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Georadis Systems for Detection Radiation


State-of-art instruments for radiation detection, determination of radioactive sources and measuring their intensities.


The smallest representative of hand held scintillators. Suitable for rapid localization and tracking of radiation sources. Easy to operate. Low power consumption. 


A clear and easy-to-read display and audible indication of changes in radiation levels make RT-20 suitable for routine work when locating sources of radiation.

The unit is also available with an extension.


RT-20 is designed primarily for work in areas where the probability of occurrence of significant radiation sources is high and they can be difficult to access.

Typically, in metal scrap and other waste.

Thanks to its low weight, it is easily portable even in rugged conditions. The dimensions of the device have been minimized, but not at the expense of sensitivity. A NaI / Tl crystal of 1.18 " diameter and 1.18" length and the gamma-ray energy range from 30 keV ensures sufficient sensitivity of the unit even for radiation sources contained in massive shielding or transport containers. Its housing is made of aluminum alloy. Powered by four AA cells. Alkaline and rechargeable cells are also acceptable. A charge controller is located inside the unit.

RT-20T is an identical device, wherein, however, the detector is located at the end of a telescopic arm in its own housing. The housing enclosure is protected against scratches and bumps with a plastic finish on the outside and foam lining on the inside.



The RT-22 model is based on the RT-21 series, the most sensitive from the range of manufactured hand-held radiation detectors.

Compared to its predecessor, it comes with an internal memory for storing measurement data, and Bluetooth connectivity allowing the use of an external GPS module.

Its robust design makes it suitable for hostile climatic conditions. Our bestseller at the time of the uranium panic. Popular with scrap yard owners.


Large NaI/Tl detector. Search profiles recordable in memory. Data transfer via USB or Bluetooth. Well balanced and easy to carry. Robust boot for mechanical protection.


Sensitive localisation of sources of radiation. Widely used in metal recycling and exploration.

The only detector with a NaI/Tl scintillation crystal with a capacity of 104 cm3 weighing less than 3 kg. Its housing is made of aluminum alloy coated with a polyurethane layer.

This protects the device from wear and tear and allows for easy decontamination. The presence of radioactive substances is indicated on a graphic display, and by a piezoacoustic transducer generating alarm signals. Dust and water resistant. Easy one-button operation. Low power consumption and long battery life. Rechargeable AA batteries can be used.

The charger is integrated in the device. An AC adaptor is supplied for charging/powering from the mains, and the unit may be powered from a 12V car socket. Compared to the RT-21 series model, it comes with data memory for data logging of measured profiles. An external GPS module connected via Bluetooth allows the user to add location information to the stored data. The memory capacity allows storage of data for at least 12 hours. The RT-22 series is also available with a telescopic arm. At a customer’s request, an RT-22B model is available fitted with a BGO detector instead of a NaI-Tl detector.



A handheld gamma ray spectrometer with integrated dose meter and neutron identification. High sensitivity, long operating time and high durability in field conditions.

Quick scanning for radioactive materials and reliable identification of radioisotopes. Protection of personnel against the effects of ionizing radiation.


Devices from the RT-30 series are multi-purpose gamma ray spectrometers with added functions for detecting radiation sources, measuring dose rate and identifying

neutrons. They are resistant to water


Low weight and high mechanical resistance makes them perfect for outdoor use in industrial applications, personal protection, tracking illegal movement of radioactive sources and searching for lost ra


The basic model of the RT-30 series is built on a large volume NaI / Tl scintillation detector with a 2" base diameter and 2" height. This ensures the scintillometer's function of determining the location of radioactive materials, identifying radionuclides from the recorded gamma spectra and dose rate within a limited range. The RT-30G model is fitted with the Geiger-Muller tube, thus extending the dose rate meter range up to 1Sv/h. The RT-30N model is equipped with a neutron detector as an addition. This device meets all requirements to be classified as RIID. All three models are provided with a detector mounted on a telescopic arm to ensure sufficient distance of the operator from the radiation source. This includes RT-30T, RT-30GT and RT-30NT models.



Two basic working modes: Survey, for radiation surveying, and Identification, for identifying the detected sources. The Survey mode is combined with simultaneous dose rate measurements. The RT-30N model is provided with continuous detection of neutrons with the function running the whole time the unit is turned on. Energy calibration of the analyzer is carried out continuously throughout the operating time, and only natural background sources are used for the set-up. Monitoring and analysis results are displayed on a graphic display in a well-arranged manner. All acquired data is stored in the unit's memory and can be exported to other devices via USB or Bluetooth. 


RT-30 MkII

Product Specifications



Fast radiation analysis of steel, dust and slag in steelworks. Determining concentrations of potassium, uranium and thorium in building materials and rocks.

Measuring radioactive substances in food, animal feed and environmental samples.


High sensitivity, low operating costs, fast analyses, ease of integration thanks to the SQL database, operable in networks. Wide range of sample containers,

including Marinelli beakers. Large volume o


The RT-50, with the LabCenter program, has obtained type approval and certification for binding measurements of radionuclide activities and concentrations in metal, dust, rock, building materials, foo


The RT-50 series is manufactured in the following models. The basic model is fitted with a 9 cm shielding made ​​of steel. Lead shielding of the same dimensions is available on request. The standard measuring chamber is an aluminum hollow cylinder of 150 mm diameter and 150 mm height, and with a wall thickness of 1.5 mm. The standard measuring chamber may be replaced by a chamber enabling measurement in Marinelli beakers of up to 700 ml, suitable for detectors having a 3-inch diameter.


The RT-50 model with the LabCenter program has been specifically designed to monitor and detect the presence of radiation in metals, metallurgical by-products, geological samples, foodstuff, animal feed, building and many other materials. Extreme sensitivity has been achieved by using a high-volume scintillation detector and supplementing it with massive shielding, allowing radical shortening of measurement time and/or reduction of volumes of the measured samples. In cooperation with the LabCenter program, the core of which is a unique and original method for measuring activities from the gamma-ray spectra, it is possible to accurately measure the activities of mixed samples containing a mix of different radioisotopes. RT-50 is supplied as a complete laboratory system, including a computer and scales.