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Plug In/Battery Operated Energy Saving Monitor With Timer

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Quoting product code: N47KB


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About this product


  • Large, easy to read LCD - makes programming simple
  • See how much power your appliances are consuming
  • Can be mains powered or battery powered

Product overview

• Large, easy to read LCD - makes programming simple
• See how much power your appliances are consuming
• Can be mains powered or battery powered
• Requires 3 x AAA batteries, (Order Code L42AL, not included) if running off battery power
• Suitable for an extension lead to be plugged into it, to monitor the consumption of multiple appliances
• Be eco-alert by monitoring CO2 consumption
• Can display the cost of electricity and power used
• Monitors volts, amps, watts, kWh, elapsed time, cost and CO2 emissions
• Displays saving in kWh, elapsed time, cost and CO2 emissions
• 96 on/off cycles per day
• 7 x 96 on/off cycles per week
• Holiday and random mode
• Manual on/off override button
• Alarm mode protects against over current, over voltage, under voltage and over temperature
• Surge protection protects your equipment from damaging electrical surges and spikes
• Surge-free on/off switch
• Rated at 15A and 3289W
• Requires 3 x AAA batteries, Order Code L42AL, not included) for the product to be battery powered
• Weight: 142g
• Dimensions (h x w x d): 130 x 64 x 38mm

By simply entering the unit cost of your electricity and plugging an appliance or extension lead into the power monitor, the LCD screen enables you to easily see the cost of the plugged in appliances. It allows you to see useful data such as: cost generated by a socket, kilowatt hours used (as found on your electricity bill), active watts consumed, apparent power, voltage from the socket, amps used. With this knowledge you can reduce your electricity bill and more importantly reduce your carbon footprint.. The built in timer is ideal for switching lights, radios, etc. on whilst your house is unoccupied, giving the impression that people are in. It can also be used to take advantage of cheaper electricity costs during off peak periods.
This handy product gives you the option of plugging in to a wall socket, or using in places where mains power is not accessible using the battery power option (requires 3 x AAA batteries, Order Code L42AL, not included). An extension lead can also be plugged into the unit, giving you the option of monitoring the power usage of multiple appliances. It also enables you to use the timer function on more than one appliance at a time when using in conjunction with an extension lead.

Rated 4 out of 5 by from This is a chunky unit but it's not just an energy monitor it is a timer as well. it does the job. It is easy enough to use but the instructions could be a little clearer. To see how much energy an appliance is using is simple, just plug it in and the wattage or kwh is displayed clearly. The screen has to display a lot of information so some of it is a little difficult to read but not impossible. I used a 1000w fire to check the accuracy and that read correctly. I've checked a laptop, a monitor, a CPU and they all gave appropriate readings. On the whole a reasonably priced and very useful piece of kit.
Date published: 2013-10-25
Rated 1 out of 5 by from I am just about to return the second one of these. The first was mechanically faulty - it had a screw missing from the case and the case was thus coming apart. The second one does not seem to measure amps and power correctly - its main purpose. Just plugged into a socket with nothing attached it reads a current of around 0.63A and a power which fluctuates between about 1W and 15W. I plugged in a 100w table lamp in case it was unhappy with no load attached - it still read the same (would have expected around 0.4A/100W). I then plugged in a 1kW heater - it seemed to read correctly - i.e. a little over 4A/1000W. It also seemed correct when I switched on the additional 1kW heater element. It seems that it only works correctly if the load exceeds the 0.6A or so - I can only assume it's faulty. You should also note that physically it's quite large - approx 7cm wide x 16cm long x 6.5cm deep (not including the pins)- it extends about 11cm forward of the earth pin. If plugged into a typical mains extension socket, you can't plug anything in adjacent to it. Given its size, the display is not very big and needs to be viewed straight on - at an angle it's difficult to read. The backlight doesn't seem to help much. Even if working correctly, I don't think I'd be very impressed.
Date published: 2012-05-10
Rated 1 out of 5 by from poor instructions I haven't a clue whether the thing works or not. I tried it twice, and I don't know whether the reading is accumulative or not - I can't work out how to reset it. Maybe you might be able to understand the instructions, but I can't, they are absolutely impenetrable. Hopeless. It got 1 star because the site won't allow me to give none.
Date published: 2014-05-19
Rated 5 out of 5 by from Great piece of kit I have had one of these for two years. Works extremely well, very,very, accurate on wattage readings. But current readings on anything using less than 2amps and the current will read more than what it really is, but as I say the power reading is very,very, accurate. Voltage reading is accurate too. I compare with 2 digital multimeters and a trusty analogue AVO 8 MK3. Ok fully agree with all other reviews, instructions are a joke, useless to put mildly. But I put batteries in and sat down in an arm chair, and worked out how to use it in 10 mins. Once you know it is very easy, and convenient. Timer is easy to set, along with initial setting of clock. But in honesty, must add, for 18 years was in TV repair trade, showing people how to use video recorders etc. and a radio ham, so have head start. Could imagine many people having problems, so feel the instructions should be IMPROVED. I am off to buy another now, as it happens.
Date published: 2014-12-28
Rated 1 out of 5 by from Great Idea(s)!!! (Pity About Execution/Quality). Can be Costly, Avoid Till Fixed!!! This looked great at the price so bought one. Have to agree with previous reviewers about bulkiness. If using on a conventional Blockboard will make adjoining sockets unusable. Fair bit of weight to it as well. best make sure the Wall socket is well screwed in. Instructions are something else. Previous mention of a MSc needed. I am a prospective Technology PhD but still had problems partly because this seems a bad Google Translate from some East Asian Language (Indonesian/ Fillipino/ Chinese?) When finally got the hang of this found that had a great no. of good ideas going behind it. Not only can you see how much energy you are using, but you can also see how much you save ! by using the timer to switch off your media peripherals whilst on standby for example. Also has Over/Under Voltage/Current and Temperature Protection built in so thought this was the Dogs biscuits!. Decided to plug it in and try it out on the Computer + Printer + Peripherals as a start. Started off Ok but immediate problem in that the LCD was defective and missing a digit on Lower Screen. Also was measuring 17W when nothing connected at all! Pretty high error but decided to go ahead anyway and computer in boot cycle with Laser Printer about to boot up when all of a sudden all Hard drives/etc start crashing with Power Switched off showing an OverVoltage of 243V !??!! (Accompanied by incessant beeping which only stops when the unit is plugged out totally) Didn't realise the damage done to computer yet but tried on all other sockets and still showing OverVoltage at 243 V!!?!! (with incessant beeping!!!! watch out for your neighbours if you are not in as is as loud as Fire Alarm!) Actually then stopped working altogether but had enough when realised had to reinstall entire operating system and my Laser Printer has never been the same since! I am posting a review here because still believe that this is a great idea if it can be properly implemented. In the present incarnation however it is best avoided. MAPLIN give this another go but test this (and instructions) properly before putting it on the shelf. (Again 1 star bcos cannot give it none!!) I am sure this is a bad un that has slipped through!!!
Date published: 2014-10-21
Rated 1 out of 5 by from unenglish manual Product very bulky. I think I will need a masters degree in physics to understand the manual. Plain English would of helped.
Date published: 2014-08-08
Rated 1 out of 5 by from Avoid- not useable I won't bother going into details about accuracy (seems OK) or the quite complex set up for the timer (it's OK once you know how) What overrides all of that is the over-voltage protection which simply cuts the power off! The manual claims that it must be operated within 230V +/- 10%, (so up to 253V) and although the readout seems to correspond with all 3 of my multimeters, it just keeps tripping on over-voltage, displaying the voltage as 245 or whatever. Seems like a firmware bug,plain and simple. IMO that makes it not fit for purpose. It shut off my 3D printer after 7 hours of printing (with 3h to go) it could be worse. I have done 36 hour prints- but definitely wouldn't risk it with this in place! So I would have given it a 5* for price and functionality, but that's nullified by the bug. I think it's too late for me to get my money back, but I will try.
Date published: 2014-12-07
Rated 3 out of 5 by from Good if you like puzzles I couldn't comment on the accuracy of the meter, but the timer seems quite useful. Be warned though that the instructions are in pidgin English and despite having flow charts are totally impenetrable. Be prepared to have to figure it out by trial and error!
Date published: 2015-01-22
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