GQ GMC-300S Digital Nuclear Radiation Detector Monitor Meter Geiger Counter Radiation Dosimeter

Exactly as described and well worth the price. I've tested this against some known elements in my collection and the counter works well. The interface is intuitive and easy to navigate to change various settings and customize the display. I chose this as an economical option that would still allow me to have audible and visual queues. The ability to view the data (including as a graph) and export it is appreciated, as is having a quick tool for the standard conversions and equivalent metrics of Sieverts, Rads, CPM and dose etc. Would also note the battery came charged and has held up well for hours now. I look forward to taking this on my upcoming trips to the odd mineral shop or planned conventions. Don't look at other cheaper options on Amazon from xyz brands and vendors... This product has the quality you are really looking for.

Works great. Found out I have been eating off of radioactive dishware. Very helpful product.

I wanted a Geiger counter to measure my radiation levels after my PET scan. Sure enough this thing really worked! Stupid easy to use. Just hold down the power button. It’s the one furthest to the right, and it turns on and starts working right away. You can cycle measurement method by pressing the arrow buttons. It can measure in counts per minute (CPM), microsieverts per hour (μSv/h), or milliRoentgen per hour (mR/h). I tested it after my PET Scan and sure enough, I was radioactive!

I'm only giving this 4 stars because I know literally next to nothing about Geiger counters. This one is supposedly a real tube. It works for what I needed, just sampling some uraninite that I bought. Seems to do what it's supposed to. Shipping was fast and easy. What else can I say? You that know better could probably give a much better review. The rock I got from Colorado tests extremely hot, is that accurate, I have no idea.

Brand new in factory packing, battery furnished and installed. Rechargeable Battery at 90%. USB Charging cord furnished. This unit measures total Beta & Gamma emissions as CPM, mR/h, and msg/h. Easy on/off. Long battery life, 14500 Li-ion battery, charges installed in unit. Reasonable price. Reviews show the unit to be well constructed and dependable. Nicely portable. Bought a carrier, but it has no belt loop and a bit too thick to fit in a pocket. The actual unit will fit in a shirt pocket. Noise level is distinct but not loud enough to disturb others, at least when counting background. Overall, I am very satisfied. Only use will determine durability. Geiger tubes are fragile so take care not to drop this unit.

It works! I don’t know if it’s the most accurate or best quality, but it works for the purpose I bought it for. It was reasonably priced, and it’s easy to use. I bought it so I could place it next to my cat when she had radioactive iodine treatment for her hyperthyroidism. I just wanted it for the gag, so I purchased one that wasn’t too pricey. It has come in handy to measure the radioactivity in her waste though! I can’t toss her waste until October, so I’ve been checking the poop collection bucket to see how much it has gone down in radioactivity. I’m pleased with my purchase!

I suggest any item this company sells. I really like the GQ GMC-300S i bought. I did notice its like 1/2 the price now from when i bought it. lol so buy it up. But i have had it a year ish and have used it many times and i have left it on to mess with people too. The old fashioned clicking sound. Normal background will move a notch or two and when it does it is a click like a old school Geiger counter. People will often be like what is that noise but my point is, i still have not had to charge the battery. I just did for the 1st time but it was no where near low. I have left it on many times too and it shuts off but not for a while. Its a bit old fashioned looking but it is also a high quality tool and i really like the nostalgic look. Does not functions like a nostalgic counter but like a nice modern one!! 5 star product at a affordable price.

I got this to monitor the radiation during and after my RAI therapy. For the most part, it seems accurate. The first 24 hrs of my RAI, the radiation from my neck area was off the charts. It was interesting to see but also scary. I used it as a way to determine the distance to keep myself far enough during isolation. As the radiation decays, the distance you radiate becomes less too. I also used it to monitor the radiation from my pillow. I have a favorite pillow and the neck area was still high in radiation. It took about a month and a half for the radiation to come back down to normal levels. Even the pillow cover was still high in radiation too. Having this tool really helped ease my worries about radiation and affecting those around me. It was well worth it. Hopefully I don't have to go thru that again. For those that do go thru something like RAI, this tool is helpful and I wish you a speedy recovery.

Fonctionne bien mieux que les produits chinois ! Très satisfait

The GQ GMC-300S Digital Nuclear Radiation Detector Monitor Meter Geiger Counter has proven to be an invaluable tool in my watch servicing hobby. I use it specifically for checking if watch dials contain radium, and it performs this task with remarkable accuracy. The digital display is easy to read, and the device is user-friendly, making it simple to operate even for those new to radiation detection. Its sensitivity and reliability provide peace of mind when working with vintage watches. This Geiger counter is a must-have for anyone needing precise radium detection at a great value.

Works. Interesting how radioactive different bits of land are.

Das Gerät macht genau, was es soll und ist sehr einfach zu bedienen. Zusätzlich hat es eine Vielzahl an Einstellungsmöglichkeiten, um z.B. Energie zu sparen. Hochwertig und stabil.

Funciona correctamente