Description:100% Brand New and High Quality !Specification:1) Ionization source characteristics and radiation safety performance:2) The ionization chamber fitted with a high performance and low activity of Am-241 ionization3) Ionization source activity: 0.5uCi ( 18KBq ) 0.8uCi±10% ( 30KBq±10% )4) Ionization source a spectroscopy: peak: 4.5MeV ± 10%, FW HM<0.7MeV5) Safety grading standards ( GB4075, IS02919 ) C644446) Ionization chamber radiation dose rate at 25cm: 0.03mGy/ ( 1mGy value lower than population dose standard )7) Ionization chamber specification, parameter:8) Conditions: outer electrode and the source electrode voltage ( VDD supply voltage ): 9V9) Environment temperature: 20 + C: close to atmospheric pressure standard atmospheric pressure, clean air10) Collecting electrode equilibrium potential: 5.3~6.5V11) Collecting electrode potential with the smoke concentration change12) Light reduction rate was 1% feet: 0.6V13) Light reduction rate was 4% feet: 2.2V14) Insulator leakage current ( Max ): 0.5Pa16) Capacitor ( collection of extreme outer electrode + to the source base ): 6.0pFMaterial: MetalColor: SilverSize: 3.8*3.8*2.cmPackage Includes:1 x Smoke Detector Sensor