I planned to use one of my older projects, a PIC16F84-based radiation detector.

Until I found this army-issued monster:

Left side, top: green detection tube (unknown code) plus vacuum-tube-based amplifier.

Right-side (top) meter + dial, and some germanium-based transistors for high voltage connector.

Detector:

from left: detection tube, then a 6J1J lateral contacts, pass-through-hole pentode, and two 6J45B subminiature tubes. There is also a long long 4.6GigaOhms resistor, I will try to make a closer photo of that.

Detector does not work with cover removed, it is too sensitive.

This detector will stay under the car to monitor the radiation while driving and log the data - only when needed. Display panel stays in the car - under the console for now:

Radiation level is also displayed on the diagnosis screen - second column, third from bottom:

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kernel panic: improbability coefficient below zero