EchoPod® UG01 & UG03 Reflective Ultrasonic Multi-Function Liquid Level Transmitter





The general purpose reflective ultrasonic multi-function level transmitter provides continuous level measurement up to 9.8’ (3m) with a 4-20 mA analog signal output and four relays, and is configured via our WebCal software. The non-contact liquid level sensor features our proprietary Reflective Technology™ that delivers reliable level measurement in condensing environments. Each relay can be configured for alarm, automatic fill or empty functions. Select this sensor for small tanks with non-foaming or highly vaporous media such as chemicals, water, wastewater and oil. Typical applications include day tank, IBC or drum, cooling tower, skid or machine, process tank and waste sumps.


Offered in 1.5m (4.9’) and 3m (9.8’) measurement ranges

Fail-safe diagnostics with selectable relay and signal outputs

Narrow 2” (5cm) beam width for applications with limited space

Corrosion resistant PVDF transducer and compact PP enclosure

Short 1.5” (3.8cm) dead band maximizes tank filling capacity

Automatic temperature compensation from -40º to 80ºC

Four programmable relays with embedded level control logic

   1 pump or valve with 3 alarms

   2 pumps lead-lag with 2 alarms

   2 pumps duplexing with 2 alarms

   4 independent switch point alarms


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: UG01: 1.5” to 4.9’ (3.8cm to 1.5m), UG03: 4” to 9.8’ (10.1cm to 3m)
Accuracy: UG01: 0.125” (3mm), UG03: ± 0.2% of range
Resolution: UG01: 0.019” (0.5mm), UG03: 0.039” (1mm)
Dead band: UG01: 1.5” (3.8cm), UG03: 4” (10.1cm)
Beam width: 2” (5cm)
Configuration: WebCal® PC Windows® USB® 2.0
Memory: Non-volatile
Supply voltage: 14-28 VDC
Max. consumption: 0.5W
Loop resistance: 500 ohms @ 24 VDC
Signal output:

4-20mA, two-wire

Signal invert: 4-20mA or 20-4mA
Signal fail-safe: 4mA, 20mA, 21mA, 22mA, hold last
Contact type: (4) SPST relays
Contact rating: 60 VA, 1A maximum
Contact fail-safe: Open, closed, hold last
Contact hysteresis:


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
Transducer type: Reflective
Transducer mat.: Polyvinylidene fluoride
Cable jacket mat.: Polyurethane
Cable type: 9-conductor, shielded
Cable length: 48” (1.2m)
Process mount: -0001: 2” NPT, -0011: 2” G
Mount gasket: -0001: N/a, -0011: Viton®
Classification: General purpose
Approval (pending): UL 61010-1
Compliance: CE, RoHS


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