Professional geiger Counter Nuclear Radiation Detector Personal dosimeters Marble Detector Nuclear Radiation Meter Beta Gamma X ray Data Marble Tester ore Gamma Rays Uranium Monitor

I use this check to see if a watch or clock face is radium or tritium powered. Tritium is a weak Beta ray emitter that will not penetrate glass while radium ( used for luminous dials from the 1910's to late 1960's) is a fairly strong Gamma ray emitter. If you get a reading from a watch with the crystal on it is likely Radium. Many older Rolex models ( bubble backs, early subs and GMTs) used Radium. Radium, if breathed or ingested is a danger so it is wise to have this product if you collect or work on older watches or clocks. Product seems to work well and is calibrated correctly to ambient radiation levels. The one radium dialed watch that I own ( legacy from my grandfather - keep it in the basement in a barium lined bag that was used previously to protect film from TSA x-ray machines ) correctly registered at 70 m/rem, which is the lower level of late 40's -50's watches. Also interesting to demonstrate the inherent radioactivity of rocks and wood. Not for outdoor use. Included instructions were in translated English. Good for classroom use.

I use it to detect leaks and intensity in x-ray detection machines for food production lines, it performs very well and the readings that it marks are the same as those marked by a certified geiger counter (with a value above 800usd), so for adjustments of this type of detector machines, is a good product despite its appearance of cheap plastic.I'll make updates to see how it behaves over time, for now I've only used it a couple of months and not very intensively.

I have both. The Ukraine one is a little more accurate. But this one is accurate enough (within 20%), which should tell you "beware" or "all good."Here are the advantages of this one over that other popular one:--Works quicker. Starts showing a reading in 5 to 10 seconds. The yellow one can take 30 sec to a couple minutes.--More sturdy construction. (Though don't drop it, all counters have a glass tube inside.)--Backlit screen. Can see in any light, and from wider angles, and from a dozen feet away.--You can leave it on, it doesn't shut off on its own.--You can change the threshold. (I love that.)--Clicks and alarm are quieter.--Simpler interface. None of that "1 button for 4 functions" bad design.--Detects x-rays along with gamma and beta. The yellow one detects gamma and beta, but not x-rays.--You can mute clicking, so fun for undercover, checking books in the library or whatever. lol.--You don't have to take off the back cover thing to read beta rays.The yellow one comes with batteries, for this one you'll need to buy batteries.Oh, the splash window when you turn it on has a pic of a man labeled Ernest Rutherford (father of nuclear physics.) But it's actually a picture of Rutherford B. Hayes. Oh well. It's made in China and they probably just Googled "Rutherford."That's the only drawback, and it's a tiny one. Also you cannot skip the start screen, have to start the middle arrow key every time to start taking a reading. Still, tiny issue compared to all the pluses.

I thought it odd that I was getting no appreciable readings over materials known to give off nominal radiation, so... I took my new Meter to a colleague; who had 4 grams of Uranium 238 on-hand: NOTHING. Neither the U-238 (which is highly radioactive) — nor Tritium, nor the fused glass he had from Trinity (the 1st nuclear text-explosion), nor the Americium from a smoke detector, nor the element from a Coleman® lantern — ALL of which sent his Geiger (GM) Counter off the map — would barely even register on the Meter I purchased. When I finish this paragraph, I'm contacting Amazon Customer Service to return it.

Display functions are very good, setting s easy to do, square case is great for doing long term background radiation measurements. Stand it up and let it run for hours to get environmental measurement in small indoor areas.Disappointed that batteries don't seem to last very long, but perhaps I expect too much on this issue. Case and glass GM tube are seemingly dainty, so be careful not to drop it or let it get hit by hard objects. Keep it dry, not for damp conditions, store in ziplock bag with dessicant to preserve it long term. I am impressed with this Chinese GM meter.thnak You Waysear.

It is perfect if your expectations match what it is, which is a under $100 Geiger Counter. Generally decent ones start at 3x that and go WAY up from there. It has a decent sized tube for such a cheap meter, and it has a wonderful screen. Unfortunately that screen shows nearly nothing. It gives you Sieverts and that's it. No Alpha particles are going to make it into its tube, but its Beta and Gamma detection really seems not-bad for such cheap electronics. Which are in basically just a plastic box with a fancy screen. The buttons give you nearly no options. Turn the alarm on or off, restart its averaging, turn it off or on.But . . . its great to have such a cheap counter - I can carry it all over, not too worried about it. It has a nice easy to read screen, you can't adjust the volume but the click isn't loud enough to be rude in public. If it alerts at something interesting I can pull out a more sensitive meter.I'm glad I bought it.

As described and works fine.

I got this because I needed a cheap tool to test some samples in a historic collection I was sorting. This does what it is supposed to do. It's a good, basic unit, and will do until I can convince the powers that be to spring for a really good Geiger counter!