great little device, accurate, easy to use, but it lacks the ability to display on demand current draw. you cant see instant usage, you HAVE to leave it plugged in and moniter over time. makes it hard to diagnose power issues if you have to leave it plugged for hours or days for just a single device or circuit

muy bueno

So far this Kill-a-watt has worked well. I'm a little nervous about bout the grounding pin breaking, based on some other reviews, but I've been very careful to grab firmly by the back-half of the shell and pull straight out with no issues. I do like that it remembers usage so, if it is in a difficult place to read (like behind the fridge or under a desk), you can move it to another outlet to read it. However in almost any outlet, it can be difficult to read because the LCD is not backlit and has a narrow viewing angle. It is especially difficult to reas the tiny units unless looking straight at it. (IMO, they should improve the display and add backlighting and a button to turn on backlighting (not always on and consuming power).I'm not sure I would trust it to measure something like a space heater though - not over any extended period of time. I did check several heaters, but for only around 5 minutes each, so there was no chance of heat building up in the outlet. I did notice that all of the "1500 watt" digitally controlled thermostat heaters I tested would spike to over the measurable 1875 watts for a couple seconds when they first kicked on. It handled it fine, but I wouldn't abuse it like that regularly! It's unfortunate, because measuring usage of a heater over at least a 24 hour period is probability about the most logical item to measure next to something like a refrigerator or dehumidifier, but some of these small heaters really push the envelope, at least when first kick in and still use 1450-1500 watts for several minutes so they can quickly warm a room.

Bueno. La verdad que es útil y está bien pensando. Algo caro pero funciona muy bien.

Sólo lo compré para usarlo unas pocas veces, funciona muy bien y tiene varias opciones para medir la electricidad/consumo.

Excelente dispositivo.. medí el consumo de mi refri viejo y era de 100kw al mes!!! Lo cambie por uno inverter y ahora solo consume 60Kw, este aparato me ayudó a tomar la decisión de cambiarlo por uno más eficiente

Es un Excelente aparato ayuda a solucionar dudas de consumo de energia. Facil de usar e interpretar las funciones del equipo.

Muy bueno, aunque por desgracia (que no es culpa del aparato) el costo de la energía en México es variable, por lo que la función de cálculo de gasto, simplemente no sirve, pero da una buena idea. Me gustaría un poco más de autonomía en el aparato. Esto quiere decir, el display está encendido mientras el aparato está conectado. Cuando se desconecta, el display se apaga, así que puede ser complicado leerlo en ciertas condiciones. Ciertamente se puede conectar en algún lugar más cómodo y leer lo que decía, pero ¿por qué no ponerle una batería recargable pequeña para poderlo leer en la mano, después de que se desconecta?

Llegó con el empaque roto aunque el producto se encontraba en buen estado y sin daño físico. El aparato funciona a la perfección y es realmente muy fácil configurarlo, una compra recomendada para aquellos que quieran saber cuánto consumen sus aparatos eléctricos / electrónicos. Estaría bien que incluyeran una extensión o algo parecido porque luego los contactos están en posiciones incómodas y no se alcanza a ver la lectura.

Perfect product..

Kill A Watt es esencial para conocer el consumo eléctrico de los aparatos de la casa y de esta manera saber en que gasta la electricidad. Una de las cosas interesantes de este medidor, es que puede decirnos aproximadamente cuanto nos cuesta tener un aparato en uso por hora, día, semana, mes y año.Gracias al medidor pude encontrar que aparatos consumen energía cuando están apagados y así reducir el consumo fantasma. Con algunos cambios pude reducir 66kWh de consumo al bimestre, ahorrándome $185 pesos en el próximo recibo. (En mi caso 1kWh = $2.802)El medidor es muy fácil de utilizar, solo se conecta a la toma de electricidad y conectamos el aparato a "observar" en el contacto del medidor. Podremos ver casi inmediatamente cuantos Watts consume en tiempo real, cuanto ha consumido y cuanto tenemos que pagar por la electricidad usada desde que se prendió.Lo importante aquí es configurar el costo por kWh la primera vez que lo conectemos, de esta manera los "costos" sean lo mas cercanos a la realidad.

