Manyi 1pc Ion Chamber Metal Geiger Counter Check Test Source Smoke Detector Sensor

Specification: Brand new Model: NIS-07 Material: Metal Color: Silver Size: approx. 28*16*37mm Ionization Chamber Specification, Parameter: Outer electrode and the source electrode voltage ( VDD supply voltage ): 9V Environment temperature: 20 ± 3℃: close to atmospheric pressure standard atmospheric pressure, clean air Collecting electrode equilibrium potential: 5.5±0.3V Collecting electrode potential with the smoke concentration change Light reduction rate was 1% feet: 0.6V Light reduction rate was 4% feet: 2.2V Insulator leakage current ( Max. ): 0.5Pa Capacitor ( collection of extreme outer electrode + to the source base ): 6pF Ionization Source Characteristics and Radiation Safety Performance: Ionization chamber fitted with a high performance and low activity of Am-241 ionization Ionization source activity: 0.5uCi ( 18KBq ) 0.8uCi±10% ( 30KBq±10% ) Ionization source a spectroscopy: peak: 4.5MeV ± 10%, FW HM<0.7MeV Safety grading standards ( GB4075, IS02919 ) C64444 Ionization chamber radiation dose rate at 25cm: 0.03mGy/ ( 1mGy value lower than population dose standard ) Feature: Great source for checking gamma only sensitive Geiger counters. Can be used to test gamma spectrometers as well. Add a nice "hot" piece to your collection which emits alpha and gamma radiation. SBM-20 tube based Geiger counter indicates 140 Counts per minute from this source with gamma filter applied (approximately 80 uR/h or 0.8 uSv/h accordingly). Fine workmanship and good performance. With high corrosion resistance. Small in size. Stable and reliable. Convenient to install. Easy to use. Durable in use. Package included: 1 x Smoke Detector Sensor Note: Please allow 1-3mm errors due to manual measurement. Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.