Portable Ultrasonic Flaw Detector

The latest version of the USM 35 portable ultrasonic flaw detector from GE's Inspection Technologies business, is now totally protected against the ingress of dust and high pressure jets of water to IP 66 and contains new software which allows its operation to Japanese weld inspection standards.










  • Protection accorind to IP66
  • Can be operated in harsh or industrial environments
  • Fast and bright color LCD
  • Rechargeable battery with ability to operate for 14 hours
  • Max allowable operating temperature range from 0°C to 50°C
  • Optional DGS module for single element or dual element (T/R) probes. The module includes some preset GE's single or dual probes. Other probes can be configured by the user.
  • trueDGS® angle beam transducers and software for significantly improved sizing capabilities to EN 583-2

Calibration ranges

Min 0 to 0.5 mm +10 % (steel), 0 to 0.02” +10 % (steel)
Max 0 to 9,999 mm +10 % (steel), 0 to 390” +10 % (steel) within the frequency range from 0.2 to 1 MHz / 0.5 to 4 MHz 0 to 1,420 mm +10% (steel),0 to 56” +10 % (steel) within the frequency range from 0.8 to 8 MHz / 2 to 20 MHz
Sound velocity 1,000 to 15,000 m/s, 40 to 600 inch/ms variable in steps of 1 m/s, 0.1 inch/ms and fixed programmed values
Display delay From -10 to 1,000 mm, -0.3 to 40” (340 μs)
Probe delay 0 to 200 μs
Auto calibration Measurement and setting of sound velocity and probe delay using two known calibration echoes (2-point calibration)
Pulse intensity 220 pF, 1 nF
Damping 50 ohms, 500 ohms (1,000 ohms in TR mode)
Pulse repetition frequency 4 to 1,000 Hz, variable in 10 steps
Frequency ranges (-3 dB) 0.2 to 1 MHz / 0.5 to 4 MHz / 0.8 to 8 MHz / 2 to 20 MHz
Gain 0 to 110 dB, variable in steps
Gain steps 0.5 / 1 / 2 / 6 / 12 dB (or user-adjustable), step 0 is locked
Fine gain 4 dB, continuously variable in 40 steps
Rectification Full-wave, negative and positive half-wave, RF mode
Reject Linear, 0 to 80 % screen height Variable in steps of 1 %
Monitor gates 2 independent gates in color bar mode, start and width variable over the entire calibration range, response threshold of 10 to 90 % screen height variable in steps of 1 % (coincidence and anti-coincidence), alarm signal via LED and connectable internal horn, Gate A switchable as interface gate for Gate B, gate magnifier (zooming of gate range over the entire display range)
Sound path measurement Digital display of sound path (projection distance, depth) between initial pulse and the first echo in the gate, or between the echoes in the two gates, measurement always at the intersection point with the echo flank or echo peak
Measurement resolution 0.01 mm within a range up to 99.99 mm/ 0.1 mm within a range from 100 to 999.9 mm/ 1 mm above 1,000 mm, 0.001” within a range up to 9.999”/ 0.01” above 10” With evaluation in the frozen A-scan: 0.5 % of the calibration range setting
Amplitude display In % screen height
USM 35X DAC: additionally in dB above DAC or TCG
USM 35X S: additionally in dB above DGS curve or ERS
Displayed reading Sound path, (reduced) projection distance, depth, amplitude for every gate, userconfigurable at four positions of measurement line and of the zoomed display in the A-scan
A-scan functions Manual or automatic A-scan freeze, A-scan comparison, echo dynamics (envelope), peak echo storage
Color functions Patented color-coded display of legs in angle testing, adaptation of background color to the light conditions of test environment, color display of monitor gates and of registration curves (DAC, TCG, DGS) for direct recognition, messages and alarms in red characters
