![AE1S Science and Engineering Blog: Ludlum GM Counter Calibration for accurate CPM rate using a Function Generator AE1S Science and Engineering Blog: Ludlum GM Counter Calibration for accurate CPM rate using a Function Generator](https://1.bp.blogspot.com/-hdRS4XVtm1o/YC8MDFrWB1I/AAAAAAAAOaM/B-XQLqiq1YAoBl1E8lbV0oM7571Tw9rwwCLcBGAsYHQ/s2048/20210217_164505.jpg)
AE1S Science and Engineering Blog: Ludlum GM Counter Calibration for accurate CPM rate using a Function Generator
![Images SI GCA-06 Professional Digital Geiger Counter - Radiation Monitor with Internal GM Tube - NRC Calibration Ready- 0.001 mR/hr Resolution -- 1000 mR/hr Range: Science Lab Geiger Counters: Amazon.com: Industrial & Scientific Images SI GCA-06 Professional Digital Geiger Counter - Radiation Monitor with Internal GM Tube - NRC Calibration Ready- 0.001 mR/hr Resolution -- 1000 mR/hr Range: Science Lab Geiger Counters: Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/61xXDlhaZDL._AC_UF894,1000_QL80_.jpg)
Images SI GCA-06 Professional Digital Geiger Counter - Radiation Monitor with Internal GM Tube - NRC Calibration Ready- 0.001 mR/hr Resolution -- 1000 mR/hr Range: Science Lab Geiger Counters: Amazon.com: Industrial & Scientific
![GCA-07W-C Professional Digital Geiger Counter - Radiation Monitor - with External Wand - ANSI Certification Ready- 0.001 mR/hr Resolution - 350 mR/hr Range: Amazon.com: Industrial & Scientific GCA-07W-C Professional Digital Geiger Counter - Radiation Monitor - with External Wand - ANSI Certification Ready- 0.001 mR/hr Resolution - 350 mR/hr Range: Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/6107H8u2HqL._AC_UF1000,1000_QL80_.jpg)
GCA-07W-C Professional Digital Geiger Counter - Radiation Monitor - with External Wand - ANSI Certification Ready- 0.001 mR/hr Resolution - 350 mR/hr Range: Amazon.com: Industrial & Scientific
![Nice, safe, low-level (~1600-1700 CPM) Uranium glass token / check-source for your "pancake" Geiger Counter. (found on eBay) : r/Radioactive_Rocks Nice, safe, low-level (~1600-1700 CPM) Uranium glass token / check-source for your "pancake" Geiger Counter. (found on eBay) : r/Radioactive_Rocks](https://preview.redd.it/833q95co7jb81.jpg?width=640&crop=smart&auto=webp&s=01ef76cffffb2f0d814f66bebb4f5465960a94e6)