High Speed spectrometer - Up to 100,000 cps. 

The GS-2020-NAI-MAX is a 2x2" NaI(Tl) detector with integral high speed spectrometer, this detector can count up to 100,000 cps with excellent resolution.

It connects directly to a PC and works with free open source software called Becqmoni.

Temperature Stabilised

The GS-2020-NaI-MAX  detector has integral temperature sensor to compensate for temperature drift over a wide range from -40C˚  to +80C˚

PC Software

Becqmoni software comes with all the features you expect of a professional gamma spectroscopy system, background subtraction, isotope identification and more.

Download Becqmoni

Android Software

This product will also work with Atom-Spectra on Android, but you will most likeley need a Type-B to Type-C USB cable (not supplied)

Download Atom-Spectra


Scintillation Crystal

52 x 52 mm Encapsulated NaI(Tl)


Hamamatsu R6231


Aluminium 1.0 mm (+-0.2)


White powder coat


250 x 63 mm

Connector (on detector)

USB Type-B

USB Cable length

2 meter

Power consumption

170 mA (USB 5V)

Max number of channels


Temperature stability

-40 C˚ to +80 C˚

Communication protocol


Communication speed (rec) 

600,000 Baud

Bias voltage 

Factory preset ~650V


1 x Gamma Detector with 2x2" NaI(Tl) 

1 x Water resistant USB cable 2.0 meter 

1 x Poly Propylene Instrument case

1 x Manual

Download Brochure

Made in Australia

This spectrometer is made in Australia by Bee Research Pty Ltd in collaboration with Max Koshelev

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GS-2020-NAI-MAX Gamma Spectrometer

  • USD $2,800.00

Tags: Gamma spectrometer, nai detector, scintillation detector, usb spectrometer

Refund & Return Policy

We want you to be 100% happy with your Gammaspectacular product, and offer free after sales support to get you up and running.

If you for any reason you require a refund or replacement, please contact us within 30 days of purchase to arrange the return.
Return shipping cost and risk is the sole responsibility of the buyer.

Return shipping address: Bee Research, Po Box 6259, Alexandria, NSW 2020, Australia