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'Duramag' magnetic shot timer

Introduction to
Magnetic Particle

magnetic shot timer

disc testing

Automatic inspection
of steel billets

Automatic inspection
of engine crankshafts

Inspection of
railway wheelsets

bench unit

Bench unit for
large aerospace

Heavy duty mobile
power packs

Magnetic Particle
Inspection Menu

This instrument is designed to enable MPI equipment users to meet the requirements of auditors from organisations such as Boeing, who insist on accurate measurement of magnetising periods imposed on components by MPI equipment.

Rapid non-contact test to measure magnetising shot

Measuring range 0.01 to 19.99 seconds

Single POWER/RESET control

Simple displayed messages

rdy - ready for measurement
run - measurement in progress
Err - magnetising shot exceeds 20 seconds

Calibration traceable to international standards

The DURAMAG measures the magnetising shot time by monitoring the magnetic field produced by such equipment and displaying the time that this field is present. A Hall Effect sensor is used to detect the presence of magnetic fields with strengths from 20 mT (200 Gauss) upwards, and the resultant signal from this sensor is conditioned and processed to display, the time period during which the field was present. This obviously corresponds to the "Mag Duration" or "Timed Magnetising Shot".


The DURAMAG is switched on by pressing the push button on the front panel. After a short time the display will show rdy, indicating that the instrument is ready to measure. The rdy display will remain until the Hall Effect sensor detects the presence of a magnetic field. At this point the timer is triggered and the display now indicates run. When the field disappears the display will indicate and hold the measured duration of the magnetic field in seconds, which is displayed to 2 decimal places.

The instrument will hold the last reading until the button is depressed, to reset the instrument ready for a further measurement. If however, the instrument is left inactive for five minutes it will switch itself off to extend battery life. In the event that the measured duration of the magnetic field exceeds 20 seconds, the message Err will be displayed, indicating that there was an error with the last reading.

To switch off the instrument, depress the button and hold it depressed for approximately 2.5 seconds or leave the instrument to switch itself off.


The DURAMAG is powered from 2 x AA size batteries. A low battery level is indicated by the batt message on the display.


The DURAMAG is supplied with a calibration conformance certificate traceable to International Standards. This certifies the accuracy of the timing process. A re-calibration service is available upon request.


Dimensions case: Length = 152mm
Width = 83mm
Height = 34mm
Weight: 300g including batteries
Operating temperature: 0 to +55 oC
Storage temperature: -25 to +70 oC (21 days)
Display: LCD with 12mm high digits
Timing range: 0.1 - 19.99 seconds
Timing resolution: 0.001 seconds
Display resolution: 0.01 seconds
Supply current OFF: negligible
Supply current ON: up to 30mA
Instrument sealing: IP65
Sensor Sensitivity: 20mT (200 Gauss)
Sensor Type: Miniature Linear Hall effect sensor mounted
within the instrument case, just above the display

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