication

Cons: Invasive, contact fluids, moving partsTypical Applications: Water Tanks, saline, buffer,and reagent bottle content monitoring

CONDUCTIVITYPros: No moving parts, low costCons: Invasive, probe erosion, liquid needs to be

conductiveTypical Applications: Boiler water, reagentmonitoring


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CAPACITANCE


Pros: No moving parts, can be non-invasive,accurate

Cons: Continuous calibration, needs resistive liquidsTypical Applications: Reagent, waste, and washcontainer levels

ULTRASONIC

Pros: No moving parts, small, accurateCons: Expensive, invasiveTypical Applications: Large process tankspharmaceutical


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PIEZO-RESONANT


Pros: Non-invasive/non-contact, accurate, repeatable,

and economicalCons: Powered, works only with plastic containers,wall thickness, temperature limitationsTypical Applications: Reagents, waste, diluents, wash,

saline, pure water

ExOsense Piezo-Resonant

Sensor
http://www.gemssensors.com/http://www.gemssensors.com/Products/Level/Single-Point-Level-Switches/Piezo-Resonant-ExOsensehttp://www.gemssensors.com/Products/Level/Single-Point-Level-Switches/Piezo-Resonant-ExOsensehttp://www.gemssensors.com/Products/Level/Single-Point-Level-Switches/Piezo-Resonant-ExOsensehttp://www.gemssensors.com/Products/Level/Single-Point-Level-Switches/Piezo-Resonant-ExOsensehttp://www.gemssensors.com/Products/Level/Single-Point-Level-Switches/Piezo-Resonant-ExOsensehttp://www.gemssensors.com/Products/Level/Single-Point-Level-Switches/Piezo-Resonant-ExOsensehttp://www.gemssensors.com/Products/Level/Single-Point-Level-Switches/Piezo-Resonant-ExOsensehttp://www.gemssensors.com/Products/Level/Single-Point-Level-Switches/Piezo-Resonant-ExOsensehttp://www.gemssensors.com/


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ELECTRO-OPTICAL


Pros: Compact, no moving parts, high temperature

capabilityCons: Invasive, powered, and can be affected by dryor coating mediaTypical Applications: Reagents, waste, dialysate,

detergent/wash, and coolant


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PRINCIPLE


Contains an infrared LED and a light receiver

Light from the LED is directed into a prism which forms the tip of

the sensor

With no liquid, light from the LED is reflected within the prism tothe receiver

When liquid immerses the prism, the light is refracted out into the

liquid, leaving little or no light to reach the receiver

Sensing this change, the receiver actuates electronic switchingwithin the unit to operate an external alarm or control circuit


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FOR INQUIRIES

Website:

www.GemsSensors.comPhone: 1-860-747-3000 | Fax: 860-747-

4244Email: [email protected]

Address: Gems Sensors & Control, OneCowles Road, Plainville, CT 06062-1198
http://www.marcopromotionalproducts.com/mailto:[email protected]:[email protected]://www.marcopromotionalproducts.com/

gems sensors level sensing

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