Gamma-Scout® Online Portable Radiation Detector

Product Name:Gamma-Scout Online Version Geiger Counter
Gamma-Scout® Online Portable Radiation Detector
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Gamma-Scout Online Geiger Counter



As you would expect with a German made Geiger counter, or “Geigerzähler” as they call it in Frankfurt, the Gamma-Scout Online version is a feature rich, well designed radiation detector that’s compact, ergonomic, and light, weighing in at just 6 ounces. It is a bit more complex than the competition so be prepared to spend some time with the user manual to fully understand the intricacies of this device.


It offers a 10-button control panel and large LCD display that can display measured radiation as counts per second, dosage rate and cumulative counts. In addition, the Gamma-Scout can be toggled between either digital or analog readouts, with these set to either µSv or mRems.


It is also equipped with a consumer friendly and highly useful analog scale that indicates maximum permitted human exposure per dosage level. The Gamma-Scout can measure gamma, x-rays, alpha and beta levels of radiation, and with a low range atmospheric sensitivity to high (0.01 up to 5,000.00 µSv/h), this Geiger device works well in a wide range of possible exposure scenarios.


Like most modern counters, it has a ticker feature which sets off an audible click whenever a particle or ray of radiation is detected. The ticker can be muted in silent mode with the LED readout your only radiation level indicator.


The Gamma-Scout arrives on without a power switch and stays on until the battery dies. But don’t worry.
The unit is factory installed with its Lithium Ion battery. Battery life is approximately 10 years under normal use, and for a small nominal charge, is factory replaced when it runs down.


The Gamma-Scout Online counter is outfitted with all the features of the Alert version model, but can also send real time detected pulses at specific time intervals via USB to a connected Windows PC.
For passive data logging, the device can store an impressive 32,000 data points, which at one per week, works out to over 600 years of memory capacity.

Gamma-Scout vs Radex Comparison

Current Specification Summary

Detection Profile —

Radiation Types
Alpha from 4 MeV
ß from 0.2 MeV
y from 30 keV
Calibrated scale 0.01 μSv/h to 5,000.00 μSv/h
Measurement Ranges:-
Measuring length 38.1 mm,
Measuring diameter 9.1 mm
Mica window 1.5 to 2 mg/cm2
Zero rate <10 pulses per minute with screening by 3mm AI and 50 mm Pb, operating voltage approx. 450 V

Internal Data Logging —

Memory 256,000 byte (100,000 data sets)
Software enable to read out the data gathered. The data is provided in list format.

User Interface —

Languages: German and English version
Display Liquid-crystal display (LCD), 4-digit, numeric with description,
Quasi-analogue logarithmic bar chart
Power Consumption
Less than 10 microamperes under environmental radiation
Temperature range -20 to +60°C
Dimensions and Weight: 6.5″ (165mm), W 2.8″ (72mm), H 1.2″ (30mm). 6 ounces (130 grms)
Warranty: 2 years
Housing Impact-resistant plastic
Battery: powered by a 2.7 – 3.7 V lithium thionyl chloride cell
Certifications:-Meets all European CE standards as well as US FCC 15 standard
Casing: Impact-resistant Novadur

Suggestions for Improvement


One of the criticisms of the device is that it is fitted with a small LND tube, which may compromise its sensitivity. There is an additional problem with the tube – it is board soldered and is prone to detach if the unit is dropped. That’s why it should always be used with a case. The plastic case isn’t fragile. The problem is that the device isn’t shock resistant. Any small drop onto a hard surface can dislodge the components and render the Gamma-Scout useless. The recessed display is large, but not so easy to read with important text and icons located on the the top part of the display. This creates a shadow that makes it hard without any backlight. And finally, the plastic case, while difficult to break, does seem a bit flimsy.


Displays both analog and digital readouts
Compact and lightweight
10 button user panel
Acceptable user radiation exposure scale
Can set audible click to silent mode
Onboard storage for up to 32,000 readings
10 year battery life with inexpensive factory replacement.


Recessed display can be difficult to read without backlight
Small tube may underperform at low level radiation
Battery not user replaceable (Note: a rechargeable version is available)
Fragile construction without adequate shock resistance



Made in Germany, the Gamma-Scout Online comes standard with nearly all the bells and whistles you’d expect for low to high level radiation detection. Adding to this, it can store an abundance of data, and it can monitor real-time to a PC. If you’re looking for a high quality and versatile Geiger counter where environmental monitoring is important, the Gamma-Scout Online Geiger counter is a unit worth considering.



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