Mastodawn

Now that's a toy you don't stumble across very often! Not sure what I'd do with it, but others may have a use: https://www.radiacode.com/

Radiacode – Portable Radiation Detector, Dosimeter & Spectrometer

Radiacode is a fast, portable radiation detector, dosimeter, and spectrometer with real-time analysis. 20× faster than Geiger counters, it identifies isotopes, tests food for contamination, and supports research and safety.

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Aussiemandias

@cstross I like these for reasons I don't fully understand. https://support.acurite.com/hc/en-us/articles/1260802414529-Lightning-Detection-Sensor

Lightning Detection Sensor

The AcuRite Lightning Detection Sensor includes the capability to monitor temperature, humidity, and lightning. The Dashboard will update data every 5 minutes and will include the last data packe...

AcuRite