作为大楼消防必不可少的设备 :感烟火灾探测器得到越来越广泛的应用。目前 ,感烟火灾探测器中有一种叫作离子感烟火灾探测器。它是应用烟雾粒子改变电离室内电离电流的原理而实现火灾报警的探测器 ,内含放射源2 4 1Ａｍ ,此类探测器如密封不好 ,造成射线泄露 ,就会给某些人群带 As an indispensable building firefighting equipment: Smoke detectors are more and more widely used. At present, there is a smoke detector called ion smoke detector. It is the application of smoke particles to change the ionization chamber ionization current principle and the realization of fire alarm detector, containing radioactive sources 2 4 1Am, such as the detector is not sealed, resulting in ray leakage, it will give some people with the band