GQ GMC-600 Plus Geiger Counter Radiation Detector Dosimeter Alpha Beta Gamma X-ray

This product truly does everything you’d want it to, the battery life is truly incredible, yes it’s bulky, but it can be wore on a belt and transported quite easily, the case is plenty adequate for padding and usability. If you’re looking for the best all in one pancake, I don’t think you’ll be let down, note the beta response when taking measurements, as it performs extraordinary with radium but, with any pancake, has less ability with pure alpha sources

This review is as much for GQ Electronics as it is for their GMC-600+ Geiger Counter. USPS managed to lose my package for this purchase - which was scary considering the cost but GQ was beyond incredible about the whole ordeal. They were responsive and didn't stop working with me until I had my counter in hand. I can't thank them enough!Now that I've had a few days to spend with the device I'm very impressed with not only the build quality but also the accuracy.For my own personal test I used an Am241 source from a smoke detector, since this is a measured source with an activity level of 37kBq alpha radiation. The conversion factor that I found for alpha radiation to go from cpm (what the counter displays) to Bq (atomic disintegrations per second) is (cpm x 37)/60. With this source on the GMC-600+ I measured ~55k cpm. (55000 x 37)/60 equals ~33.9 kBq which is a pretty fair approximation of 37kBq when one factors in the fact that there is a small distance between the source and the meter (around 2mm) and alpha radiation does not travel far in air. This is pretty accurate for alpha imo.Unfortunately I don't have any measured sources for other forms of radiation, I collect and hunt for radioactive minerals. I do have quite a few spicy rocks though and this meter is accurate reading those as well when I compare to other meter readings I've taken with various other meters that read alpha, beta, gamma and x-ray radiation.

Just as the title says, it's an amazing Geiger Counter for the price point. I needed a pancake tube Geiger Counter for alpha detection and this gets the job done wonderfully. It's got a wonderful UI (multiple options on how to display the text and a screen that rotates to fit current orientation), a solid amount of detection customization (including voltage adjustment and accuracy requirements), and even wifi connectivity to upload live data to a server (I don't need it specifically but it's a nice feature to have). You could of course go for something like a Gamma Scout if you need more precision and more detection features. But you'd then be paying double and likely waiting a lot longer to receive it (they were on backorder last time I checked). This however arrived 5 days after I ordered it. Overall, it's a solid detector with a lot of great features, customization, and solid quality for a very affordable price. I'm definitely going to be looking to GQ for any future detector needs.

I had a Geiger counter the 500+, and I decided to upgrade to the 600 though it might be thicker and larger slightly heavier the quality of this machine, and it’s cap capabilities is absolutely absolutely outstanding!!! Where my 500+ would only partial counts on the radiation levels on Uranium glass glass and uranium glaze along with radium, the 600+ shows everything and the numbers increased tenfold!!! It’s unreal to realize how much I was missing and not knowing the count per minute of radiation that I was receiving before I had the counter now I can store everything safely and appropriately! I happen to notice how durable this product is as well. I accidentally dropped my Geiger counter and thought it would truly break, but it held up 4 foot drop to concrete no issues.!!! Very impressive along with the battery life I’ve had this Geiger counter for months and my batteries still not to half!!! it comes with chargers and everything you need with the radiation level chart overall and an amazing product and will definitely recommend this to anybody!!!