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