NDT Products


The PXB7.5M portable X-Ray Betatron is designed to produce high energy ionising radiation for industrial radiographic non-destructive testing.

The PXB7.5M contains no moving parts (excluding cooling fan) and no circulating liquids, radiation outside the main beam are low, so safe working distances are moderate. After demarcation of dose rate boundaries, the betatron may be used at external sites or in fabrication workshops with little or no additional screening.

The PXB7.5M produces radiographs of very high contrast, sensitivity and resolution. HLV STEEL: 32mm

The PXB7.5M is recommended for radiographic testing of weld joints and castings with a steel thickness of 50 to 360mm, concrete and other materials from 200 to 1200mm.

The irradiation field equals 250mm x 250mm @ 1M focal distance. In operation the PXB7.5M has no need for compensating filters that improves the uniformity of the radiation field.

The PXB7.5M is far less costly than other NDT accelerators such as ‘Linacs’.

The PXB7.5M replaces cobalt isotope gamma sources which may not give acceptable quality and require costly periodic replenishment.


Large forgings, castings, valves, beams, ships hulls, pressure vessels, engine blocks, billets, thick welds, composites, military hardware, munitions, propellants, reinforced concrete buildings and bridges and much more.

PXB7.5M Betatron Technical Specification
X-Ray output energy selector 2 to 7.5 MeV
Dose rate @ 1m (air) > 3R per minute
Focal spot size (Max) 0.3 x 3.0 mm
Duty cycle at 20 deg C (per hour) 75%
Radiation beam spread angle 26°
AC power input 110/240V 50/60Hz
Dimensions and weight mm/kgs.
Accelerator (Radiator) 600x400x230 90kg
PSU 590x380x360 60kg
Control panel 130x200x30 0.5kg

Required doses & associated optical density for D7 Agfa Gevaert film type.

Exposure dose R Optical density of images rel. units Calibration conditions
1.4 1.5 Cassette loading order: 0.5Pb – film – 1.0mm Pb, inspected piece: Flat steel plate, 80mm thick developer: D19 Kodak. Fixer: Kodak unifix.
2.25 2.0
2.8 2.5
3.5 3.0

Required relative doses in comparison with D7 film under similar conditions:

Film type D4 MX5 AX CX PT-1 PT-4M
Dose coefficient relative to D7 2.65 2.8 1.25 0.57 0.53 1.6



Dose rate distribution in the horizontal plane.

Degrees 0 22.5 45 67.5 90 112.5 135 157.5
Dose rate % 100 23 6.7 6.3 2.9 2.5 3.5 4.5
Degrees 180 202.5 225 247.5 270 292.5 315 337.5
Dose rate % 4.3 3.3 3.5 5.5 4 5 10.5 17


Dose rate distribution in the vertical plane.

Degrees 0 22.5 45 67.5 90 112.5 135 157.5
Dose rate 100 15 5.6 2.4 2 1 1 1.8
Degrees 180 202.5 225 247.5 270 292.5 315 337.5
Dose rate 4.3 1.8 1 1 2 2.4 5.6 15
SKU: PXB7.5M Category:

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