GGreg20_V3 Ionizing Radiation Detector

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/

We’ve noticed a high interest in our products, with many users actively joining the waitlist on Tindie. As you might have already learned from our Tindie store update, the platform stopped…

Read the full article:

https://iot-devices.com.ua/en/where-to-order-ggreg20-v3-geiger-counter-not-on-tindie/

We have created a Fritzing part for the GGreg20_V3 Geiger counter module. Now Fritzing users can easily create schematics for their devices that include the GGreg20_V3.

See the full article:

https://iot-devices.com.ua/en/ggreg20_v3-fritzing-part/

Find the exact mounting dimensions for J305 and SBM20 tubes on the GGreg20_V3 Geiger counter module. Ensure perfect compatibility for your DIY projects. Feel free to choose to buy the module with or without the tube.

Read the full article: 

https://iot-devices.com.ua/en/ggreg20-v3-j305-tube-mounting-dimensions/

October 3, 2025, Kyiv — IoT-devices LLC is pleased to announce the official release of the new external component, ggreg20_v3, for the ESPHome smart home platform. This component significantly simplifies…

Read more:

https://iot-devices.com.ua/en/ggreg20_v3-external-component-for-esphome/

This Sound GGreg20_V3 App companion (hereinafter referred to as the App) for the DIY Geiger counter module GGreg20_V3 was developed by the IoT-devices team to provide a quick and convenient way to get started.

Read more:

https://iot-devices.com.ua/en/meet-the-sound-ggreg20_v3-app-for-android-on-google-play/

Here's an example for the GGreg20_V3, sending radiation levels right to your smartphone app using BLE (Bluetooth Low Energy)! This part dives into the first piece of the project: setting up the ESP32 as a BLE Server with the GGreg20_V3 as a sensor.

Read more:

https://iot-devices.com.ua/en/ggreg20-v3-ble-enabled-geiger-counter-esp32-esphome-part1/

The new GGreg20_V3 board is supplied in black color. This is probably already the tenth generation, which received an updated circuit for smoother high voltage regulation and limitation of its values. The module also received two stickers: Q.C. and VOID. Read about all this in this article.

Read more:

https://iot-devices.com.ua/en/new-black-ggreg20_v3-board-hv-adjustment-upgrade-and-stickers/

We analyzed the 2024 order statistics in the online store on our website and added order statistics in the Etsy marketplace store to determine which versions of the Geiger counter module GGreg20_V3 are ordered most often.

Read more:

https://iot-devices.com.ua/en/most-frequently-ordered-ggreg20_v3-options-2024/

Our company has conducted a thorough testing of the power consumption of the Geiger counter module GGreg20_V3, intended for use in DIY projects. The purpose of the study was to determine the real power consumption of the module at different supply voltages: 3.3V, 3.7V, 5.0V.

Read the full technical note:

https://iot-devices.com.ua/en/ggreg20_v3-geiger-counter-energy-consumption-testing/