bPAD is a compact microcontroller-based Single Channel Analyzer. The device contains a Preamplifier-Amplifier-Discriminator with TTL digital output. The bPAD also includes its own high voltage power supply for operating standard 14-pin photomultiplier tubes, which are commonly used with scintillator-type radiation detectors.

The device is therefore useful as a compact system to monitor the count rate in an energy region of interest. The detected signal is output as a TTL pulse, making it compatible with most industrial, environmental and laboratory counting systems.  In contrast with traditional SCAs the bPAD is fully controlled by a microprocessor, providing easy setup and “smart” modes of operations. bPAD parameters can be conveniently set via USB with a PC and the provided configuration software.

bPAD can be provided with several scintillation detector assemblies. Our catalogue includes NaI(Tl), CsI(Tl), BGO, LaBr3 and CeBr3 detectors.
Standard configurations with:

  • NaI(Tl), CsI(Tl) and BGO, with cylindrical volume 2”x2” or 3”x3”
  • CeBr3 and LaBr3 with cylindrical volume 1.5”x1.5”
  • LaBr3 with cylindrical volume 1”x1”

Other scintillators types and volumes can be provided on request.

In addition to standard supply, the following options are available upon request:

  • bPAD
  • bPAD+ : adds an extra analog pulse output, which can be connected to an external MCA for monitoring purposes,
  • bPAD+VR: the extra analog output can be configured to deliver the pulse signal, as in the bPAD+, or a variable voltage level which is proportional to the discriminated count rate.


Code Material Dimension Energy Resolution FWHM at 662 keV
BPAD-5151NAI NaI(Tl) 2″ø x 2″h <7.5%
BPAD-7676NAI NaI(Tl) 3″ø x 3″h <7.5%
BPAD-5151CS CsI(Tl) 2″ø x 2″h <8%
BPAD-7676CS CsI(Tl) 3″ø x 3″h <8%
BPAD-5151BGO Bi4Ge3O12 2″ø x 2″h <13%
BPAD-7676BGO Bi4Ge3O12 3″ø x 3″h <13%
BPAD-3838CEBR CeBr3 1.5″ø x 1.5″h <4.2%
BPAD-2525LABR LaBr3 1″ø x 1″h <3.5%
BPAD-3838LABR LaBr3 1.5″ø x 1.5″h <3%


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