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"