Scientific Instruments QB-3 Mag Shot Timer

Scientific Instruments QB-3 Mag Shot Timer


Scientific Instruments’ QB-3 accurately verifies the duration of mag shots using a non contact method by measuring the duration of the magnetic field in the coil of the mag unit. The QB-3 shot timer can measure all AC, DC, Full Wave, Half Wave, single phase and three phase waveforms. During use, the QB-3 probe is placed inside the coil (or in line with a cable wrap) during a magnetizing shot and the shot time is captured and displayed on the LCD display. You can also use the QB-3 to measure shot time on a power pack by placing the probe across one of the output cables.

A special feature of the QB-3 is that it will trigger on current as low as 50 amps, which is useful when inspecting small parts such as bearings in compliance with ASTM 1444.



  • .01 second resolution shot time measurement
  • .20 to 2.80 seconds shot timer range
  • Most sophisticated and accurate shot timer in the industry
  • Can measure shot time in a cable for power pack
  • LCD display with large, easy to read digits
  • Lightweight at only 2 lbs.
  • NIST traceable certification and 3 Year warranty included
  • Meets or exceeds Meets mil spec M-6867C

Technical Specifications

QB-3 Specifications

Power Source 9 Volt Battery
Shot Timer Accuracy 1% of reading, +/- 2 counts
Shot Timer Resolution .01 seconds
Shot Timer Range .20 to 2.80 seconds
Operating Temperature 0 - 40 C
Cable Length 6 ft
Dimensions 10" x 4" x 2"
Weight 2 lbs
Compliance Meets ASTM E709, ASTM E1444, ASTM E3024

Kit Includes

  • QB-3 Unit
  • Probe
  • Hard Transportation Case
  • Instruction Booklet
  • NIST Traceable Certification
  • 3 Year Warranty

Product Literature

Description Part # Saved Price Select Option Add to
Scientific Instruments QB-3 Mag Shot Timer MT-SI-QB3 $850.00