Liquid level switches find themselves in hot water
A
PVL product story
Edited by the Engineeringtalk editorial team
Dec 17, 2004
PVL has added a high temperature version to its RFS range of versatile and highly cost-effective liquid level switches.
PVL has added a high temperature version to its RFS range of versatile and highly cost-effective liquid level switches.
Suitable for use in a wide range of liquids, the RFS-12H provides heat resistance up to 180C, with a rugged, simple design that brings maximum reliability to high, low or intermediate liquid level detection.
This miniature, side entry level switch provides user-selectable NO or NC contacts, and can be rotated by 180 degrees, allowing a single device to provide rising-on, rising-off, falling-on or falling-off functionality.
Simple in design, the principle of operation is a magnetic reed switch, where the magnet-equipped float moves up and down with the liquid to actuate the switch within the unit stem.
The RFS-12H is available in two mounting options for added convenience, allowing the device to be secured from either the inside or the outside of a tank.
The internal model has a 0.125in BSP parallel thread with a running back nut, while the external model has a 0.5in BSP taper thread.
Both have been designed to offer maximum resistance to shock and vibration.
Electrical connection is made via flying leads,.
maximum switching voltage is 300V AC/DC and maximum switching current is 0.5A AC/DC, with the contacts rated at 50W.
The high temperature resistance, combined with a variety of construction materials and a float specific gravity of just 0.7, make the RFS-12H suitable for use with a wide range of liquids in a variety of applications.
As well as standard tank level duties, the RFS-12H is suitable for use in chemical processing systems, in automatic safety interlocks, in pump motor control systems, and other challenging applications.
This simplicity of design is the key to both the high levels of reliability and the low price, with the high temperature RFS-12H available at just GBP 35.00.
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Contact PVL
Tel +44 1892 664499
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