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Fax: 636.537.1405

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EchoTouch™ Ultrasonic Level Transmitter

-LU20 Data Sheet-
-LU20 Manual-
-LU30 Data Sheet-
-LU30 Manual-




The EchoTouch™ is an ultrasonic transmitter that provides non-contact level measurement. This transmitter is available in two models: two-wire (LU20) or three-wire (LU30). Both have an LED display (in inches or cm), easy calibration using simple push buttons, and are well-suited for challenging media, although the LU20 is instrinsically safe for especially difficult liquids.




(LU20) 6" to 18' (15 cm to 5.4m)
(LU30) 6" to 24.5' (15 cm to 7.4 m)

LED Indication: (LU30) Relay status
Accuracy: ±0.25% of span in air Process Temp: (LU20) F: -4° to 140°, C: -20° to 60°
(LU30) F: -20° to 140°, C: -4° to 60°
Resolution: 0.125" (3 mm) Temp Comp: Automatic
Beam Width: 8° conical Ambient Temp: F: -40° to 140°
C: -40° to 60°
Dead Band: 6" (15 cm) Pressure: 30 psi (2 bar) @ 25°C, derated @ 1.667 psi (.113 bar) per °C above 25°C
Display type: LCD, 4 digit Enclosure rating: NEMA 4X (IP65)
Disply units: Inch or cm

Enclosure material:

Memory: Non-volitile Trans material: PVDF
Supply Voltage: (LU20) 12-32 VDC
(LU30) 14-36 VDC
Cable jacket material: (LU30) Vinyl
Loop resistance: (LU20) 600 Ohms @ 24 VDC Cable type: (LU30) Pow./signal: 3-conductor, Relay: 3-conductor
Consumption: (LU30) 200 mA max Cable length: (LU30) 9" (22 cm)
Current Flow: (LU30) Source/sink Process mount: 2" NPT (2" G)
Signal Output: 4-20 mA, two-wire Mount gasket: Viton
Signal Invert: 4-20 or 20-4 mA Conduit entrance: Single, 1/2" NPT
Calibration: Push button Classification: (LU20)Instrinsically safe
(LU30) General purpose
Contact Type: (LU30) (1) SPDT relay, latching Approvals: (LU20) Class I, Groups A, B, C, D; Class II, Groups E, F, G; Class III; T3C
Contact Rating: (LU30) 250 VAC @ 10A Parameters: (LU20) CSA: Vmax<32.0 V; Imax<130 mA; Ca=0µF; La=0µH
Contact Logic: (LU30) Single point: alarm,
Two point: latching
Certificates: (LU20) CSA: LR 79326
Fail-safety: Reverts to safe state during echo loss CE Compliance: (LU20) EN 61326 EMC
(LU30) EN 61326 EMC, EN 61010-1 safety


Call toll-free: 888.206.4108--- Email: sales@levelandflowonlinesales.com --- Fax: 636.537.1405