GAMMA-1S/NB1-04

Description

Real-time monitoring as part of radioactive reconnaissance mobile laboratories
Environmental monitoring of various objects for contamination with gamma emitting radionuclides, also as part of mobile radiological laboratories
Radiation monitoring of areas close to radiation hazardous facilities: nuclear power plants, nuclear fuel cycle facilities, military sites, etc.

Gamma detecting device based on a Ø76×76 mm NaI(Tl) crystal
Stabilization of measuring path based on a special LED with gain temperature correction
Digital processing of signals
RS-485 interface to transfer data from the detecting device to a PC
Extended temperature range
Applied spectra processing algorithms ensure high reliability and validity of results

Range of registered beta gamma energies	0.05 to 3 MeV
Activity measurement range for a Cs-137 radionuclide	8 to 1·10⁵ Bq the lower limit of the measured activity range is given for measurement time of 1 hour and point measurement geometry
Range of gamma dose rate measurement with the basic tolerable relative error of ±20 %	0.1 to 100 μSv/h
Relative energy resolution for the 662 keV gamma line (Cs-137)	8 % max
Absolute efficiency of gamma-quanta registration with energy of 662 keV (Cs-137) at a distance of 25 cm from the source to the detector	0.001 min Bq⁻¹s⁻¹
Maximum statistical load	1.5·10⁵ cps min
Integral non-linearity	±1 %
Number of channels	1024
Limits of tolerable relative error for activity measurement (Р=0.95)	±(10 to 50) %
Time instability over the 24-h period of continuous operation	1 % max
Continuous operation when operated from external power supply	unlimited
Operating mode setting time	30 minutes max
Power supply	9-18 V DC, 1.5 V·A (UDS-GC-76×76-485-T)
Enviromental	–20 to +50 °С, 95 % at +35 °С and lower temperatures without moisture condensation
Dimensions	Ø116×345 mm (UDS-GC-76×76-485-T)
Weight	4 kg (UDS-GC-76×76-485-T)

Complies with the requirements of the Technical Regulations of the Customs Union on safety of low voltage equipment (TR CU 004/2011), Technical Regulations of the Customs Union on electromagnetic compatibility of technical means (TR CU 020/2011)the Customs Union Technical Requirements “Safety of Low Voltage Equipment” (CU TR 004/2011) and “Electromagnetic Compatibility of Technical Means” (CU TR 020/2011)
Registered in the State Register of Measuring Instruments under No 77614-20

Activity of radionuclides in investigated samples. Measurement procedure for gamma spectrometers using the SpectraLine software”. Number in the Federal Information Fund for Ensuring the Uniformity of Measurements is ФР.1.40.2014.18318
Procedure for measuring gamma emitting radionuclides in investigated samples using gamma spectrometers with SpectraLine and Nuclide Master Plus software Number in the Federal Information Fund for Ensuring the Uniformity of Measurements is ФР.1.38.2022.43932
Procedure for measuring the activity of gamma-emitting radionuclides in waste containers using a gamma spectrometric complex with the LSRM SpectraLine and EffMaker software . Number in the Federal Information Fund for Ensuring the Uniformity of Measurements is ФР.1.40.2019.35796