Vintage USSR keychain radiation detector Biri-1 based on SBM-10 ultrasmall tube

Description: The BIRI-1 (but maybe its some more modificated version) keychain indicator of radioactive radiation is designed to warn of all cases of radiation hazard, as well as to assess the power of gamma radiation, identify radioactive contamination of the area with beta-active radionuclides and detect radioactive contamination of food, clothing, premises, and feed.The estimated level of the exposure dose of X-ray and gamma radiation is from 10 μR/h to 3000 μR/h.Duration of continuous operation under natural background conditions at an ambient temperature from 0° C to +35° C:— from freshly charged batteries — at least 50 hours;— from RC53 elements with an unexpired shelf life — at least 200 hours. by the way its based on sub-miniature radiation counter SBM-10 that have next characteristics: Technical characteristics of SBM-10: Operating voltage - 400 V. Counting characteristic plateau length - not less than 100 V. Beta radiation sensitivity spread - ±20%. Counting start voltage - from 260 V to 320 V. Counting characteristic plateau slope - 0.15 %/V. SBM-10 dosimetric characteristics: - maximum count rate (Nmax) at 1 μR/s - from 560 imp/min to 840 imp/min; - natural background level (Nph) - 8 imp/min; - maximum dose rate (Pmax), short-term - 50 R/h. Sensitivity to gamma radiation from a 137Cs source at 10 μR∙s-1 - from 9.6 imp∙μR-1 to 10.8 imp∙μR-1. Amplitude of voltage pulses - not less than 20 V. Insulation resistance between terminals - not less than 100 MOhm. Service life (number of pulses) of the SBM-10 counters - not less than 1010. Overall dimensions: - diameter - not more than 6.01 mm; - length - not more than 26 mm. Weight - not more than 0.9 g. Operating conditions of the SBM-10: Ambient air temperature - from -50° C to +60° C. Climatic version - UHL.

Price: 90 USD

Location: Vinnitsa, Vinnitskaya obl.

End Time: 2024-12-11T17:16:41.000Z

Shipping Cost: 11 USD