Two-Wire, Loop-Power Level Switch Offers Tank Monitoring and Interface Control

May 29, 2008

Fluid Components International introduces the NuTec LS2000 level switch for level monitoring and interface control in process industries that require precise measurements, low maintenance, long life and low cost-of-ownership. The LS2000 level switch is designed for two-wire, 4-20 mA loop power, allowing the LS2000 to serve as a drop-in replacement for other two-wire mechanical float and paddle switches without any wiring modifications. The LS2000 is also available for 115/230 VAC or 24 Vdc input power and a 6A relay output. The level switch features a thermal mass flow sensor, constructed with 304/305 stainless steel or with 316L all-welded stainless steel with wetted surfaces for rugged environments. With no moving parts to break, maintenance is virtually unnecessary after installation. In its top-mount configuration, the LS2000 level switch measures level within 0.25 inches (six millimeters) from its element tip. The side mount configuration is accurate within 0.125 inches (three millimeters). It is fully temperature compensated for process and plant environment swings of up to 100 degrees Fahrenheit (38 degrees Celsius) to provide measurement accuracy and stability under harsh conditions. Designed for service in tank and sump-level applications, the LS2000 level switch is useful in fill/drain control and overflow detection. The LS2000 is highly responsive, sensing dry-to-wet conditions in less than two seconds, wet-to-dry conditions in less than five seconds and a wet-to-wet interface in less than 10 seconds.

The LS2000's thermal mass flow sensing technology makes it suitable for detecting and controlling interface in tanks and separation vessels. It is useful in identifying the interface of multiple media, such as liquids and foams or liquids and sediments — even liquids and resins. The LS2000's level sensor operates at temperatures from -40 to 250 degrees Fahrenheit (-40 to 121 degrees Clesius) and at pressures to 500 psig for use in demanding processes. Its aluminum enclosure is rated NEMA 4X (IP66) for harsh environments. Approvals and ratings include: Class I and II, Div 1 and 2, Groups C and D, as well as FM, CSA, CE marking and ATEX. Compatible with clean media or dirty, slurry or foaming media, the LS2000 operates with a precision thermal mass flow sensor. Its two platinum RTD sensors are mounted in fully sealed, miniature thermowells that ensure long and dependable operation in the dirtiest of media and plant conditions. Its miniature sensor design ensures both fast-response and repeatability under all process conditions.