We wondered at @IoT-devices, LLC  what would happen if we took our DIY Geiger counter module - #GGreg20_V3 Ionizing Radiation Detector and put it in a freezer with a target temperature of -23 Celsius together with the ESP32 controller.

Will our sensor work at such a low temperature? Will we see any failures or deviations in the radiation sensor measurements?

My colleagues and I were betting that sooner or later we would get False-Positive pulses at the ESP32 input during strong cooling.

Read full note at:

https://iot-devices.com.ua/en/technical_note_performance_of_diy_geiger_counter_ggreg20_v3_at_low_-temperatures/