Nuclear Radiation Detector GQ GMC-800 Geiger Counter USA Design Product US National Standard Large Color LCD Display 5 Alarm Types Dosimeter Data Save & Global Share Beta Gamma X-ray Portable Device

The media could not be loaded. Although the item is lightweight, the materials that were chosen seem to be sturdy enough to survive the everyday handling that it undergoes. Even when the levels of illumination are low, the huge color LCD display is bright and simple to see. When I utilized this device in a low-light condition, I must say that the screen functioned quite well, providing me with clear readings without causing my eyes to strain. You can easily move between the various alarms and settings because of the menu's user-friendly interface, which has navigation buttons that react quickly. I discovered that its measurements were very accurate, with only tiny discrepancies, when compared to the readings of other professional equipment that I have in my laboratory. When I am monitoring ambient levels or testing particular things for contamination, it is comforting to know that it has the capability to deliver dependable results. Depending on the location in which I am working, the five various forms of alarms—sound, vibration, light, data recording, and email notification—provide me with a variety of alternatives to tailor the manner in which I get alerts. This is really helpful.

The GMC-800 is a full featured, inexpensive radiation detector. We appreciated the clarity of the multiple display modes, as well as the use of color to indicate level. It is attractively designed, and large enough to be securely held in the hand. The design permits stable placement, with the location of the Geiger tube clearly indicated. Setup is fairly easy, with considerable user customization. You will probably want to turn off the alarm, as it is incredibly loud; or at least turn down the system sound levels. Charging creates quite a colorful display on the screen. Accuracy compared to our much more expensive and accurate unit is reasonable, although the readings are slightly on the low side. All and all, the unit is fun to use and functions amazingly well for the price, which was less than $100. Highly recommended!

This is a great product. Easy to use and understand. Lightweight and handy carrying case. Multiple ways to read radation levels. Keeps a log of units perday. Rechargeable internal battery with a USB-C cable. I ordered this because I live close to a nuclear power plant and wanted to monitor levels. I also do a lot of hiking in Southern Utah and this is another tool when encountering old uranium mines. Definitely worth the money and best of all it's made in America.

Works great. Comes fully charged. Measures Beta, Gamma and X rays. Pocket sized, nice price, a good tool to keep on hand. For the pro? No. For a keen hobbyist and at times concerned citizen? Sure. Would recommend.

Luckily I have not had to use this yet, but it does appear to work as it should. Well built and easy to use. No long learning curve - just turn it on and it does all the measuring for you. Screen is clear, bright, and a good size. Portable and not too big.

I bought this after my cat was treated with radioactive iodine for a thyroid tumor. The cat had to stay at the vet clinic for 3 days before her radioactivity level was low enough to come home but even then she had to be kept isolated for 2 weeks without me spending more than 10 minutes a couple of times a day within 6 feet of her. I also had to put her litter waste into a bucket for disposal for those 2 weeks.This device came in really handy as it allowed me to see exactly what radiation level the cat was giving off and see how it dropped off the farther away from her I got. This allowed me to feel more comfortable spending more time in the room with her during the second week. It was surprising to see how much the radioactivity level climbed when I put the device right next to her neck/thyroid area vs further down her body or when she was even a few inches away from the device. This also provided a way to check the radioactivity level of the waste buckets before putting them in the trash. The one from the first week was kept isolated for an additional week to allow more time for the radiation level to reduce before disposing of it. It was good to check the area of the room the cat likes to sleep in and see that there was no residual level of radiation showing when the cat was finally let out of the room. I was still reading some lower levels of radiation from the cat when I put the device right by her neck/thyroid area.I liked the ability to switch between the different measurement units on this device and the ability to silence the noise level while still seeing a clear LED display of green/yellow/red blink at the top as it detected radiation levels. The specific measurements were easy to read on the screen. I used this device for 20 to 90 minutes a day for the first couple of weeks of owning it and the battery level is still over 80% on the original charge.

It's a relatively low cost device, it feels lightweight and plastic-y but that is to be expected. It seems to work well, I held it up to some uranium marbles for a few minutes and picked up their radiation just fine. When put back into their lead casket the readings dropped to background radiation levels as expected.Battery life is really good, lasts a solid 2-3 days for me on a single charge when in dark mode with a 30s timer that turns the display off. Charges fully, if not 80%+ in less than an hour.Dropped it a few times while carrying it in a shirt pocket, took the falls very well.I plan to keep it on me 24/7 because I've had a few suspicious illnesses and have a higher risk of cancer than most, more than willing to pay a few hundred dollars as opposed to tens or hundreds of thousands.

Compact and easy to use right out of the box. It came fully charged and worked right away with both audible and vibration alerts. It is plenty loud if you want it to be, but the volume can be adjusted and even muted entirely. Easy to read display. Includes a clear front carrying case that can be worn on a belt for continuous tracking. Recommended.