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J305, SBM-20, and LND712 Tubes (Part 2): Geometry Physics, Dead Time Calculation, and Myth Analysis

A project log for GGreg20_V3 Ionizing Radiation Detector

The GGreg20_V3 Ionizing Radiation Detector is a new-generation ready-to-use device with an SBM-20 Geiger tube and pulse counting output

iot-devices-llcIoT-devices, LLC 08/15/2026 at 16:060 Comments

This second part is an attempt to dive into the internal geometry of the J305, SBM20, and LND712 Geiger-Müller tubes, estimate their actual effective volume and cathode area, build a mathematical model to evaluate their Dead Time, and shed light on the blind spots and myths surrounding their specifications

Read the full article:

https://iot-devices.com.ua/en/comparison-of-geiger-muller-tubes-sbm20-j305-and-lnd712-part2/

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