SpotChecker Ultrasonic Spot Weld Tester

SpotChecker is a hand-held flaw detector for testing spotwelds in situ on the production line. It weighs just 3.2 kg, is battery operated and is sealed to IP65. It features hot swap battery exchange to ensure continuous operation. SpotChecker does not require intensive training but offers the advantage of an “expert” system for people less qualified in weld inspection.


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  • “Completes” our existing USLT product line for spot weld testing
  • Offers true portability with a rugged, environmentally protective housing
  • The key difference between this product and existing spot weld testing solutions is its size/weight, environmental protection and user friendly operating
  • Unique user interface to operate a pointing device by two trackballs
  • Touchscreen operation for direct access of different functions and settings on a big 8.4 inch LCD
  • Modern PC interfaces, including USB and wireless connection (WLAN, BlueTooth Remote control like USLT 2000)
  • Ease of use for untrained inspectors (Application Specific Software UltraLOG)
  • Compatible with other USLT 2000 solutions
  • Hot swap battery exchange for continuous operation
  • Environmentally protected according IP65
  • Weight approx. 3.2 kg including batteries
Enclosure Storage Temperature


-20 to +60 °C (-4 to +140°F)
Operating Temperature 0 to +45 °C (32 to 113°F)


Dimensions W 225 × H 314 × D 94 mm (W 8.85 x H 12.36 x D 3.7”)
Weight Approx. 3.2 kg (7.05 lb) (Incl. Batteries)
Protection Rating IP 65
Shock Resistance According to EN 600 68-2-27
Vibration Resistance According to IEC 600 68-2-6 Fc
Display 8.4” TFT, SVGA, Touchscreen
Control Devices 2 × Trackball with 2 Buttons Each, 6 Function Keys, Touchscreen
Connections Probes 2 × LEMO 00 Triax
Power Supply Unit 1 × LEMO 0S, 4-pin Socket
Network 1 × RJ45
USB 4 × USB Type A Socket,
Optional WLAN, Bluetooth
Power Supply Operating Voltage 15 V DC
Power Consumption Approx. 22 W
Batteries 2 × Lithium-Ion 10.8 V, 4.8 Ah
Operating Time Approx. 4.0 h with 2 Batteries
Power Supply Unit External Power Supply Unit 100 … 230 V AC, Max. 70 W
Ultrasound Pulser Type Spike Pulse
Pulse Repetition

Frequency (PRF)

Max. 1,000 Hz, No Continuous Pulse Sequence
Voltage Max. 400 V
Initial Pulse Rise Time < 15 ns
Damping 50 Ohm
Settings and Evaluation Calibration Ranges


Min. 0 to 2.5 mm (0 to 0.1”) (steel); max. 0 to 9,700 mm (0 to 381”) (steel)
Sound Velocity Range 500 … 15,000 m/s (0.02 … 0.59 “/μs) Integrated, Editable Material Table
Pulse Shift -10 to 1,500 mm (-0.39 to 50”) (steel)
Probe Delay 0 to 100 μs
Frequency Range 2 to 20 MHz (–3 dB)
Gain 110 dB, Adjustable in Steps of 0.5/1/2/6 dB
Rectification Full-Wave
Monitor Gates 2 Independent Monitor Gates, Adjustable over the Entire Maximum Calibration Range;

Evaluation on the Basis of A-scan at Display Refresh Rate

Distance Measurement – Initial Pulse and Measurement Point in Gate A or B

– Measuring Points: Gate B – Gate A (Differential Measurement)

Measurement Resolution Sound Path/Time of Flight: up to 12.6 mm: 0.01 mm; Otherwise 0.2 % of Display Width
Amplitude 0.5 % Screen Height or 0.2 dB
A-scan Digitization 1,024 × 1,024 Pixels
Display Freeze Static A-scan Freeze, Dynamic A-scan Freeze (Freeze Box)
Echo Comparison Simultaneous Display of the Currently Active Signal and a Stored A-scan
Dialog Languages German, English, French, Spanish, Italian, Chinese, Japanese
Units mm
Descriptions Chinese English Français Deutsch Español
SpotChecker Brochure Download