Sainsburys Owl Wireless Electricity Monitor £34.98 reduced to £8.74 - HotUKDeals
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Found this INSTORE but wasnt sure if it was a good deal until I got home and checked the price, £23.99 on Amazon with excellent reviews! Guess where Im going back to!

OWL Wireless Electricity Monitor (CM119), provides up to the second information on the amount of electricity you are using in terms of power, cost and your carbon footprint. This means you can see in real time the benefits of turning off electrical devices at home. Whether it's turning off at the plug rather than just using standby, or simply turning off a light, OWL shows you the cash impact of changing your habits and behaviours which could amount to savings of hundreds of pounds per year.

OWL Wireless Electricity Monitor, now features a cumulative memory feature, making it easier than ever to monitor your electricity usage.

By enabling you to see for the first time how much electricity you are using, as you use it, OWL Wireless Electricity Monitor will help you to manage your electricity consumption and your carbon footprint.

Simple to install, OWL Wireless Electricity Monitor easily connects to your electrical supply without the need for an electrician.
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7y, 4m agoFound 7 years, 4 months ago
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#1
Link to the Amazon site with reviews:-

http://www.amazon.co.uk/Owl-Cm119-Wireless-Electricity-Monitor/dp/B001JJCLS0

From reading the box this just clips onto you main electricity supply cable, and then wirelessly sends info to the monitor.
#3


not everyone is on benefits. well not yet anyway
#4
I don't understand the principle of energy monitors. Wouldn't it be just as easy to look at the back of your appliance for energy use and count the avarage running hours? Your electricity meter will also tell you how much total energy you use.

BTW, make no mistake, if your bill goes down the energy companies will simply increase the price to make sure their revenue doesn't go down. We as the consumer loose out, no matter what we do.
#5
Well we use one in work, it's handy at the end of the day to see if anyone has left anything they shouldn't switched on, we know what it is most nights so if its much higher then go back and check.

I think the main idea is to make people aware of what they are using and which products consume the most electricity, if you have a large number of items the difference between leaving them on standby and turning them off at the wall can be quite dramatic
#6
surely when these are at full price the money you may save will be lost against the cost of the monitor
#7
caverncity
not everyone is on benefits. well not yet anyway


dont you know anyone who is?;-)

much more of this government and we all will be very soon.
#8
Which store please?
#9
Have been very (pleasantly) been surprised by the attitude of my teens to ours. They are regularly checking it and then investigating "spikes" - has really been interesting seeing how much it costs to run a hairdryer for example. There is a big difference in consumption of our 2 desktop PC's as well.
It does depend on your tariff - we for example have xxx units at £xxx, then units over the first band are charged at a lower rate -have found no way to set the owl up for this. But by setting it at the higher tariff - at least we can see worst case scenario
At that price I think it would def be worth having (and a good present idea for those awkward folk you have run out of ideas for) .........................
#10
I really don't see the point in these unless you happen to be a right wasteful sod and leave things switched on that you don't need. Here's an idea, instead of buying one of these just turn things off when you're not using them - it's not like you would go "hey I fancy switching the oven on for a few hours just for the hell of it" LOL

Are people really that lazy that they leave things switched on all the time just in case they want to use them in an hour or so?? with newer LCD TVs they use on average 0.5W per hour on standby, so with them it's no big deal to leave it on standby really. That equates that you would have to leave it on standby for approx (very loosely) 5.5 - 6 hours per day to even add up to using 1KW/h per year (approx 10-15p on average). So unless you have loads of TVs in the house that are left on standby ALL the time, that's not going to make much difference to your wallet... it's only the bigger items that will save you money by switching them off when not in use, but like I said, who would leave those things on anyway?? apart from if you have kids obviously, but a lot of kids wouldn't care if it costs you money anyway.

Rant over!!
#11
pet2000
I don't understand the principle of energy monitors. Wouldn't it be just as easy to look at the back of your appliance for energy use and count the avarage running hours? Your electricity meter will also tell you how much total energy you use.


Then by that logic, can you please tell me how much power a PC is gonna consume?

Looking at the back of your appliance is not gonna work for everything.

What about finding out how much power something uses on standby?
You can't do that by just looking at the label.
#12
looks like a good deaL IF you can wade through the ****** posted on the thread
#13


Thanks friend is on jobseekers allowance ive ordered 1 on behalf of him for myself :thumbsup:

FREEBIEEE
#14
pet2000
I don't understand the principle of energy monitors. Wouldn't it be just as easy to look at the back of your appliance for energy use and count the avarage running hours? Your electricity meter will also tell you how much total energy you use.

BTW, make no mistake, if your bill goes down the energy companies will simply increase the price to make sure their revenue doesn't go down. We as the consumer loose out, no matter what we do.