DAC / TCG (Option) Only USM 35X DAC and USM 35X S: Distance- Amplitude Curves (DAC) or TCG line (TCG) with a maximum of 10 reference echoes, 4 other curves or lines can be displayed with variable dB intervals. JIS DAC can be selected in order to allow inspection acording to JIS Z3060-2002 (Japanese Inspection Standard). Automatic gain control during DAC recording.
DGS (Option) Only USM 35X S: DGS curves for single-element and dual-element probes (B1S, B2S, B4S, MB2S, MB4S, MB5S, WB…-1, WB…-2, SWB…-2, SWB…-5, MWB…-2, MWB…-4, SEB and MSEB) and for all materials, sound attenuation and transfer loss correction, 4 other curves can be displayed with variable dB intervals
Display size / resolution 116 mm x 87 mm, 4.6" x 3.4" (W x H)
320 x 240 pixels
A-scan size / resolution 116 mm x 80 mm, 4.6” x 3.2”
320 x 220 pixels (zoom)
Units of measurement mm, inch
Data memory 800 instrument setups or reports, including AScans can be stored, recalled, printed or exported to a computer.
Direct documentation Display screen contents, report including A-scan, reading, function list (parameter dump)
Printer driver HP DeskJet, HP LaserJet, HP DJ 1200 (DeskJet),HP LJ 1012 (LaserJet), EPSON FX/LX, SEIKO DPU
RS 232 interface 9-pin DSUB, bi-directional, 300 - 57,600 baud An USB adapator cable can be provided to connect the USM 35X to a computer that does not have RS 232 port
Input/Output 8-way Lemo-1 socket (trigger output, gate alarm, test data release)
Additional analog output for amplitude or sound path in selected gate
VGA output 10-way Lemo-1 socket for the connection of an external display screen or beamer
Probe connections 2 x Lemo 1 or BNC
Dialog languages German, English, French, Italian, Portuguese, Spanish, Danish, Swedish, Norwegian, Finnish, Czech, Slovenian, Romanian, Dutch, Croatian, Hungarian, Russian, Polish, Slovakian, Japanese
Battery operation Li-ion battery or 6 C-cells (NiCad, NiMH or AlMn), operating time: 14 hours with Li-ion battery (6.6 Ah), approx. 3 hours with NiMH cells (3 Ah), battery charge check by an icon in the measurement line
Power pack/ battery charger operation Via an external power supply (85 to 265 VAC);
Operating voltage: 6 to 12 VDC
Current consumption: max. 9 W, depending on the setting
Weight 2.2 kg, 4.9 lbs., including batteries
Size 177 mm x 255 mm x 100 mm, 7.0" x 10" x 3.9" (H x W x D)
Environmental Protection class: IP 66 Shock proof acc. to DIN IEC 68: 6 ms, 60 g, 3 shocks per orientation Vibration proof acc.
to DIN IEC 68: 0 - 150 Hz, 2 g, 20 cycles per orientation
Operating temperature: 0° to 60°C; 32° to 140°F (-10°C; 14°F on special request)
Storage temperature: -20° to 60°C; 4° to 140°F

Data Logger Option

Memory capacity 5,000 readings, 500 A-scans for the readings, 100 jobs, 10 comment texts per job
Storable readings Sound paths and sound path differences of all gates, amplitudes (% SH, dB-to-threshold, dBto-curve, %-to-curve, ERS), alarms of all gates or tolerance monitor
Lines / columns Number of lines: maximum 5,000 (Linear file with one column), numerical indexing Number of columns: maximum 26, indexing: A, …, Z
Tolerance monitor Lower and upper acceptance level with monitor function
Minimum reading capture Storage of the minimum value measured in continuous scanning, display of the value 3 seconds after uncoupling the probe
Monitor gate 1 additional independent gate in color bar mode
Descriptions Chinese English Français Deutsch Japanese Português RU Russian Español
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USM 35X Specification Sheet USM 35X Specification Sheet USM 35X Specification Sheet USM 35X Specification Sheet USM 35X Specification Sheet