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GemsSensors | Level Sensing

Gems offers the broadest selection of liquid level sensors anywhere. Single point and multi-point level switches, visual indicators and continuous liquid level sensing products. Each senor type is offered in multiple technologies from low cost proven reed switch based floats, compact solid-state electro-optics, no moving parts conductivity switches and controls, capacitive to ultrasonic and non-intrusive piezo-resonant.

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GemsSensors | Level Sensing

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  1. Gems™ Sensors & Controls Liquid Level Sensing Technologies Website: www.GemsSensors.com Call :1-800-378-1600

  2. Each of today’s liquid level sensing technologies excels in various roles and primarily includes the following types: • Float or Buoyancy • Pressure • Conductivity • Load Cells • Capacitance • Piezo Resonant • Ultrasonic • Optical Various Technologies….. Website: www.GemsSensors.com Call :1-800-378-1600

  3. Pros: Non-powered, proven, direct indication Cons: Invasive, contact fluids, moving parts Typical Applications: Water Tanks, saline, buffer, and reagent bottle content monitoring Conductivity Pros: No moving parts, low cost Cons: Invasive, probe erosion, liquid needs to be conductive Typical Applications: Boiler water, reagent monitoring Float/Buoyancy Website: www.GemsSensors.com Call :1-800-378-1600

  4. Pros: No moving parts, can be non-invasive, accurate Cons: Continuous calibration, needs resistive liquids Typical Applications: Reagent, waste, and wash container levels ULTRASONIC Pros: No moving parts, small, accurate Cons: Expensive, invasive Typical Applications: Large process tanks pharmaceutical Capacitance Website: www.GemsSensors.com Call :1-800-378-1600

  5. Pros: Non-invasive/non-contact, accurate, repeatable, and economical Cons: Powered, works only with plastic containers, wall thickness, temperature limitations Typical Applications: Reagents, waste, diluents, wash, saline, pure water Piezo-Resonant ExOsensePiezo-Resonant Sensor Website: www.GemsSensors.com Call :1-800-378-1600

  6. Pros: Compact, no moving parts, high temperature capability Cons: Invasive, powered, and can be affected by dry or coating media Typical Applications: Reagents, waste, dialysate, detergent/wash, and coolant Electro-Optical Website: www.GemsSensors.com Call :1-800-378-1600

  7. 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 to the 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 switching within the unit to operate an external alarm or control circuit Electro-optic Operating Principle Website: www.GemsSensors.com Call :1-800-378-1600

  8. Website: www.GemsSensors.com Phone: 1-860-747-3000  | Fax: 860-747-4244 Email: info@gemssensors.com Address: Gems Sensors & Control, One Cowles Road, Plainville, CT 06062-1198 For inquiries

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