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Electronic Educational Devices
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Identify Which Appliances are Your Biggest Power Hogs
Electronic Educational Devices Watts Up? AC Power Meter
Electronic Educational Devices Watts Up? AC Power Meter
Electronic Educational Devices Watts Up? AC Power Meter
Item# 9055
Price: Normally $95.95 
Hot Deal $87.92
Free shipping on orders over $175 - See Details


  • Determine what it costs to run any AC powered appliance
  • Displays information in true dollars and cents - no need to do the conversions
  • Take it with you when you go appliance shopping for on-site testing

Essential Info

What does it really cost to run that electric water heater or energy-efficient refrigerator? Find out instantly by plugging it — or any other electrical appliance — into Watts Up?, which instantaneously displays the wattage being used, as well as the cost, in actual dollars and cents!

Readings are Easy to Understand
The Watts Up? provides tons of information (see list below), yet it is simple to use. Only six values are displayed in the main modes. Additional information is available in the detail mode. Clear English wording on the LCD is used to describe what is displayed.

Super Fast Response Allows for Additional Data Collection
Watts Up? measures the voltage and current thousands of times a second so it has an incredibly fast response time, enabling you to "see the surge" of power when appliances are first turned on. The peak value display captures this surge so it is displayed even if it happens too fast to see live. The minimum voltage display shows the line quality and voltage dips. Minimum current and minimum watts can be used to monitor variances in appliances that run continuously. Watts Up? also measures true RMS power (including power factor) which is what utilities charge for.


What's Included

  • Watts Up? Power Meter

  • More Info

    • 120 VAC, 60 Hz, 15 amps continuous
      True RMS power measured and displayed
    • +/- 3%, +/- 2 counts of the displayed value for loads above 10 watts
    • +/- 5%, +/- 3 counts of the displayed value for loads below 10 watts (Accuracy is of the displayed value, not the range. Some devices claim a smaller number for accuracy but it refers to the range. For instance, a specification of 0.2% of the range sounds good, but it is actually 3.6% of the display (.02 * 1800 = 3.6), which is a worse accuracy)
    • Main supply voltage fluctuations not to exceed +/- 10% of the nominal voltage
    • Rate can be entered from $0.001 to $2.00 per kilowatt hour, in tenths of a penny
    • Input is via 6' electric cord, output is via outlet on top of meter
    • Indoor use only

    For UL Rating
    • Watts up? is UL listed to standard 3111-1
    • Altitude up to 2000 meters
    • Temperature 50 C to 400 C
    • Maximum relative humidity 80% for temperatures up to 310 C decreasing linearly to 50% relative humidity at 400 C
    • Installation Category II



    Manufacturer:Electronic Educational Devices
    Manufacturer Product No.:Watts Up? Power Meter
    Dimensions: 7" x 4" x 2" (18cm x 10cm x 5cm)
    Weight:1.5 lbs (0.7 kg)


    17 Ratings
    5 star: 59%  (10)
    4 star: 12%  (2)
    3 star: 6%  (1)
    2 star: 6%  (1)
    1 star: 18%  (3)
    Average Customer Rating
    (17 customer ratings)
    Share your thoughts with other customers
    JACOB -- wakefield, MA   2/13/2012
    Easy to use, great documentation.
    Terry Roth -- champlain, NY   2/7/2011
    Its good but fo 110v appliances only. Although the ad even claims 'water heater', I don't know any water heater that does not run on 220 volts so this won't work. Also many heaters, furnaces, washers, dryers, etc are also on 220 and won't be able to be measured with this device and some of these are the biggest draw on your electricity bill. It does work well for any appliance that plugs into the wall toasters, coffee machines, etc I find that what it does is available on less expensive units that do exactly the same thing like Kill-O-Watt.
    WARREN -- hannibal, MO   1/7/2011
    We installed the meter 3weeks ago and so far they are doing what we wanted. They seem to be a good product. We are very happy with them. Thank You fo your help Warren
    LA DANNA -- madison, WI   6/24/2010
    Great Product. The way it was mailed to me confuses me. This is a business address where usps doesn't deliver to. So I it was lost for a day in mailing.
    JESUS -- el paso, TX   1/14/2010
    This product does what it promises to do. The only drawback, and it is a big one, is that it immediately stops working whenever you have a product that you are checking that has a short.The one thing I do have to say here is that Smart Home does stand behind its products. I have had to send this product back two times and both times Smart home replaced it with a new one.
    SONIA -- san nicolas garza, XX   1/7/2009
    Great service! Thank you.
    RICHARD -- livermore, CA   8/23/2008
    Great delivery time, and the watts up ac power meter is just what I expected and more.
    Richard R. -- livermore, California   7/26/2008
    Received my WATTS UP POWER METER within 38 hours after ordering excellent delivery time. It operates as I expected and more, would not hesitate to recommend it to anyone. Good product with a fair price.
    GILES -- newcastle, WA   2/9/2008
    Great service. I will use SmartHome in the future. Thanks!
    JON -- grand haven, MI   10/15/2007
    got them in good order, was easy to place order, everyone is happy, would do it again, thanks
    RICHARD -- grand falls, NB   9/15/2007
    This Power Meter does all I expected of it and more. Honest adverising!!
    DAVID -- san jose, CA   4/23/2007
    This item is terrific.
    LARRY -- santa cruz, CA   4/5/2007
    So far so good. Actually been too busy to do as much with it as I'd hoped, but still managed to measure a freezer and some phantom power supplies...
    JERRY -- gahanna, OH   3/27/2007
    works as advertised
    STEVE -- auburn, CA   3/26/2007
    Simple to use. Works as advertised. Helped me identify where I was wasting electricity and also helped me determine how long my well pump ran each day. This lead to finding a leak. I would highly recommend.
    RICHARD -- pearl river, NY   3/15/2007
    Meter did not seem to work as well as I had hoped. Kept zeroing out data without apparent cause...perhaps user error?? I need to follow-up with user guide to detremine issue. SmartHome experience was EXCELLENT!
    HAL -- santa barbara, CA   10/26/2006
    Exactly what I ordered. No problem.
    ANTONIUS F -- newbury park, CA   10/7/2006
    This is an excellent product for determining power usage of applances.
    WILLIAM -- west plains, MO   3/23/2006
    I have again been very pleased with the products and service I receive when dealing with Smarthome. Don't change.
    TREVOR -- fremont, CA   11/21/2003
    Excellent product, should have bought one of these years ago. Very accurate, tons of useful power-measurement functions, and well constructed. Much better than the cheaper alternatives. Because it showed me that my garage freezer was set too high and running too often (duty cycle measurement) it will have paid for itself in less than 8 months.

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