Metal Geiger counter controller, Test source is a Lionization Chamber with smoke detector or sensor. HIS-07 smoke sensor using radiation from a small amount of Americium-241. This radiation hits dust particles in the air, and the number of these collisions is calculated as the amount of smoke in the air.
Americium emits alpha particles and weak gamma radiation, alpha particles are detected by the casing of the sensor. is completely blocked, but gamma radiation passes freely through the case but is quickly absorbed by the air due to the very low energy of around 60 keV (maximum flux in air 15cm). It is a great source for checking Geiger counters that are only sensitive to gamma, if you have such a meter it will be impossible to test it with other sources that emit only beta particles.
Testing gamma spectrometers It can also be used to. The SBM-20 tube-based Geiger counter displays 140 Counts per minute from this gamma-filtered source (approximately 80 uR/h or 0.8 uSv/h).
Ionization source activity: 0.5uCi ( 18KBq ) 0.8uCi±10% ( 30KBq±10%)
Ionization source a spectroscopy: peak: 4.5MeV ± 10%, FW HM<0.7MeV
Safety rating standards (GB4075, IS02919) C64444
Ionization chamber radiation dose rate at 25cm: 0.03mGy/ (1mGy value lower than population dose standard)
Conditions : external electrode and source electrode voltage (VDD supply voltage): 9V
Ambient temperature: 20 + C: standard atmospheric pressure close to atmospheric pressure, fresh air
Collection electrode balance potential: 5.3~6.5V
Light reduction rate was 1% fit: 0.6V
Light reduction rate was 4% feet: 2.2V
Insulator leakage current (Max): 0.5 Pa
Capacitor: 6.0pF
Material: Metal
Silver color
Dimension: 28 x 16 x 37 mm
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