Dirty Electricity Meter by Trifield - Model EM100 - EMI Power Line Noise Analyzer - Know Your Electricity @ Home, Office, Shop - Made in USA by Alphalab, Inc.

As Described. Works Great. Chasing down electrical gremlins is always a fun time

I bought this product while looking to improve the powerline noise situation in my home office. I have many electronic devices powered from the same line - computers, monitors, chargers - that spew noise back and negatively affect the audio quality of desktop DACs and headphone AMPs. I found Trifield EM100 to be an equally helpful tool in measuring the line noise level and discerning between various available filter products. I wish it had a button or switch to turn OFF its speaker for those of us who keep it plugged in 24/7. Other than that, I see absolutely nothing wrong with it.

works as intended. helped me find power noise that was effecting my WIFI network. my WIFI was unstable, is turns out my computer power supply was pulsing at 450+. Located and isolated power for my computer. now My network is good averaging between 75gb to 150gb with 5g internet. before I was getting about 20gb or worse.

Who ever used it once and returned it forgot to put the power cord back in it.

My house is over 90 years old and the mains power in it is very dirty. So dirty that the music playback was ruined by the high noise floor for any of my audio devices, unless an audio-grade line conditioner was used. But the new meter showed a rather low reading of around 40 for the wall outlets in the house. Does that mean the line power is actually clean and all my devices have malfunctioned? More confusingly, the meter showed a higher reading between 60-100 for the line conditioners I used. Does that mean the power from these line conditioners' outlets is dirtier?

work as advertised.. even found a new AM radio station i like through the wiring

Works as described,. Find the issue

wasted money