• EchoTouch® LU20 Ultrasonic Level Transmitter





    CSA approved intrinsically safe for use in hazardous locations, the two-wire ultrasonic transmitter provides non-contact level measurement up to 18' or 5.4m, and is ideally suited for challenging corrosive, slurry or waste liquids. Push button calibrated, the transmitter is typically selected for atmospheric bulk storage, day tank and waste sump applications located within a classified area. Media examples include diesel fuel and sulfuric acid.



    Intrinsically safe transmitter for use in hazardous environments

    LCD digital display indicates level in inches or centimeters

    EasyCal simple push button calibration for all user set points

    Polypropylene enclosure rated NEMA 4X with rugged PVDF transducer

    Adjustable dead band and range filters eliminate false echo returns


    Range: 6" to 18' (15cm to 5.4m)
    Accuracy: ± 0.25% of range
    Resolution: 0.125" (3mm)
    Dead band: 6" (15cm)
    Beam width: 8° conical
    Configuration: Push button
    Memory: Non-volatile
    Display type: LCD, 4-digit
    Display units: Inch or cm
    Supply voltage: 12-32 VDC
    Loop resist.: 600 Ohms @ 24 VDC
    Signal output: 4-20 mA, two-wire
    Signal invert: 4-20 mA, 20-4 mA
    Signal fail-safe: Reverts to safe state during echo loss
    Process temp.: F: -4° to 140°
    C: -20° to 60°
    Temp. comp.: Automatic
    Ambient temp.: F: -40° to 140°
    C: -40° to 60°
    Pressure: 30 psi (2 bar) @ 25° C, derated @ 1.667 psi (.113 bar) per °C above 25° C
    Enclosure rating: NEMA 4X (IP65)
    Encl. material: PP, UL94VO
    Conduit entrance: Single, 1/2" NPT
    Trans. material: PVDF
    Process mount: 2" NPT (2" G)
    Mount gasket: Viton®
    Classification: Intrinsically safe
    Compliance: CE
    Approvals: CSA: Class I, Groups A,
    B, C, D; Class II, Groups
    E, F, G; Class III; T3C
    Parameters: CSA: Vmax < 32.0 V;
    Imax < 130 mA; 
    Ca = 0 uF; La = 0 uH
    Certificates: CSA: LR 79326