盖革计数管(GM管)是工作在盖革-弥勒区的气体电离探测器。因为其放大倍数远大于1，输出脉冲幅度与原始电离无关，所以GM管只能用于脉冲计数，不能进行能谱测量。GM管具有价格低廉，输出型号幅度大，配套电路简单等优点，可广泛应用于α、β、X、γ以及宇宙射线的探测。
| type | Maximum length (inches/millimeters) | Maximum diameter (inches/millimeters) | Recommended working voltage (volts) |
|---|---|---|---|
| 713 | 1.85/47.0 | 0.31/7.9 | 500 |
| 719 | 10.75/273.1 | 0.63/16.0 | 900 |
| 720 | 3.76/95.4 | 0.63/16.0 | 900 |
| 721 | |||
| 725 | 4.28/108.7 | 0.94/23.8 | 900 |
| 7133 | 4.17/105.9 | 0.98/25.0 | 500 |
| 7134 | 1.85/47.0 | 0.36/9.3 | 900 |
| 7192 | 10.25/260.4 | 0.63/16.0 | 900 |
| 7213 | 5.6/142.1 | 0.63/16.0 | 500 |
| 71320 | 1.85/47.0 | 0.36/9.3 | 500 |
| 71332 | 1.85/47.0 | 0.31/7.9 | 500 |
| 71627 | 6.1/154.0 | 0.63/16.0 | 500 |
| 71916 | 10.75/273.1 | 0.63/16.0 | 900 |
| 71917 | 10.25/260.4 | 0.63/16.0 | 500 |
| 72118 | 5.1/129.5 | 0.63/16.0 | 500 |
| 72120 | 5.0/127.0 | 1.35/34.3 | 500 |
| 72121 | 5.0/127.0 | 1.38/35.0 | 900 |
| 72510 | 4.28/108.7 | 0.94/23.8 | 900 |
| 72511 | |||
| 72513 | 8.31/211.1 | 1.37/35.0 | 1200 |
| 72514 | 8.0/203.2 | 1.35/34.3 | 675 |
| 72519 | 4.28/108.7 | 0.94/23.8 | 900 |
| 72523 | 4.28/108.7 | 0.94/23.8 | 900 |
| 72527 | 4.24/108.0 | 0.75/19.1 | 900 |
| 72528 | 4.28/108.7 | 0.94/23.8 | 900 |
| 72538 | 4.22/107.2 | 0.75/19.1 | 900 |
| 72544 | 4.28/108.7 | 0.94/23.8 | 900 |
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