SI - QB-2 Plus Mil Spec Quick Break & Shot Timer

SI - QB-2 Plus Mil Spec Quick Break & Shot Timer

Provides digital readout of quick break voltage and verifies quality of the quick break, warning you if components are wearing down


Scientific Instruments' QB-2 Plus measures the duration of the magnetizing shot and provides a quantitative verification of the Quick Break function. Both shot time and Quick Break voltage are shown on the LCD Display after each shot event.

The QB-2 Plus can accurately verify the correct shot duration of AC, HWDC and FWDC equipment, and verify the Quick Break function on single phase and 3-phase FWDC units. The QB-2 probe is placed inside the coil (on in line with the cable wrap) during a magnetizing shot. Quick Break voltage and shot time are captured and displayed on the LCD display. Using the QB-2 Plus will help ensure residual field is properly developed during processing and gives sharper resolution of transverse indications. 

QB-2 Plus In Use


  • Measurement of shot time and Quick Break
  • Most sophisticated and accurate shot timer in the industry (.20 to 9.9 sec)
  • Microprocessor control analyzes quick break pulse waveform
  • Provides actual digital readout of quick break voltage, which is much more accurate than traditional "go/no go" flashing LED or neon bulb detectors.
  • Allows you to verify actual quality of the quick break, to warn you when contactor springs or other components may be wearing out.
  • LCD Display with large easy to read digits
  • Powered by 9V battery
  • Low Battery Indicator
  • NIST traceable certification and 3 year warranty included
  • Meets or exceeds Mil Spec M-6867C

QB-2 Plus Mil Spec Quick Break & Shot Timer


Technical Specifications

Power Source  9 Volt Battery
Shot Timer Accuracy  1% of reading +/- 2 counts
Shot Time Resolution   .01 seconds
Shot Time Range   .20 to 2.80 seconds
Quick Break Accuracy   1% of reading +/- 2 counts
Quick Break Resolution   .01 Volts
Operating Temperature   32° - 104°F (0° - 40°C)
Cable Length   6 ft.
Dimensions   10" x 4" x 2" (254 x 101.6 x 50.8 mm)
Weight   2 lbs. (0.91 kg)
Compliance Meets ASTM E709, ASTM E1444, ASTM E3024

Product Literature

Description Part # Saved Price Select Option Add to
QB-2 Plus Mil Spec Quick Break Tester + Shot Timer with certification document and carrying case MT-SI-QB2-PLUS $1,450.00