ERICKHILL RT-300 3-in-1 EMF Meter

 
• 3-IN-1 EMF METER, THREE READINGS AT ONCE — measures electric field (EF), magnetic field (MF) and radio frequency (RF) simultaneously. No switching modes, no missed readings. One sweep tells you what a router, microwave, TV, laptop, smart meter or wall wiring is actually putting out. Ranges: EF 1–2000 V/m · MF 0.01–200.0 µT (0.1–2000 mG) · RF 0.01–200.0 mW/m².
 
• TRI-AXIS MAGNETIC SENSOR FOR STABLE MF READINGS — the magnetic field is measured on all three axes (X/Y/Z), so you get a consistent number without twisting the meter to hunt for the "right" angle. Electric field and RF are single-axis: just point the front sensing area at the source.
 
• 3-COLOUR SCREEN + AUDIBLE ALARM, READABLE AT A GLANCE — the large backlit LCD turns green, orange or red as levels rise, backed by an audible alert. You don't need to know the units to read the result.
 
• LIVE TREND GRAPH, DATA HOLD & MAX — a real-time trend bar under each reading shows whether a level is climbing or falling as you move, so you can trace a signal back to the exact cable, appliance or antenna causing it. AVG/VPP switches average and peak, Data Hold freezes the screen, MAX keeps the highest value of the sweep.
 
• USB-C RECHARGEABLE, POCKET-SIZED, READY WHEN YOU ARE — built-in 3.7 V lithium-ion battery, standard USB Type-C charging, no disposable cells to buy (5 V/1 A charger not included). Rubberised grip and one-handed operation suit home checks, office desks, distribution boards and outdoor mast checks — and it's a long-standing favourite for ghost hunting.

Alarm thresholds

 
• Green — SAFE: EF < 40 V/m · MF < 0.12 µT (1.2 mG) · RF < 10 mW/m²
 
• Orange — ALERT: EF < 400 V/m · MF < 0.4 µT (4.0 mG) · RF < 50 mW/m²
 
• Red — AVOID: EF > 400 V/m · MF > 0.4 µT (4.0 mG) · RF > 50 mW/m²

Where people use it

 
• At home: bedrooms, cots, kitchen appliances, Wi-Fi routers, smart meters
 
• At the desk: laptops, monitors, chargers, docking stations
 
• Around the property: distribution boards, wall wiring, outdoor mast and substation checks
 
• Finding wireless devices: locate active routers, phones and other RF transmitters
 
• Ghost hunting: track unexplained field spikes during paranormal investigation

FAQ

Which wireless signals does it cover?
The RF band is 50 MHz–3.5 GHz. That covers 2.4 GHz Wi-Fi, Bluetooth, DECT phones, most mobile bands and 5G sub-6 up to 3.5 GHz (n78). It does not reach 5 GHz Wi-Fi or 5G mmWave.

Do I need to switch modes between EF, MF and RF?
No. All three are measured and displayed at the same time.

What frequencies do the EF and MF readings cover?
30–1000 Hz, which includes 50 Hz and 60 Hz mains wiring and household appliances.

Does it switch itself off?
No — power off manually with a long press, so a reading is never lost mid-measurement.

Is it suitable for beginners?
Yes — the colour-coded green / orange / red bands mean you can interpret a reading without knowing the units.

The RT-300 is a measurement instrument for consumer and hobby use. It is not a calibrated reference instrument and is not a medical device.

• 1 × ERICKHILL RT-300 EMF meter
• 1 × USB-C charging cable
• 1 × User manual

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