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

I bought this as a verification for finding authentic uranium glass and it works like a charm! I love that it's rechargeable but I can also easily replace the rechargeable battery. It's a good size for taking with me when trying to find UV glass as it's about the size of a cell phone and fits in my pocket easily. The screen is clear, it's audible but not too loud, it has lots of options (especially love the dark mode!) and only takes a minute to read the cpm of any given glas piece! Super easy to use. Highly recommend as an affordable option for us uranium hunters!

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.

This is a fantastic Geiger counter for the cost. It appears to be way more sensitive (by distance from a known radioactive source -see photos) than I would have expected from the price point -especially if you get it while on-sale. The battery life is fantastic, lasting several days on a single charge. The graphics are easy to follow but unfortunately are predefined, not allowing the user to customize the appearance of the graph apart from the time points. The “click” sound is accurate, and reflects each radiation count without maxing-out into a continuous beep. The color-coded danger bar is a nice touch that changes based on current detection levels. When in the “green” zone, the light at the top of the unit blinks green with each count. When in the Yellow zone, it alarms (if you have it set to do so at that level, which is adjustable and user defined) and the light blinks yellow. When in the red zone the unit vibrates, beeps loudly, and the light blinks red. The unit can measure the expected units “CPM, uSv/h, mR/h, and CPS”. I’ve included photos showing the awesome sensitivity of this unit at progressively closer distances to a Geiger Test Card (known radiation source). The first photo shows background levels (which fluctuates up and down, naturally). The next photo shows a distance of 30 inches from the test source -it picks up the card at the distance, which had be incredibly impressed. Next I show the unit at 20 inches, 10”, 5”, and 1” where I hold the card up to show it’s presence. The next two photos show the Geiger Counter directly placed on top of the test card, as the bare-unit and then while in the case (which drops the detection count significantly, unfortunately). The last photo shows my radiation source.I am beyond impressed. The test card has a maximum detection lever reported as being between 1000-4000 CPM, and this unit captured an impressive 3200 CPM. I highly recommend this product. It is from Seattle, WA which was also a selling point for me -being a home grown company. Enjoy!

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.

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.