FD 20 is a portable ultrasonic tester or ultrasonic thickness gauge with a large LCD screen that displays A-scan maps of ultrasonic signals as well as B-scan images of cross sections. Ideal for use in mechanical engineering, aerospace and metallurgical applications, this high-frequency ultrasound-based thickness meter uses a contact transducer (two different probes included; 45° and 90°) to measure material thickness and identify flaws and defects such as discontinuity in welds. 

Ultrasonic Tester FD 20

  • Operating frequency range

    1 ... 10 MHz

    Measure time interval range (scan duration)

    6 ... 1000 microseconds (µs)

    Sound velocity range

    1000 ... 9999 m/s 

    Deviation of measurement of time intervals

    Not exceed ± 0.025 µs

    Max. deviation of amplitude of signals at receiver input in 0 ... 110 dB range

    Not exceed ± 0.5 dB

    Testing gain region

    125 dB

    Averaging over the quantity of starts

    1 ... 16

    Range of time-variable gain (TVG) / Number of control points TVG

    40 dB / 15

    Duration of excitation pulse to load

    0 ... 0.5 µs

    Amplitude of excitation pulse to 50 Ohm load, not less

    100, 200, 300

    Operating frequency range of receiver at -3 dB

    1 ... 10 MHz

    Deviation of amplitudes of input signals in 10 ... 100% range of screen height

    Not more than 1 dB

    Scanning

    1 ... 1000 µs

    Scanning delay

    0 ... 2000 µs

    Measurement range of time intervals

    0 ... 1000 µs

    Prism of probe delay

    0 ... 15 µs

    Automatic signaling of defects (AFS)

    Dual-gate

    Setting range of AFS gates

    0 ... 2000 µs

    Adjusting thresholds of AFS gates

    0 ... 100%

    Detection of signals (receiver)

    Positive half-wave, radio mode

    Dimensions of device (approx.)

    80 x 162 x 35 mm / 3.14 x 6.37 x 1.37"

    Dimensions display (approx.)

    48 x 74 mm / 1.88 x 2.91"

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