To better handle difficult process conditions, the Liquiphant FTL31 and FTL33 liquid level switches are based on tuning fork technologies and are featured as replacements for float switches or conductive, capacitance, and optical sensors. The FTL31 is designed for chemical, oil, and gas applications while the FTL33 suits food, beverage, and pharmaceutical endeavors. In both sensors, a piezoelectric drive causes a tuning fork to vibrate at its resonance frequency. When the tuning fork is immersed in a liquid, its frequency changes due to a change in density of the surrounding medium. The electronics system in the switch monitors the resonance frequency and indicates whether the tuning fork is vibrating in air or is covered by liquid. The level switches can be installed in any vertical or horizontal position in a vessel, pipe or tank. Foam formation, changing conductivity or density does not affect their function. Both level switches have an external function test feature, an LED indicator for on-site testing, and either a three-wire DC-PNP output or two wire ac/dc output when the liquid level reaches the switching point. For a datasheets, go to:
• http://www.endressdirect.us/ftl31
• http://www.endressdirect.us/ftl33
Endress+Hauser Inc.
Greenwood, IN
888-363-7377
[email protected]
http://www.us.endress.com
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