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Plug-In Power and Energy Monitor Meter | 
 enlarge | Brand: Power Accessories
Category: CE
Buy New: £9.95
New (3) from £9.95
Rating:  5 reviews
Sales Rank: 766
Media: Electronics
Shipping Weight (lbs): 0.5
Dimensions (in): 5.9 x 3.4 x 2.8
MPN: SEC0956407
Model: SEC0956407
EAN: 5000157067029
ASIN: B000Q7PJGW
Availability: Usually dispatched within 1-2 business days
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| Features:
| • | LCD Display | | • | Range 0-9999 KWh |
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| Similar Items:
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| Editorial Reviews:
Product Description
Measures voltage, amps, watts, volt-amps, frequency and power. Ideal for checking how much power your home appliances are using antime. * POWER AND ENERGY MONITOR * Colour:White * Current, RMS max:15A * Depth, external:36.7mm * Digits, No. of:4 * Display:LCD * Frequency, supply max:63Hz * Frequency, supply min:47Hz * Length / Height, external:130mm * Pack Quantity:1 * Pins, No. of:3 * Power consumption:20VA * Temp, op. max:40 C * Temp, op. min:5 C * Voltage, supply AC:250V * Voltage, supply max:250V * Voltage, supply min:180V * Weight:145g * Width, external:60mm
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| Customer Reviews:
 Accurate January 7, 2009
Manzoku (UK)
I've had one of the other meters (a Brennenestuhl) for 3 years, and was puzzled when it reported the standby power of my new Sony TV as 11.85 Watts, with a power factor (cos Phi) of 1.0. Sony say the standby power is 0.7 Watts, and I'm sure Trading Standards would be on to them quite quickly if the true figure was so wildly different.
I bought one of these Plug-In Power and Energy Monitor Meters after reading the other reviews (thank you, Howard Wright), and was not too surprised when it gave a reading of 1 Watt for the Sony TV (readings are to the nearest Watt). A pretty good example of the difference between 'precision' and 'accuracy' - 11.85 Watts is very precise but hopelessly inaccurate. 1 Watt is not very precise but is accurate enough to be useful.
There were similar huge discrepancies between the two meters with other appliances drawing small amounts of power (but which can add up).
It may not have a battery, and it's certainly awkward to read without an extension cord, but it's the best one available at the moment.
Simple to use, accurate power/energy measurements September 21, 2008
Howard Wright (Malvern, Worcs. United Kingdom)
28 out of 29 found this review helpful
This energy and power monitor does what it says and does it pretty well. I tried two different plug-in meters and this one was by far the best.
I didn't bother with any of the devices that are attached to the live cable next to the house's main electricity meter, as these can't measure actual power consumed (i.e. what you're billed for). Only plug-in meters can give you an accurate measure of this, though of course you can't use them to directly measure e.g. showers or cookers as they don't have a plug (with a little effort though, you can use the meter to work out how much energy one revolution of your normal electricity meter corresponds to, which you can then use to measure consumption for items like showers that don't have a plug).
The meter is able to measure low currents and low powers fairly well, so low-consumption appliances or devices on standby can be measured accurately (unlike the other meter I tried: Power & Energy Monitor by Brennenstuhl). It measures current (A), actual power (W), apparent power (W), power factor, total energy (kWh) and usage time, and you can view any of these values within one or two button presses (some buttons toggle between two measures). The usage time measured doesn't depend on the current drawn by the appliance you're measuring, so for fridges/freezers that switch on and off, you see the total usage time which makes it easy to work out typical (average) power consumed.
The meter doesn't have batteries, so you have to read the measurements while it's plugged in. This is rarely a big problem, but occasionally you might have to get under a desk to get to the plug socket and the meter (you can always use an extension lead to help with this).
All the measurements are updated about every second, so you can see how power usage varies for things like TVs and PCs. Power values are shown to the nearest Watt, and the meter seems to give reliable readings at the bottom end of the range (1-5W). You can even look at apparent power and the power factor to get an estimated value of actual power that's not rounded up (e.g. apparent power of 3W, power factor 0.5 means actual power is 1.5). Measuring a low-energy light bulb rated at 11W gave an actual power reading of 11W, so it seems to give accurate readings. After measuring all appliances in the house, estimating power usage for the cooker/shower and estimating the amount of time each item is used on average, I got a total figure that matched well with our actual average daily usage. It was then easy to see how energy could be saved by using some appliances more carefully and by cutting down on standby.
Overall: a useful tool for measuring the power used by household appliances (when active or on standby), easy to use, accurate measurements of actual power consumed (including low currents/powers). Ideal for identifying the most energy-greedy appliances, and for working out where energy savings can be made.
 Get a meter with memory June 13, 2008
R. Simons (Bedfordshire, England)
26 out of 29 found this review helpful
I was disappointed with this meter because it only registers the energy consumption while it is plugged in. A momentary power cut or someone turning the socket off loses the measurements which have been made. This means that at the best of times you have to read the measurements squatting on the floor (or use an extension cable): you cannot remove the meter from the socket before reading it.
I was also doubtful about its ability to measure low currents, e.g. the power consumption of transformers used for low voltage devices when those devices are switched off (energy is still consumed in the transformer's primary circuit, which is why it remains warm).
After about 6 months the device stopped working. I replaced it with the Brennenstuhl meter, which has batteries and is to this device as a BMW is to a Lada.
Don't waste your time and money on this meter: get one which uses batteries and which therefore retains its measurements when disconnected from the mains.
Useful device but no memory March 24, 2008
Mr. James Morrison (Stornoway, Scotland)
16 out of 17 found this review helpful
A useful meter for measuring electricity use on a device basis. Its interesting to compare different heaters, computers there can be significant differences between different models. For example a 14" Sony ~35 watts while a 17" Dell laptop is ~65 watts
Although if you unplug the monitor you lose the total kwh so be sure to plug it into an easily visible socket, there are more expensive meters which have a small watch battery to store the total kwh.
Excellent Device January 2, 2008
Paul (Hertfordshire UK)
45 out of 49 found this review helpful
This Power meter tells you, the electrical current (in amps with 2 decimal places), voltage, power factor, frequency (in HZ), watts and KWhs used. I find it quite useful. I was able to reduce the standby power used by my PC. I was also able to upgrade my video card and save about 10 watts compared to my old card.
It was interesting to see that on standby, my microwave oven uses about 0.4A, but the power factor is so low that only 4W is actually consumed.
Examples of use:
1. Plug in your Combination microwave oven. Cook your favorite dish, see the exact KWhs consumed to two decimal places. You quickly see that the cost of electricity is typically 2% to 5% of the cost of the food.
2. A device consuming 10 Watts in standby is costing about 6 per year at 8p/kwh. But some older devices use 40 Watts in standby mode. It is as well to know if this is the case.
3. How much does energy does the pond pump or the dehumidifier really use?
4. How much energy does your router consume?
5. How much energy do you really save at 30C compared to 40C in your washing machine?
To me, as a physicist, most of the global warming scare stories are as credible as the book of Genesis, but wasting resources is silly and this device lets you quickly make informed choices. It's one disadvantage is that you must disconnect and reconnect your device in order to measure the consumption.
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