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Dirty Electricity Line EMI Monitor


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The Dirty Electricity Line EMI Monitor measures electromagnetic interference in a single-phase AC power line. No battery needed as it plugs into a wall socket. It immediately displays total line noise in millivolts (range 1999 mV, resolution 1 mV) in the frequency range 10 kHz–10 MHz (the frequency limits at which sensitivity is half of the maximum sensitivity). A speaker plays the sound of the EMI, with amplitude demodulated, in order to identify EMI sources such as AM or shortwave radiofrequency.

Dirty Electricity Monitor

The Line EMI Monitor measures electromagnetic interference in a single-phase AC power line

Fast delivery 48 hours

FREE UK Shipping On Orders Over £150

The Line EMI Dirty Electricity Monitor measures electromagnetic interference in a single-phase AC power line. Its OLED screen displays AC voltage and noise voltage. The speaker emits a sound that increases according to the intensity of the frequency, the more interference the louder the sound.

The EMI monitor can be used to detect dirty electricity levels at home and in other environments. Dirty electricity can tamper the correct functioning of sensitive electrical equipment. Plus it emits electromagnetic fields (EMF) and has been associated with a wide range of health issues. The more dirty electricity on your wiring, the more EMF in your space.

The Line EMI Dirty Electricity Monitor is also a great tool to test dirty electricity filters and see the difference they make in reducing unwanted electrical noise. Hear the noise decrease as dirty electricity filters are set up.

This meter is easy to use as you simply have to plug it into a power socket and the electronic display will show readings in millivolts (mV), a standard electrical unit of measure.

The dimensions of the device are 132 X 91 X 41mm and it weighs 150g. It comes with a detachable two-core power 0.8 m-length cord and it plugs directly into an electrical outlet.

Operating Voltage: 85-300 VAC 50/60 Hz.

Voltage Reading: 85-250 VAC; Accuracy +/- 1 VAC

Line Noise Range: 0.1-1999.9 mVp-p AC (differential)

Line Noise Accuracy: +/- 8% @ 20 kHZ to 2 MHz; within a factor of 2 from 10 kHz to 10 MHz

Input voltage: AC 85Vac – 250Vac 50/60Hz (accuracy +/- 1 VAC)

Frequency range: 10KHz – 10MHz

Noise indication: 4 digits yellow and blue two-color OLED digital dot matrix display

All EMF detectors have a specific warranty against manufacturing defects and a return to base warranty depending on its manufacturer. As merchants, we are committed to total customer satisfaction and our free return policy is applicable only when the product arrives in a defective state. Otherwise, the customer shall pay return fees to receive a refund.


If you are a UK customer and suffer from Electrical Hypersensitivity (EHS), then you are eligible for full VAT relief on items for personal use such as Bed Canopies, Sleeping Bags & Bed Sheets. Click here for more details on disability under the Equality Act 2010.

Complete your order as normal and when you are ready to check out, select the Disability VAT Exemption option and fill in the form. The form will be saved in your customer profile and VAT will be automatically deducted in all your purchases. 

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If you have questions or doubts please send an email to: [email protected]