Compact flow switch designed for low liquid flow
An
Automation Products Group product story
Edited by the Engineeringtalk editorial team
Feb 14, 2001
Scientific Technologies is introducing the low-cost FLS Series OEM Compact Flow Switch, with one-piece construction, a magnetic return mechanism, and Noryl or bronze housings
Scientific Technologies (STI), Automation Sensors Division, introduces the low-cost FLS Series OEM Compact Flow Switch.
Available in many configurations for OEM flexibility, the compact (0.75 in.
x 2.4 in., 21 mm x 66 mm) FLS Series is designed for low liquid flow.
They feature one-piece construction, a magnetic return mechanism, NPT or hose fittings, Noryl or bronze housing (other materials available upon request) and factory calibrated flow setpoints from 0.18 to 1.06 GPM (0.7 to 4.0 LPM).
The FLS Series operates on the principle of the magnetic reed switch.
A magnet is mounted to a flapper inside the housing.
Its normal resting position is with the flapper in a position subject to liquid flow.
As pressure increases with flow rate, the flapper is forced away from its magnetically maintained at-rest position.
Switches of a similar design typically apply a spring to maintain its resting position.
Springs are mechanical components that are prone to failure.
Material in the liquid can corrode or jam the spring, and particles from corrosion can break loose and contaminate the product.
The magnets utilized in the FLS Series are selected for a particular flow rate, and are very repeatable over time.
Springs, on the other hand, will lose resistance over time and the setpoint will drift.
STI has been selected twice by Forbes and three times by Business Week as one of the "world's best small companies." STI's Automation Products Group serves the factory automation, semiconductor, transportation, oil and gas, consumer and food processing industries with a diversified offering of sensing technologies.
Products include level, flow, pressure sensing, positioning transducers, vehicle separation, profiling and ultrasonic sensors and controls.
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