Magnetometer not present on this device.
Flip PWR to run the power-on self test. Headphones recommended.
← ExitA Geiger-style counter whose click rate follows magnetic intensity, built as a late-1990s instrument: segmented displays, analogue meters, rocker switches, a power-on self test and a DOS-style diagnostics terminal. Clicks come from an AudioWorklet using Poisson arrivals with a tube dead time, so the rhythm behaves like a real counter rather than a metronome.
The count responds to your device magnetometer where one exists and to a clearly labelled simulation where it does not. A rising rate means the measured field is changing; it is not a measurement of radiation and not evidence of anything.
No. A Geiger counter measures ionising radiation with a gas-filled tube. This scanner borrows only the sound and behaviour: random clicks with a dead time, the way a real tube cannot register a second particle for a moment after the first. The rate is driven by your phone’s magnetometer.
They follow a Poisson process, like real radioactive decay counts. Even at a steady rate, the gaps between clicks vary randomly, so the rhythm sounds natural instead of mechanical.
It responds to changes in the magnetic field near your device — metal, magnets, wiring and appliances. A rising count means the field changed, and the instrument cannot tell you why.
They use the same sensor. The EMF Meter shows readings in milligauss or microtesla; the Anomaly Scanner turns them into a count rate you hear, which is easier to follow while you walk around.
This is an instrument and a sound tool, provided for entertainment and experiment. It describes what it measures and does not identify the cause of anything it shows.
Also available as an Android app: Anomaly Scanner — Find Portals
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