That only gives you peak/max rated power usage, not average usage. For example a 600W plasma won't consume 600W all the time. Infact most devices won't consumer their peak rating on average.

I guess you could run out and keep checking the meter (mines outside the house) but its much easier to just look at the owl.

There are 4 adults in my household, and two of us work from home often, so I find this pretty usefull to keep tabs on power consumption.
#15
This is the same model that was given away by some of the papers and British Gas a year ago or so.
#16
pet2000
I don't understand the principle of energy monitors. Wouldn't it be just as easy to look at the back of your appliance for energy use and count the avarage running hours? Your electricity meter will also tell you how much total energy you use.

BTW, make no mistake, if your bill goes down the energy companies will simply increase the price to make sure their revenue doesn't go down. We as the consumer loose out, no matter what we do.


I totally disagree with this, there are all sorts of silly energy usage myths like TVs use as much in standby as when they are on. With this there is no "have you heard how much doing xxx wastes/saves" you can see exactly how much your house is costing you at any one time.

Devices that make heat are very expensive to run, people still don't seem to get this fact.
#17
Pity this device is inherently inaccurate because it doesn't get a sniff of the voltage waveform, only current (unlike the plug-in energy monitors) so can't take account of power factor. This will mean that it will over-read for most appliances, by an unpredictable amount.
#18
looks good thanks
#19
pibpob
Pity this device is inherently inaccurate because it doesn't get a sniff of the voltage waveform, only current (unlike the plug-in energy monitors) so can't take account of power factor. This will mean that it will over-read for most appliances, by an unpredictable amount.


very good point. i was about to go and get one now i'll think about it. lol thnx:thumbsup:
#20
For any teachers on the site, this is an excellent tool to use when studying mains electricity and cost. So hot for me, hopefully my Sainsbury's will have them. Whereabouts in the store are they?
#21
They do not have these in store or online - BOOO to Sainsburys - again
banned#22
pet2000;5847354
I don't understand the principle of energy monitors. Wouldn't it be just as easy to look at the back of your appliance for energy use and count the avarage running hours? Your electricity meter will also tell you how much total energy you use.

BTW, make no mistake, if your bill goes down the energy companies will simply increase the price to make sure their revenue doesn't go down. We as the consumer loose out, no matter what we do.

Hilarious post!

Appliance energy usage is a rough guide. Tv's for example are notoriously unreliable. A full load on a washing machine wont cost the same as a half load etc etc etc.

Also, I have to lol loud about your statement that if my bill goes down due to lower consumption, then they will raise the price for everyone! :whistling:
banned#23
paddy.stone;5849163
I really don't see the point in these unless you happen to be a right wasteful sod and leave things switched on that you don't need. Here's an idea, instead of buying one of these just turn things off when you're not using them - it's not like you would go "hey I fancy switching the oven on for a few hours just for the hell of it" LOL

Are people really that lazy that they leave things switched on all the time just in case they want to use them in an hour or so?? with newer LCD TVs they use on average 0.5W per hour on standby, so with them it's no big deal to leave it on standby really. That equates that you would have to leave it on standby for approx (very loosely) 5.5 - 6 hours per day to even add up to using 1KW/h per year (approx 10-15p on average). So unless you have loads of TVs in the house that are left on standby ALL the time, that's not going to make much difference to your wallet... it's only the bigger items that will save you money by switching them off when not in use, but like I said, who would leave those things on anyway?? apart from if you have kids obviously, but a lot of kids wouldn't care if it costs you money anyway.

Rant over!!

you are missing the main selling point for me.

I have an huge oldish chest freezer. this will help me determine the savings, if any, I can make by replacing it with an AAA rated one and how long it would take to recoup the initial outlay.
#24
I used to leave my computer base on 24/7 and recently got a plug in unit from maplin, pluged computer in to it and it was using 160 to 170 watts without moniter, also music system in standbye was using 16 watts. all these things add up and untill you start checking you don,t realise.
banned#25
steviecross;5851475
I used to leave my computer base on 24/7 and recently got a plug in unit from maplin, pluged computer in to it and it was using 160 to 170 watts without moniter, also music system in standbye was using 16 watts. all these things add up and untill you start checking you don,t realise.

same here. now it goes to sleep a lot more ;-)
#26
I find my Owl absolutely brilliant. Viewing it at various times during the day I realise I might have left an appliance on in error and so check things out - I would guess I will save the cost (I paid £30 for mine) in just over a year and then the savings will accumulate. To get it free or for low cost - that's fantastic.
#27
Does anyone know which Sainsburys store has them in stock? I have phoned all the Sainsburys in Derby none of which have even heard of the product!
#28
i got one of these similar sort of thing, u switch it on in any house and it monitors the amount of ******** the government spits out every day so far it seems to go nuts when taxes are mentioned and when u talk about carbon taxes it goes through the roof and lights up LIARS LIARS all the time, seems to work well.....
#29
mikeswrx02
very good point. i was about to go and get one now i'll think about it. lol thnx:thumbsup:


I think it depends on what you want it for. If you want something to measure the consumption of a particular device accuarately you'll need to use an inline meter.

