It works as a dosimeter.
933627
Inexpensive and actually works. It is a dosimeter and does not provide instant readings. If you want to determine if an object is radioactive you must leave it near the object for about a minute. My radium dial clock showed 10 times the background reading at 1 inch away. Could not find instructions in English but operations is intuitive. Well worth the price if it is kept low.
247244
Because it's the only one I've ever had!  Other than a toy I remember as a kid, where you looked into a black space and watched for little pings of light.  But this one's easy to use, it seems accurate relative to radiation levels that my research tells me to expect, it's well made, and it works great.
3818696
A good multimeter. It works perfectly fine as a multimeter itself. I bought it just for household usage, such as checking batteries, electric wires, outlets, and so forth, and it is fuctioning for that purpose. I don't expect more than that from this cheap one. If your expectation is about those ranges, get this one. I researched multimeters a little bit and it was the cheapest I found in July 2008, only when delivery is free.
3535721
I got it because the dial of my oven is worn and doesn't show temperatures, but I've used it to check the temperature in all the fridges and freezers in my lab, my own temperature, the temperature outside, the temperature of my hot water in my faucet that is hot enough to scald, basically I can't stop playing with it.
3105105
This was an experiment to meter feed to small livestock so I am not their hostage. In conjunction with a rechargeable battery and solar charger, it works like a charm.

The manual (a laminated 1/2 sheet) could be more clear as to the steps.  But so is the case with most manuals....
2505486
I don't know really how to measure its usefulness other than my wife saying "it's working great!" I guess that means it does the job.
1905962
Its a temp gun, and it works. The display is easy to read. It would be great if you could control the emissivity on this model, but truthfully, its accurate for most surfaces.
3269304
This is a clever little timer.  Though intended for industrial automation, it also has many low-volt uses in the home.  I am using mine to prevent prolonged rings on a doorbell.  The "supply" terminals are really just another input and should be triggered as shown in the charts (which are included in the packaging and available online).  In "B" mode, the relay closes and resets as quickly as I can press the bell.  Though the device has a lower limit of 20 VAC, it seems to work fine on a 16 VAC transformer.  (I'm staying safe, though, and powering it with 24 VAC via a multi-tap transformer, only using the 16 VAC to power the bell.)  Because this is a DIN rail device, do not expect any protection from the installed environment whatsoever.  Even the orange plastic looks like it could degrade if left exposed to sunlight.  This poses a problem to the home user whom simply wants to screw the thing to the wall.  As an electrician, I look for ratings on everything.  To simply screw a rail to a beam and mount the thing to it doesn't seem quite right.  I purchased the Altech 542-504 enclosure.  Overkill, maybe.  But, at least it looks proper and somewhat protected from water and physical damage.  There are cheaper enclosures without the access door, of course.
1701469
I used it one time was very good working , also it contains led light to show you the remaining energy , It is properly working, wit a nice sleeve to protect the device .
1676155
It does what it is meant to do, measure the food. However, it is difficult to see the exact measurement.
1354315
Works pretty well. I use mine primarily for monitoring a solar charger and the range of measurable voltages is limited on the low end due to the need for the device to power itself. I honestly would have preferred that there be a way to provide external power to the meter seperate from the USB port being measured. The screen and numbers are also quite small, though admittedly quite clear in most cases (save perhaps bright sunlight.) overall, worth the cost and fun to play around with.
4733857
After a few false starts it turns out to be a useful device. I'm using it on an RC plane, not a rocket. If attached it to the plane with Velcro but it would not take a reading. I thought it was broken but it worked when I put it in a plastic bottle and ran cold water over it to simulate a higher a altitude. I eventually placed it in a film can that I'd cut vent holes in and rubber banded that to the plane. Perfect results! Also, remember to remove the batter when not in use, it will drain after only a few days.
3981153
Don't expect the world,, but HEY! It does its job.
1704774
The amount of solder is deceiving, there is not as much as  you would think. But solder is solder and it works.
4847066
The meter works as described and it meets my needs. The case is durable but the meter and detector are loose inside with a only a flat piece of foam on the top and bottom with no recesses to keep the two meter parts in place, however I am satisfied that it will protect the meter enough for my needs. The instruction manual is poorly written and seems to me written for a different meter (the battery replacement instructions are incorrect and do not apply to this meter), however the information is sufficient to use the meter and it didn't take long to figure out how to access the battery. Having said that, the meter works (the peak setting works - one reviewer indicated his didn't) and is simple enough to become intuitive after a few minutes practice. It is exactly what I was looking for and I am very satisfied with it's performance.
3848325
It does what it is supposed to do, and at a good price.
3622190
It works nicely to weight food.  The entire thing is plastic, but seems to be reasonably accurate - so no complaints.  The top container is easy to clean after each use and the rest can simply be wiped down with a damp dish rag.