n Purpose and Characteristics

This instrument has passed the joint ministerial level appraisal between the National Nuclear Industry Corporation and the Ministry of Chemical Defense of the People's Liberation Army, and has won the second prize for scientific and technological progress in the nuclear industry at the ministerial level.FT648Radon meter is currently an instrument that can directly measure radon concentration and radon progeny without calibration. Once in1989Exhibited at the Chicago Electronics Show in the United States.

This instrument is a portable and highly sensitive radon detector that uses the principle of dual filter membrane to measure radon concentration, and obtains measurement results in real time. The measurement results are not affected by the degree of radioactive balance between radon and its progeny. This method has been selected as the standard method for measuring radon.FT648Using a third layer filter membrane for radon progeny sampling, allowing radon and radon progeny to be sampled separately at the same time. It is suitable for the investigation and research of environmental radon content, indoor radon concentration measurement, accident monitoring, radiation medicine, earthquake monitoring, meteorological research, and environmental monitoring of engineering nuclear facilities.

This instrument has high sensitivity for measuring radon, can directly measure radon without calibration, and can also measure radon and its progeny. Radon and its progeny can be sampled simultaneously, with fast sample change, membrane sealing operation, manual continuous sampling, high accuracy, easy operation, and good repeatability.

n Main technical performance

l Sensitivity: for radon,3.3Bq/m3(95%confidence level)For radon progeny, better than8nJ/m3

l Inherent error: less than30%(Typical value)

l this Bottom: not greater than25Counting·h-1

l electricity Source: Sampling pump Battery:18V

Cadmium nickel rechargeable battery:12V

l Ambient temperature0～40℃

l Detector: Φ65mmZnS(Ag)scintillator

l Sampling pump:30～40L·min-1type

l Decay cylinder volume:14.8L

n Usage environment

l Temperature range:0～+40℃；

l Relative humidity: ≤90%（40℃）

n Dimensions and Weight

l Instrument size: approximately Φ170mm×800mm

l Instrument weight:18kg