EchoTouch® US06 & US12 Reflective Ultrasonic Liquid Level Transmitter





The intrinsically safe reflective ultrasonic level transmitter provides continuous level measurement up to 39.3’ (12m) with a 4-20 mA analog and HART digital signal output, and is configured via its integral push button display module or WebCal software. The non-contact liquid level sensor features our proprietary Reflective Technology™ that delivers reliable level measurement in condensing environments. Select this sensor for bulk tanks with non-foaming or highly vaporous media such as chemicals, water, wastewater and oil. Typical applications include bulk storage, neutralization tank, clarifier and waste sumps.


Offered in 6m (19.6’) and 12m (39.3’) measurement ranges

Reflective Technology™ measures reliably with condensation

Corrosion resistant PVDF transducer with aluminum enclosure

Narrow 3” (7.6cm) beam width for applications with limited space

LCD display indicates level in inches, meters or percent of span

HART communication in point to point and multi-drop modes

Fail-safe diagnostics with selectable fail-safe signal outputs

Configuration via push button display or WebCal software

Automatic temperature compensation from -40º to 80º C


Condensation is the most common variable in liquid level applications. Condensation attenuates the acoustic signal of ultrasonic sensors with horizontal transducers, weakening their signal strength and signal to noise ratio by up to 50%, and substantially reducing their measurement reliability. At the core of Reflective Technology™ is a simple fact. Unlike flat horizontal surfaces, significant water droplets cannot adhere to smooth vertical surfaces. By orienting the transducer vertically, condensation runs off the transducer and does not affect sensor performance. The unimpeded transmit and receive signals are redirected to and from the liquid off a 45º reflector, delivering reliable level measurement. Thanks gravity.

Reflective Transducer

Patent Pending

Reliable Measurement

Horizontal Transducer

Signal Attenuation





Range: US06: 8” to 19.6’ (20cm to 6m), US12: 18” to 39.3’ (45.7cm to 12m)
Accuracy: ± 0.2% of range
Resolution: US06: 0.079” (2mm), US12: 0.196” (5mm)
Dead band: US06: 8” (20.3cm), US12: 18” (45.7cm)
Beam width: US06: 3” (7.6cm), US12: 6” (15.2cm)
Configuration: Push button; WebCal® PC Windows® USB® 2.0; HART 7 (pending)
Memory: Non-volatile
Display type: LCD, 6-digit
Display units: Inch, cm or percent
Supply voltage: 14-28 VDC
Loop resistance: 500 ohms @ 24 VDC
Signal output:

4-20mA, two-wire, HART 7 (pending)

Signal invert: 4-20mA or 20-4mA
Signal fail-safe: 4mA, 20mA, 21mA, 22mA, hold last
Process temp.:

F: -40º to 176º

C: -40º to 80º

Temp. comp.:


Ambient temp.:

F: -31º to 140º

C: -35º to 60º

Pressure: 30 psi (2 bar)
Enclosure rating: Type 6P (IP68)
Encl. material: Polypropylene
Enclosure vent: Water tight membrane
Conduit entrance: 1/2” NPT
Transducer type: Reflective
Transducer mat.: Polyvinylidene fluoride
Process mount: -0003: 2” NPT, -0013: 2” G
Mount gasket: -0003: N/a, -0013: Viton®
Classification: Intrinsically safe
Approval (pending): Haz Loc: Class I, Div 1, Groups A, B, C & D; Class II, Groups E, F & G; Class III; Class I, Zone 0, Group IIC, Zone 20, Group IIC; IECEx: II 1G, EEx ia IIC Gc
Entity parameters: See control drawing #600820
Compliance: CE, RoHS


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