The general purpose ultrasonic level sensor provides continuous level detection up to 26.2’ (8m) with 3 programmable relays for level switch or level control functions, and a 4-20mA signal output. The sensor is programmed via the integral push button display module. Each relay can be configured on a single set point alarm or latched on two set points for automatic fill or empty in simplex, duplex or triplex level control modes with selectable time delay and fail-safe logic. The embedded level controller can lower cost by replacing external control hardware. This non-contact liquid level sensor is ideally suited for corrosive, sticky or dirty liquids, and is broadly selected for pump lift station, sump and day tank level applications.

FEATURES

Configuration is simple via integral push button display module
Three programmable relays for switch, pump control and fail-safety
1 pump or valve with 2 alarms
2 pumps lead-lag with 1 alarm
2 pumps duplexing with 1 alarm
3 independent switch point alarms
4-20 mA output provides local or remote process level monitoring
LCD display indicates level height in engineering units and relay status
Narrow 2” or 3” beam width for applications with limited space
Short 4” or 8” dead band maximizes the filling capacity of the tank
PVDF transducer and NEMA 4X PC enclosure for corrosive liquids
Automatic temperature compensation for accurate measurement

Repeatability: 0.25” (6.35mm)
Signal excitation: 12 to 28 VDC
Loop resist: 500 Ohms @ 24 VDC
Dead band: LU77: 4” (10cm), LU74/78: 8” (20cm)
Beam width: LU77: 2” (5cm), LU74/78: 3” (7.6 cm)
Configuration: Push button
Memory: Non-volatile
Display type: LCD, 6 characters

Technology : ultrasonic
Medium : for liquids
Applications : for tanks
Material : plastic
Other characteristics : 4-20 mA, digital, non-contact, programmable, NEMA 4X
Process pressure : 2 bar (29.01 psi)
Process temperature : Max.: