Radiometer `` SRP-1a ''.
Dosimeters, radiometers, roentgenometers and other similar devices.The SRP-1a radiometer was presumably produced since 1960. The device is a highly sensitive radiometer with a scintillation counter and is designed to register gamma radiation. It is used to search for deposits of radioactive elements in pedestrian gamma-ray imaging; it can be used when working with tagged atoms in various fields of science, technology and industry. The entire measurement range of 10 ... 1250 μR / hour) is divided into 3 subranges. With the help of a slotted regulator, the upper measurement limit can be extended to 2500 μR / hour. The sensitivity threshold of the radiometer is 5 seconds, no more than 2 μR / hour at a gamma background level of 8 μR / hour. The radiometer is sensitive to gamma radiation with energies above 50 keV and beta radiation with energies above 2 MeU. Measurement error under normal conditions of temperature and humidity is not more than ± 10% of the reading and ± 2.5% of the scale. Operating temperature range from -20 to + 40 °. The device is operational under conditions of relative humidity up to 98% with an additional error of no more than ± 10% of the reading. Power supply from 4 elements of 1-KS-Z type. The anode circuits of the lamps and PMTs are powered from the same sources using voltage converters based on crystal triodes. The supply of the power supply kit ensures the operation of the device for 50 hours. The weight of the device set is about 4 kg.