Item Type: DIY Geiger Counter Kit <br>Material: Circuit Board <br>Gross Weight: 168g / 5.9oz <br>Product Size: Approx.11.3 x 6.3 x 1cm / 4.4 x 2.5 x 0.4in <br>Purpose: nuclear radiation detection <br>Battery: AA 1.5V dry battery (3pcs required) (shipped without battery) <br>Parameters of matching Geiger tube: The pipe is a tin oxide cathode, coaxial cylindrical thin wall structure (pipe wall density 50 ± 10cg/cm2) pulse application halogen tube, which is used to detect 20mR/h~120mR/h, gamma rays and 100?1800 off variables per points of the soft beta ray. <br>Technical Parameter Diameter: Approx.10±0.5mm / 0.4±0.02in <br>Total Length: Approx.90±2mm / 3.5±0.08in <br>Starting Voltage: ＜350V <br>Recommended Working Voltage: 380V <br>Minimum Platform Length: 80V <br>Maximum Platform Slope: 10% 80V (see M4011 below for details) <br>Limit Operating Voltage: 550V <br>Maximum Background Count Rate: 25 times/minute <br>Service Life: ＞1x10^9 pulse<br>1、Applicable: This DIY opening source Geiger counter kit is compatible for radiation detector, please confirm the detector model before use. <br>2、Purpose: Nuclear radiation detection, for detecting 20mR/h?120mR/h gamma rays and 100?1800 off variables per points of the soft beta ray. <br>3、Sound and Light Alarm: This DIY detector has a sound and light alarm function, which will alarm in time when detecting abnormal data. <br>4、GM Tube: The tube is a tin oxide cathode, coaxial cylindrical thin wall structure (pipe wall density 50±10cg/cm2), pulse applied halogen pipe. <br>5、Suggestion: Please remember that building materials may contain natural radionuclides, which is why you should be careful to choose materials when building, because they will pose a great threat to your health, when moving to a new place, you must check there is no radiation.1 x Mainboard<p>4 x Red Gasket</p><p>4 x Small Screw</p><p>4 x Large Screw&nbsp;</p><p>4 x Nut&nbsp;</p><p>1 x Acrylic Plate</p><p>1 x USB Cable</p><p>1 x Geiger Tube</p><p>2 x Wiring</p><p>1 x Battery Box</p>