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How accurate are Kill A Watts?

ybriK
By ybriK
in Power Supplies
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Technically known as "Electricity Usage Monitor" how accurate are these devices?

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http://forums.anandtech.com/showthread.php?t=137169

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I nearly made a complete ass out of myself by commenting and saying its 'kilowatts' (I do an electronic engineering course so when people get that wrong it pisses me off) anyway on amazon it says within +/- 0.2% so pretty dam accurate. 

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5 minutes ago, ybriK said:

Technically known as "Electricity Usage Monitor" how accurate are these devices?

Consumer grade ones aren't crazy accurate and usually overestimate. Professional grade ones are far more accurate.

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It's not as accurate as doing a 4-wire power measurement, but for what they are, they are good enough.

 

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Yea well I'm only going to be using these for PCs anyway, looks like good enough.

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