EMF‑01 EMF Meter

EMF Meter

Reads your device magnetometer through the Generic Sensor API, falling back to orientation data where that is all the browser exposes. Readings appear in milligauss and microtesla on a five-band scale with a moving-coil needle, latching LEDs, peak hold and a zero function that learns the ambient field.

Most desktop browsers expose no magnetometer at all. When that is the case the meter says so and runs a clearly labelled simulation rather than presenting invented numbers. A raised reading means the magnetic field near your device changed - it does not identify what changed it.

How to use EMF Meter

1. Open the meter on a phone. Phones have a magnetometer for the compass; most laptops and desktops do not, and the meter will tell you which you have.
2. Press Power. On iPhone you will be asked for motion and orientation access, which is how Safari exposes compass data.
3. Hold the phone still, away from chargers, speakers and metal furniture, and press Zero. The meter learns the ambient field so that what you see afterwards is change, not the background.
4. Choose a sensitivity. LOW ignores small drift; HIGH reacts to modest changes and is easier to trigger by moving the phone.
5. Pick a unit: milligauss (mG) or microtesla (µT). One microtesla is ten milligauss.
6. Use HOLD PEAK to keep the highest reading on screen, GRAPH to see the field over time, and MARK to note a moment in the session log, which you can export.

Tips

• Move slowly. A phone magnetometer reacts to its own orientation near metal, so fast sweeps produce spikes that are about the movement, not the room.
• Before an investigation, walk past a known source — a laptop charger, a speaker, a fridge door — so you know what an ordinary spike looks like on your device.
• Magnetic phone cases and mounts will swamp the sensor. Take the phone out of them.

Questions

Can a phone really measure EMF?

Partly. A phone’s magnetometer measures the magnetic field around it, including Earth’s field of roughly 25 to 65 µT (250 to 650 mG). It reacts well to magnets, steel and nearby electrical equipment. It does not measure radio-frequency radiation from Wi-Fi or mobile networks, or electric fields, and it samples too slowly to resolve the 50 or 60 Hz fields that dedicated meters such as the K-II respond to.

Why does it say no sensor was found?

Most desktop browsers expose no magnetometer. On Android, Chrome provides the most direct access, though some builds keep it behind a flag; iPhones provide compass heading rather than raw field strength. When nothing is available the meter runs a simulation and labels it on the display, rather than inventing numbers.

What is a normal reading?

After zeroing, a still phone in an ordinary room should sit near zero with small flicker. Readings rise near transformers, chargers, speakers, magnets, steel beams and appliances, and when you rotate the phone close to metal.

Does a high reading mean something paranormal?

A high reading means the magnetic field near the phone changed. Wiring in walls, appliances cycling on, a passing car or the phone’s own movement are the usual causes. The meter reports the change; it cannot tell you what caused it.

Should I use milligauss or microtesla?

Whichever your references use. Most paranormal-investigation meters are marked in milligauss; scientific and phone sensor specifications use microtesla. 1 µT = 10 mG.

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.

Related tools

• Anomaly Scanner — A counter that clicks with magnetic intensity, on a 1990s instrument panel.
• Ghost Com — A handheld ghost meter whose needle follows a radio sweep or your microphone.
• Spirit Cam — Nine real imaging modes over your camera, with capture to photo or video.
• EVP Recorder — Records takes, scans them for voice-like segments, and marks what it measured.

Guides

• Can Your Phone Be an EMF Meter? What a Magnetometer Measures

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