If you want to measure the accuracy of your elctricity meter, you'll need a calibrated device and an electrician to fit it (which would probably cost more money then you'd save).

If you want a reasonably accurate device which allows you to easily see the change in consumption accross all devices in your house then the OWL (or equivelant) is what you need.

To give you an idea of accuracy, mine has been within 5% over several months.
#30
None in Newbury or Reading Calcot.
#31
Mentos;5852174
To give you an idea of accuracy, mine has been within 5% over several months.
I'd guess that most of your energy consumption is from appliances with a unity power factor, such as heaters. I have already said that the Owl is an inherently inaccurate way of measuring the energy consumption of some things, including, I'd guess, the fridge which an earlier poster was buying it for. So you cannot extrapolate your experience to others, and the earlier poster may be disappointed that the savings are not as much as they expect when they splash out on a new fridge.
banned#32
pibpob;5853428
I'd guess that most of your energy consumption is from appliances with a unity power factor, such as heaters. I have already said that the Owl is an inherently inaccurate way of measuring the energy consumption of some things, including, I'd guess, the fridge which an earlier poster was buying it for. So you cannot extrapolate your experience to others, and the earlier poster may be disappointed that the savings are not as much as they expect when they splash out on a new fridge.

yes, my mistake in thinking this was good for measuring individual appliances. its useless for that purpose so I wont be buying (not that any exist apart from the OP's sainsburys clearance shelf like most sainsburys deals on here ;-)).
#33
Besides not being able to measure power factor, the device has an even more basic flaw that it can't even measure voltage, so it makes an assumption. If your voltage isn't what it assumes, you will get an inaccurate reading for everything.

Again, the plug-in energy meters can measure voltage (and I hope they do!).
#34
csiman;5853455
yes, my mistake in thinking this was good for measuring individual appliances.
That's not really the problem - if your voltage is what it thinks it is, and the individual appliance is a heater (oven, toaster, kettle, fan heater etc) it will be pretty accurate. It's not the number of appliances that is the problem, it's the nature of how different appliances behave and that it is not making a measurement which gives it enough information to calculate energy usage without making assumptions.
banned#35
pibpob;5853484
That's not really the problem - if your voltage is what it thinks it is, and the individual appliance is a heater (oven, toaster, kettle, fan heater etc) it will be pretty accurate. It's not the number of appliances that is the problem, it's the nature of how different appliances behave and that it is not making a measurement which gives it enough information to calculate energy usage without making assumptions.

not sure what you mean. Surely the plug-in meters measure how much electricity a device has used over a given period of time?
#36
pibpob
I'd guess that most of your energy consumption is from appliances with a unity power factor, such as heaters. I have already said that the Owl is an inherently inaccurate way of measuring the energy consumption of some things, including, I'd guess, the fridge which an earlier poster was buying it for. So you cannot extrapolate your experience to others, and the earlier poster may be disappointed that the savings are not as much as they expect when they splash out on a new fridge.


Actually my heating is Gas based, not electric.

But yes, for it to be that accurate the majority of consumption must be by appliances with a PF close to what the OWL is calibrated to expect.

But ultimately I don't use it to check my actual power consumption but the delta's between the observed norms. I've learned where my household power consumption reading (on the OWL) idles in given situations, and when I observe a big difference from the norm I then know I need to check whats going on.

I have inline meters from work, so I can then check if the OWL is simply over estimating the actual consumption of something.

Ultimately you need to strike a balance between conveniance and ease of access to data and accuracy. Inline meters may give me accuracy, but thats only relevant if your going to be proactive in checking the data of multiple meters dotted around the place. Whereas the OWL can be placed anywhere and give me an instant indictaion that something may be wrong.

I agree its better to use a device which calculates actual power rather then apparent power consumption. But is there an equivelant device suitable for self install home usage?
#37
csiman
not sure what you mean. Surely the plug-in meters measure how much electricity a device has used over a given period of time?


Not all of them measure the power factor, unfortunately. A bit silly for inline devices IMO.

Without doing this they are effectively measuring apparent power rather then actual power.

I found the following page which gives a "simple" explanation:

http://www.pcguide.com/ref/power/ext/basicsPower-c.html
#38
None in Cannock Sainsburys.
#39
non in sainsburys Shrewsbury or Telford
#40
None in Sainsbury's Hazel Grove. Called in on my parents afterwards and found they had one spare sat on the sideboard - my mum had won it in a raffle, but as they already had one they hadn't touched it - result! :D

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