I purchased this meter to understand why my electric bill has become so high. I knew that I had lots of devices connected 24/7 that were each using small amounts of electric power, but didn't know whether that was my problem. Also, I have two refrigerators, but one of them is seldom opened. I didn't know if it was a major contributor to my problem. And finally, I have some devices that we use frequently which clearly consume a lot of power, like our television and home theater system, and I didn't know if watching that for several hours a day was causing a problem.The product provided answers to all my questions.What it doesThe meter plugs into a wall outlet, and then you un-plug the device you want to measure, and instead plug it into the meter. You immediately can see how much power the device is using at that moment in time. When you do this, you have to remember that some devices have a standby mode, where they are consuming some power, but are not consuming as much power as when they are being used. A good example is a TV set. It uses a little power all the time so it can read the "on command" from your remote control. Then, once turned on, the TV consumes a lot more power than in standby.So for many devices, you have to measure the standby power, and then measure the power again once the device is turned on.Almost any power meter can measure these two types of power. However what makes this particular meter so useful is that it can accumulate measurements over time, so you can figure out how much power a device will use, on average, over a cycle of many days. A good example of this is your refrigerator. You can wait until you hear it running and then plug it into the meter and read the power. I did this with the old fridge in our garage and found that it uses 248 watts while running. However, that is not a useful figure because, of course, any refrigerator cycles on and off during the course of the day. What you really need to know is how much power it uses over the course of 24, 48, or 72 hours. With the P4460 Kill A Watt EZ power meter, you can plug in an appliance, walk away, and come back in an hour, day, or week, and read the total amount of power used over that period of time. It is easy to then figure out how much power the appliance will use, on average, during the course of a month, and how much it will cost.To help you with the cost calculation, the meter lets you enter your energy cost in cents per killowatt hour (a figure you'll find on your monthly bill) and it will then tell you how much the appliance will cost per day, week, month, or year. This is pretty neat, although there is one flaw in this approach. The flaw is that PG&E (our electricity provider) has a multi-tier rate system where we pay very little for the first 90 killowatt-hours of electricity, then more for the next 30, even more for the next 60, and even more for everything after that. You'll have to come up with your own math if you want to figure out which rate to use. My solution was to use the most expensive rate because our bill always triggers the top tier (as I expect most people's bills will do if they own a home instead of an apartment). Thus, any new electricity usage will always be charged incrementally at the top rate.What it doesn't doThis meter requires that you be able to plug the device into the meter. This means that you have to be able to get at the plug and disconnect it from the wall. By contrast, you can purchase a "clamp on" power meter that only requires that you be able to access a wire that feeds the device, and you then clamp onto that wire, without disconnecting the device, and the meter reads the power by reading the induced magnetic field from the wire. This is a much more elaborate way of measuring power, and these devices cost at least ten times what the P4460 costs.The meter also cannot help you measure anything that is built in. Thus, you can't measure the power used by all the lights in your kitchen (we have a lot of track lights which are quite clearly consuming a lot of power, but I can't measure this with the P4460). The Kill A Watt also cannot measure 240V appliances like your dryer or electric oven.Summary -- Is It Useful?So, having used this meter for a few days, was it worth the cost and is it useful? The answer to both questions is a resounding YES! I was able to find out that the almost ninety devices I have connected to the wall in this house use enough standby electricity (the amount used when connected, but not turned on) to cost me almost $40 per month. Some of the whacko "green" people try to tell me that I should disconnect these devices, but that is not practical. Do I really want to turn off my Internet modem, my router, my wireless access point, my fax machine, my telephone answer machine, my portable phone, etc. and only turn them on at the instant I'm going to use them? I suppose I could, but it would make them far less useful, and would be a total pain in the neck.However, I did find several devices that used a lot more standby power than I would have thought, and which I CAN turn off. A good example is the furnace. During the summer, I don't need to have these connected (I actually have two small furnaces, instead of one large one). I had never bothered to unplug them. However, the P4460 tells me that they are using 13.2 watts of power, all day, all night, every day. I found that at my electricity rates, every 5 watts of 24/7 power costs me $1 per month. Thus, by unplugging the two furnaces I am going to be able to save about $2.25 per month for about four months of the year.So, I have identified appliances that I can disconnect, without greatly affecting my lifestyle, and by doing so, I can save money. I'll certainly pay for this gadget within the first year, just by doing this.I am NOT doing this to "save the planet," because quite frankly what I do -- and even what lots of people like me doing the same thing -- won't make a hill of beans difference (take a look at how much electricity is used to create a pound of aluminum or roll a sheet of steel ...). I am an electrical engineer, and believe me, you don't change things by operating at the margins of the problem.Instead, I'm doing this because it is going to save money on my electricity bill. The cause may not be as noble as the fiction of "saving the planet," but it is far more real and -- this is the whole point -- far more MEASURABLE!

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