TriField EM100 EMI Meter · to buy

What it is: Your own TriField EM100 dirty electricity meter, to keep.

What it measures: Dirty electricity (high-frequency noise) on your home's wiring, in millivolts (mV), from 10 kHz to 10 MHz. Plug it into a power point and read the display, and use the speaker to hear the noise.

In the box: The meter, with a US power cord. No batteries needed. Made in the USA by AlphaLab.

You'll need: An Australian power cord to suit the meter, or a US-to-Australia travel adaptor, to use it on Australian power points. Not sure what to get? Email us before you order and we'll help.

Who it's for: Homes with solar, LED lighting or filters to check over time. Hired one and want to keep it? Your hire fee comes off the price if you buy within 14 days.

Delivery: Please allow 1 to 2 weeks.

Quick start card: Download the TriField EM100 quick start card (a one-page PDF to print and keep with your meter).