• Non-contact level detection with integrated 3-channel relay control.
• Simple digital push button configuration, eliminating the need for target calibration.
• Options for pump simplex, duplex, and triplex configurations.
• Integrated timer for pump/valve delay and pump alternation.
• Available in two range options: 2.5m (8.2’) and 7.5m (24.6’).
• 10cm miniature dead band to optimize filling capacity.
• Polycarbonate enclosure rated NEMA 4X with a rugged PVDF transducer.

The EchoSwitch II is a general-purpose ultrasonic switch and controller designed for non-contact level detection up to 24.6’ (7.5 m). It features three SPDT 60 VA 1A relays, digital push button configuration, and eliminates the need for target calibration. Each relay can be configured to control pumps, valves, or alarms, and can be set up in simplex, duplex, or triplex modes. The integrated timer allows for pump/valve delay and timed pump alternation. It is suitable for corrosive, waste, and slurry media, and is commonly used in atmospheric day tanks, pump lift stations, and waste sump applications.

• Range: LU77: 4" to 8.2' (10 cm to 2.5m), LU78: 8" to 24.6' (20 cm to 7.5m).
• Repeatability: 0.25" (6.35 mm).
• Beam width: LU77: 2” (5 cm) dia., LU78: 3" (7.6 cm) dia.
• Dead band: LU77: 4” (10 cm), LU78: 8” (20 cm).
• LCD indication for level and relay status.
• Configuration via push button.
• Supply voltage: 95-250 VAC.
• Contact type: (3) SPDT relays, 60 VA, 1A max.
• Contact fail-safety: Programmable/selectable.
• Temperature compensation: Automatic.
• Electronics temperature: F: -7˚ to 140˚, C: -20˚ to 60˚.
• Pressure: MWP = 30 PSI.
• Enclosure rating: NEMA 4X (IP65).
• Enclosure material: Polycarbonate, UV resistant.
• Transducer material: PVDF.
• Process mount: LU77: 1“ NPT (1” G), LU78: 2” NPT (2” G).
• Compliance: RoHS, CE (Pending).

For installation on open tanks, order the appropriate side mount bracket: LM50-1001-1 (1" NPT), LM50-1061-1 (1" G), LM50-1001 (2" NPT), or LM50-1061 (2" G).

The EchoSwitch II features a new user interface with an integrated LCD screen and digital push button configuration, simplifying setup for complex lift stations or waste sumps. It utilizes DSP technology for reliable performance in corrosive or challenging liquids.