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

It seems to work well and it's a very instructive piece of equipment. Although the cards don't give a lot of information, it's a great way to learn the different ways of measuring radiation and exposure.

Hopefully I will never NEED this product. However, for $80 it is worth having even if it mainly just gathers dust. I was interested to see if there were any radon accumulations in our crawlspace. That can happen in the general area. I also wanted to do a general survey of the house to make sure that there wasn't anything weird going on. We do have some antique leaded glass. Sometimes that leaded glass wasn't strictly leaded. The product is feature rich. It can show instant exposure rates plus accumulated dosage. Lots of pretty graphs :)

I tested several items and found that the radium dial on my 1950's Timex watch to be very radioactive.

Count rate readings are 25-30% below those on a professional, scientific device (tested against two) so this is not something you can use for dosimetry, but if you just want to find out whether your shrimp or other food or a package or visitor is contaminated with radiation, this device will answer the question and give you an approximation of the magnitude.

I have been looking at Geiger counters for years, but haven't been able to justify the expense (until now). Basically, I wanted it because while I don't personally work with radioactive materials or radiation, I do work with people who do, and contamination does happen. So basically I was looking for something for everyday carry. I was also interested in confirming that granite and quartz counter tops, as well as tiles, were not radioactive. I also know a lot of people with antique china (some of which is radioactive). Okay, I mostly wanted it as a gadget, but okay, I also wanted it as a prep (eyes rolling). No seriously, if you ever actually need a Geiger counter as a prep, it might be too late to buy one. So I have a few basic preps, and now this is one of them. People often wear those little radiation dosimeter badges. I have often thought this was a bit weird, because basically they tell you that you were exposed a couple of weeks ago. Whoops - it would have been nice to have known that when the exposure was happening, so you could have stopped it. So I have been looking at a number of Geiger counters for a while, and the thing that pushed me over the edge, is that the cat was about to have I-131 treatment for hyperthyroidism (this is where the patient, in this case our cat, is injected with radioactive iodine to treat hyperthyroidism). The patient (again in this case our cat) ends up fairly radioactive for a few weeks. My biggest problem upon receiving the device is that I had no way to test it. I could find literally nothing in the house that was radioactive (thank goodness). None of the china was radioactive, none of the tiles and countertops are radioactive, and I couldn't find a single old watch or clock (i.e. with radioactive glow in the dark hands). When the cat's treatment started, this problem was solved. The cat was hot, the cat's thyroid was even hotter. The litter box was hot. The cat's vomit (sometimes invisible, except to the naked foot) was hot, and the cat unfortunately in one instance missed the litter box, so then that spot of carpet was hot. I really like the device. It has a very nice display and menu options. The battery life is great: I haven't checked, but I think it lasts more than 24 hours with the display continuously on. I like that it has a rechargeable battery that you can replace, and I like that you can recharge the battery via USB-C (i.e. while the device is running). I like that it has an alarm, so if the cat sneaks up on me, I know right away. The device is very light, so I can put it in my bag and forget that it is even there. Based on what I know, GQ is quite a reputable company in the affordable Geiger counter space. The plastic looks a bit brittle, but in practice I have (unfortunately) whacked it and dropped it a couple of times, without incident (thank goodness). There are still a few Geiger counter features that I would like (again, mostly thinking of this like a gadget): - A large and sensitive paddle tube - A mica window to detect alpha particles - A gamma spectrometer I also really like the idea of ultra compact Geiger counters (like keychain ones) for everyday carry, but in practice there is a tradeoff between size and sensitivity. One thing that would be really nice for everyday carry is bluetooth connectivity. It occurs to me that one of the most likely reasons to be exposed to radiation, is if someone you know is having some sort of medical treatment and hasn't told you. It would be super embarrassing if you were in a conference room, and your Geiger counter were to go off, because surprise, your boss's boss is having brachytherapy for prostate cancer. Awkward. So for everyday carry like this, it would be better if the device were just to inconspicuously show a notification on your phone. So I don't know if this will be my last Geiger counter, but this is the one that finally bought, after years of wanting one. All in all, I would say that the perfect Geiger counter is the one that you actually own, and that you are carrying when you are exposed. This is the one that pushed me over the edge, and so for me, right now, I would say this is the perfect Geiger counter.

I am very happy with the GQ Electronics Nuclear Radiation Detector/Geiger Counter model GQ GMC-800 USA. You never know what can be radioactive, including food. I worked on nuclear matters for the military and Department of Defense, and this would have been handy. It is very portable and has many features and settings to measure nuclear Beta and Gamma radiation, using different national/international measurements such as CPM, uSv/h, mR/h and CPS. It comes with a handy Nuclear Radiation Geiger Counter Safety Guide to alert you to normal, medium and dangerous to extremely dangerous levels of radiation for all radiation measurement types. Some electronics have radioactive parts, as well as soil that has natural and manmade radiation levels, as well as food and water. I saw a test of a very expensive 1950s Rolex watch that used radium to show the time in the dark. It registered very high levels of radiation using this detector that could be dangerous to the user. We did not know all the dangers of radiation back in the 40s and 50s. I hope they are not using radium today, but check your watches just in case. Recommend for use.

Cool gadget to have around to learn about natural radiation and impress your friends. I'm sure it could be a life saver if all H3II breaks loose and something really bad happens, but hopefully I'll never have to put that to the test. It feels well made and is easy enough to use without having any experience. If it makes a lot of noise, then stop being where you are and go somewhere that doesn't make it sq*uawk:-). It's small and portable, you can keep it in your kitchen drawer or glove box. I can't say how accurate it is as I don't have a nuclear reactor to compare it to, but it does register different levels near different things, so I think it's working. For home use, I'm guessing perfect accuracy is less important than an on/off get out of this area alert should something big happen.

This is a pretty amazing little Geiger counter. It’s got the “clicking” sound, battery lasts forever. Really happy with the purchase.

Di facile utilizzo, il menù è molto semplice non servono le istruzioni. Funzionamento molto stabile non oscillano i valori , naturalmente bisogna appoggiare e lasciarlo fermo. Illuminazione di vari colori, fantastica, suono molto bello con volume. Grafici e interfacciabile con pc. Batteria ricaricabile. È piccolo e molto leggero, unica accortezza non farlo cadere! Ad essere pignoli avrei messo un laccetto di sicurezza, che in qualche modo metterò.

Very good Geiger Counter for the price, measures background radiation reliably up to about 10mSv when measuring check sources. Unlike some of the other cheaper metres available this one has the classic "clicks" that can be turned on or off as it measures radioactivity.

Ta bueno

Simplemente genial. Es un gran contador Geiger Muller. Tecnología USA perfecta. La batería dura muchísimo. Muy buena calidad. Mediciones bien calibradas. Mide por conteo por segundos y por conteo por minutos. Mide tanto en microsievert/ como en milirem/h. Tiene dosímetro. Tiene varias formas de alama. Alrma programable. Es muy fiable y mide correcto en relación con mis otros Geigers. Viene con funda protectora. Se puede actualizar su firmware. Una compra muy recomendable. Lo recomiendo.

Fonctionne super bien. Facile d'utilisation. Explications claires. Bon rapport qualité-prix. Je recommande.