Compact device intended for ambient dose equivalent rate and ambient gamma and X-radiation dose equivalent rate measurement, as well as for measurement of beta particle flux density on contaminated surfaces. In search mode it measures count rate in counts per second.
Device operating principle is based on the process of count rate measurement of impulses, generated in Geiger-Muller counter tube under the influence of X, gamma and beta radiation.
Count rate is converted automatically into measurable physical values throughout the range. Energy compensating filter allows correcting energy dependence of sensitivity efficiently in entire energy range of photon radiation.
Microprocessor-based unit is responsible for controlling the radiation monitor operating modes, calculations, storing and displaying measurement results and for self-checking function.
Rated sensitivity of each measurement range sets up automatically during calibration procedure.
To facilitate the process of surface contamination evaluation the radiation monitor can be secured in a holder.
Standard monitor sensitivity response upon maximum beta spectrum energy at measuring beta radiation flux density
Standard energy response of monitor sensitivity respect to 137Cs gamma radiation of 662 keV
Standard sensitivity response upon gamma radiation incidence angle respect to the calibration direction
|Ambient gamma and X radiation dose rate equivalent indication range||0.01 µSv/h...10 mSv/h
or 1 µrem/h...1 rem/h *
|Ambient gamma and X radiation dose rate equivalent measurement range||0.1 µSv/h...10 mSv/h
or10 µrem/h...1 rem/h *
Ambient gamma and X radiation dose equivalent indication range
|1 nSv...100 mSv
or 0.1 µrem...10 rem *
|Ambient gamma and X radiation dose equivalent measurement range||0.1 µSv...100 mSv
or 10 µrem...10 rem *
|Beta particles flux density (or count rate) measurement range||10...1·104 particle/min·cm2
(or 0.1...1·104 cps) *
|Intrinsic relative error of dose rate measurement in the range from
0.1 µSv/h to 10 mSv/h (10 µrem/h...1 rem/h)
|X and gamma radiation energy range||20 keV...3 MeV|
|Spectrum maximum energy range of registered beta particles||155 keV...3.5 MeV|
When beta particles flux density is measured for 90Sr+90Y
To 90Sr+90Y beta radiation
|Response time for dose rate measurement
(for dose rate ≥1 µSv/h)
(accuracy error ≤±10%)
|Radiation overloading||Radiation monitor can withstand 100-fold rise of dose rate measurement and beta particles flux density upper range limit for 5 minutes with readings not lower than maximum|
|Continuous run time||≥500 h|
|Working temperature range||-20°C...+55°C|
|Relative humidity with air temperature ≤35°C without condensation||≤95%|
|Drop protection||From ≤1.5 m to hard surface|
|Power supply||2 x AAA-size batteries (LR 03) or 2 x AAA-seize rechargeable cells with nominal voltage 1.2 V|
|Overall dimensions||110x60x38 mm|
* Units of measure are chosen during ordering procedure and cannot be altered later.