EchoSwitch® II, Bulk Tank Ultrasonic Switch, Non-Contact Multi-Point Level Controller


The general purpose ultrasonic switch and controller provides non-contact level detection up to 24.6' (7.5 m) with 3 SPDT 60 VA 1A relays. EchoSwitch II features an LCD display with digital push button configuration. 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 control modes with integral timer delay. The switch is well suited for a broad range of corrosive, waste and slurry type media. EchoSwitch II is broadly selected for atmospheric day tank, pump lift station and sump applications.

The integral three channel controller has powerful automation features including advanced pump and alarm control logic designed for day tank, process vessel and waste sump applications. From alarms to automatic fill or empty, pump duplexing and run dry protection, EchoSwitch II does it all. It's level made simple.

Non-contact level detection with integral 3-channel relay control
Offered in four sensor ranges up to 8m with 1" and 2" transducers
EasyCal target push button calibration with non-volatile memory
5cm minimum beam width for applications with restricted space
Fail-safe intelligence with troubleshooting diagnostic feedback
EchoSwitch II can be configured before installation. The switch features a non-volatile memory preventing set points from being lost even when the switch is powered down. Configuration is simple using the three push buttons (Up, Down and Select) and built-in LCD display. All you need to configure the switch is tank height, maximum fill height and the measured distances from the bottom of the tank to each set point. The EchoSwitch II configuration accepts several units of measure including inches, centimeters, feet or meters.
EchoSwitch, Multi-Point, Ultrasonic Level Switch, Flowline
LU77: 4" to 8.2'
(10 cm to 2.5 m)
LU78: 8" to 24.6'
(20 cm to 7.5 m)
0.25" (6.35 mm)
Effective beam width:
3" (7.6 cm) dia.
Configuration: Push button
Dead band:
LU77: 4" (10 cm)
LU78: 8" (20 cm)
Supply voltage:
95-250 VAC
Contact type:
(3) SPDT relays
Contact rating:
60 VA
Contact fail-safety:
Temp. comp.:
Electronics temp:
F: -4° to 140°
C: -20° to 60°
MWP = 30 psi
Enclosure rating:
NEMA 4X (IP65)
Enclosure vent: Water tight membrane
Encl. material: Polycarbonate, UV
Process mount:
1" / 2" NPT (1" / 2" G)
Trans. material:
Mount gasket: Viton®
Approvals: CE (Pending)
General purpose
EchoSwitch, Multi-Point, Ultrasonic Level Switch, Flowline

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