{"title":"Gravity: Geiger Counter Module Ionizing Radiation Detector","handle":"gravity-geiger-counter-module-ionizing-radiation-detector","url":"/products/gravity-geiger-counter-module-ionizing-radiation-detector","description":"This Gravity Geiger Counter Module detects ionising radiation — including nuclear radiation, X-rays, and cosmic rays — using a large M4011 Geiger-Müller tube. When ionising particles pass through the tube, the module outputs a digital pulse that can be counted by any microcontroller to calculate radiation intensity in CPM or µSv/h.\n\nThe Gravity interface connects directly to Arduino, Raspberry Pi, and other 3.3–5 V boards via a single digital pin. Beyond radiation detection, the random nature of ionising events also makes this module a true hardware random number generator.\n\nKey Features\n\n\nM4011 Geiger Tube – Large, highly sensitive detection tube\n\nDigital Pulse Output – Pull-down signal on each ionisation event\n\nGravity Interface – Simple 3-pin digital connection\n\n3.3–5 V Compatible – Works with Arduino, Raspberry Pi, and more\n\nTrue Random Number Generator – Undetermined ionisation events provide genuine random entropy\n\n\nSpecifications\n\nGeiger Counter Module:\n\n\nSupply Voltage: 3.3–5 V\n\nOutput: Digital (pull-down pulse on detection)\n\nDriving Voltage: ~400 V (generated internally)\n\nMaximum Range: 1,200 µSv/h (theoretical)\n\nModule Size: 107 × 42 mm\n\n\nM4011 Geiger Tube:\n\n\nOperating Voltage: 380–450 V\n\nBackground Counts: ~25 CPM\n\nCPM Ratio: 153.8 CPM per µSv/h\n\nTube Size: Ø10 × 88 mm\n\n\n\nWarning: This product is for educational and research purposes only. It is not a professional measuring instrument and must not be used for radiation dose measurement that directly affects personal safety.\n\n\n\nNote: This module detects ionising radiation only. It cannot detect electromagnetic radiation from microwaves, mobile phones, Wi-Fi, or induction cookers.\n\n\nPackage Contents\n\n1× Gravity Geiger Counter Module (M4011 tube included)\n1× Gravity 3-pin sensor cable\n\n\nResources\n\nProduct Wiki\n","vendor":"DFRobot","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":2421,"title":"Default Title","sku":"DF-SEN0463","price":102.43,"on_sale":false,"in_stock":true,"available_quantity":180,"option1":"Default Title"}]}