New GQ GMC-320 Plus Geiger Counter Nuclear Radiation Detector Data Recorder Beta Gamma x-Ray Test Equipment

I purchased this Geiger counter after being dissatisfied with the prior Chinese model. I had acquired to test vintage watch dials / hands for radium. Safety is a upmost concern to me, and I came across this unit on the recommendation of a professional watchmaker. I did side-by-side testing, and I’m happy to say that this unit delivers excellent functionality, and I know this will help keep me safe while working on vintage watches. Highly recommend recommended - compact unit, accurate measurements, clear instructions, excellent battery life (rechargeable), and great value for the price. It’s also nice that it is USA made!!

Works as advertised

This is a very nice Geiger counter. Small and easy to carry, works very well and is quite accurate. I'm very pleased!

I ordered this after doing some internet research over a few weeks, checking for used and new units on the usual places. A big selling point is that the maker/seller GC GMC Electronics has good customer support. In my case, I plugged it in for charging and then started making the setup selections (backlight time out etc). While still plugged in to USB charging, I noticed the radiation readings were 0.000 Even after a factory reset (doesn't ruin unit calibration, don't worry) it was still zero. I was ready to return the unit to the seller, when I thought I'd disconnect from USB and try using a bit more. Either it was the USb connection, or maybe that the unit isn't 'ON' for testing when you're in setup mode. In any case, it works fine. Hope I never need it now, except to measure Brazil Nuts and Fiestaware shards! A minor issue, the wrist strap broke immediately. I guess that's better than breaking when I'm using the unit and relying on the strap. I'll probably open the unit and put a stronger wrist strap in eventually and plan on getting a case of some kind.These units use a glass (or maybe two glass) tubes; they are fragile - treat them very lightly! Good little device, great seller.

It is accurate and it's portability is great. It works as intended.

it actually works. I live near HANFORD nuclear reservation and when I drove by it actually started to get higher readings. Safe but high

This Geiger counter works great and is easy to use. The clicks sound great too. The interface is easy to use, and you can turn the clicks and alarm on and off, have it display as a graph or not, and switch between units. It also arrived fully charged, and after a few weeks the charge indicator is still showing as full.I've always wanted a Geiger counter, but I finally bought this one to test my cat after a radioactive iodine treatment. We brought our cat home as early as possible, and it was both fun an enlightening to watch as our cat easily hit 5000 count at first (and hearing the clicks race), and is now reading at a much lower 50. As radiation can't be detected with normal human senses, it would have been all to easy to forget and let our cat back on our laps too early. As it was, we ended up holding off on normal interactions with our cat for longer than the minimum recommendation.It's also fun to show off. Would buy again.

The media could not be loaded. The GQ GMC-320 Plus is an excellent tool for checking radiation levels. It’s easy to use, accurate, and lightweight. The real-time monitoring is very handy, and I love that it makes a clicking sound for radiation detection.The rechargeable battery lasts a long time, and the data logging feature lets me track and analyze readings on my computer. The only minor issue is that the screen can be hard to read in bright sunlight.Overall, it’s a great value and perfect for anyone wanting to monitor radiation. Highly recommended!