Instruments

Reads power-frequency electric field strength in V/m, the quantity that reveals energised wiring behind a bed head even when no current is flowing.

A high-impedance millivoltmeter, a wrist or hand electrode and a ground reference: the standard building-biology method for grading bedroom electric fields.

The general-purpose instrument for Wi-Fi, cellular, 5G, smart meters and cordless phones: reports total power density across a wide band in µW/m² or mW/m², with peak-hold and average modes.

Used with an RF meter or analyser to find the bearing of a dominant source, distinguishing a tower on one azimuth from a neighbour's access point on another.

Plugs into a socket and reports high-frequency harmonic content riding on the mains, the quantity used to judge dimmers, LED drivers, inverters and switch-mode supplies.

Measures 50/60 Hz magnetic flux density in milligauss or microtesla — the instrument for wiring faults, service panels, transformers and power lines.

Covers the kilohertz gap between an ELF gaussmeter and an RF meter — the band occupied by induction hobs, EV inverters, solar optimisers and switch-mode supplies.

Measures modulation depth and frequency of a light source, the optical counterpart to dirty-electricity measurements and the metric behind LED comfort complaints.

Any of the above with unattended recording: required whenever the assessment depends on an average, a night-time value or a 95th percentile rather than a spot reading.

A 2.45 GHz probe scaled for the FDA leakage limit of 5 mW/cm² at 5 cm — a range where ordinary consumer RF meters saturate.

A protected coupling that lets an oscilloscope show the actual mains waveform and its harmonic content, replacing a proprietary dirty-electricity index with a measurable spectrum.

Resolves a reading into its constituent services and frequencies — the only way to attribute an RF level to a specific band, operator or device.