2014年11月16日 · This is the quintessential Soviet Geiger Counter tube. 400V operating voltage. 105mm overall length. Gold (brass?) color. Symmetric end caps. Positive terminal is usually marked ‘+’, but if not, it’s the end closest to the CBM-20 marking.

2020年11月2日 · This is the iconic SBM-20 Geiger-Muller Tube used in many DIY Geiger Counter projects. This tube is sensitive to beta and gamma radiation. Each tube is tested and carefully packaged.

2011年3月26日 · Ebay上有卖俄国计数管SBM-20的，大概19刀。 首先，管子的后缀为敏感射线的类型，Gama管只能用来探测Gama射线。 J109参数较少，值得注意的是工作电压较高，接近1000V；背景计数率较大，280CPM。 但对于爱好者已经够用了。 J408的背景计数率较低，为80CPM，工作电压只有109的一半。 虽然本底计数率一定程度上反映了灵敏度，但灵敏度不完全取决于此。 SBM-20 的本底噪声最低，参数最全。 工作电压也是最低的，具有较好的性能。 …

The SBM-20 is one of the most popular GM tubes for hobby Geiger Counter and radiation monitoring projects. It is relatively sensitive and easy to use. There are many example circuits online that will help you build a Geiger Counter using this tube. One example is the MightyOhm Geiger Counter Kit: http://mightyohm.com/geiger

2013年10月19日 · Geiger-Muller tube for gamma and hard beta radiation. The main radiation detection element in the uRADMonitor detectors. This is a moderately sensitive tube.

You can buy just the Geiger Counter kit with a tested, known good SBM-20 Geiger-Muller tube included. You can buy the same kit with all parts except the Geiger tube (in case you already have one).

SBM-20, SBM-20U HARD BETA and GAMMA GM DETECTORS GENERAL SPECIFICATIONS

2021年6月10日 · 盖革-米勒计数器是根据射线能使气体电离的性能制成的，是最常用的一种金属丝计数器。 两端用绝缘物质封闭的金属管内贮有低压气体，沿管的轴线装了金属丝，在金属丝 …

2025年2月2日 · (SBM-20 / SBM20 / СБМ-20 (an. STS-5, SI22G). STS-5, SI22G) for ionizing radiation detection. Purpose of Use Geiger Muller Tube Counters SBM-20 / SBM20 / СБМ-20 (an. STS-5, SI22G) are widely used for radiation detection.

The SBM-20 Geiger-Muller counter is designed to detect hard beta and gamma radiation in radio engineering devices. It is used in the field of radiation monitoring, icing and smoke detectors, as well as in flaw detection. SBM-20 is equivalent to SBM-20-1, STS-5, SI22G. Technical specifications: Ambient temperature: from -60°С to +70°С.