Geiger Counter Nuclear Radiation Detector - FNIRSI Radiation Dosimeter with LCD Display, Portable Handheld Beta Gamma X-ray Rechargeable Radiation Monitor Meter, 5 Dosage Units Switched

This is a high quality geiger counter considering the price. It can detect gamma, beta and x-radiation. Two screens are provided: the first is numerical and the second is graphical. Multiple units of measure are selectable from the setup screen. The manufacturing quality of this instrument is evident at first glance. It is beautifully packaged in order to protect the Geiger-Mueller tube in shipping which is otherwise subject to shock breakage. I purchased this item in order to monitor radioactivity in two places in my home. The first is an activated charcoal filter that I have on my water supply in the basement while the second is a reverse osmosis system with charcoal filters under the kitchen sink. Since there is radon in my well water supply, I prefer to remove as much as possible before it is delivered to the faucets in the house. It also serves to reduce the radon levels in air due to cooking, washing, showering and laundry. Capturing the radon in activated charcoal will also capture radon decay products (daughter products). Some of these have very short lifetimes, but some are extremely long and tend to build up in the activated charcoal filters over time. I wanted to see how these radiation levels increased over time in order to determine the optimal time to change the filters. The first thing that I noticed was that in just one week, after a basement filter change, the radiation had already built up by a significant amount. The radon in our water is approximately 3000 pCi/L. If allowed to vaporize due to cooking, washing, bathing and laundering, this amount of radiation could add about 0.3 pCi/cubic meter to the air. The radiation level that was measured close to the tank was 1.4 uSv/hr according to the meter. If multiplied by the number of hours in a year, 8760, we arrive at the accumulated dose per year which is 12.3 mSv. This is the amount of radiation exposure that would be possible were a person to stay in proximity to the tank for an entire year. This exceeds the NRC guidelines of 1 mSv per year. Clearly, the filter should not be placed anywhere near where people or children would normally gather or play, for example, a finished basement. I will be monitoring the activated charcoal filter tank for several weeks to see if the radiation buildup reaches equilibrium as the filter capacity is exhausted. This will provide a guideline for how often the filter should be replaced. Short term exposure to the filter during a filter change should not be an issue provided that safe handling practices are followed.

Works. As soon as I turned it on it started measuring background radiation in the 0.02 to 0.11 uSv/h. But I couldn’t really tell if it was working or not or just measuring some kind of noise.So I drove to work and back home and walked around at work but nothing triggered a higher reading.So I took it to a lab where they have Cobalt 60 readily available for radiation testing and just walking into the outside room behind the multiple feet of lead and concrete my meter went from 0.01 to 1.0uSV/h in just a few seconds. The little red light at the top wasn’t flashing anymore, it was solid red. So I knew that meant it was measuring the radiation and it was tripping an alarm to let me know I was way over the 1uSv/h alarm limit.That was good enough for me.On another note, the menu system is a little kludgy and you cannot save a screenshot or any history which is kinda disappointing, but for a quick measurement for on the spot radiation testing, I would say it does what it promises. I. Just wish it would connect to my phone through Bluetooth so I can download the data to save for later.

I don't know how accurate it is, but my daughter loves to walk around with it getting readings from everything in the neighborhood. I wouldn't trust it to tell me if I was entering a radioactive zone.. .

Teriffic gieger counter. Just plain love it. The only problem is that it doesn't make the classic gieger counter clicking noise. so if you want to have a clicking counter than this is not the counter for you. but there is a way to add the sound effects. you can find out how on YouTube. But now onto how good it is. It is very much worth the money. the size of it it very nice and portable. It's use is nice and easy. thanks for reading this review

This device is an absolute disaster and a scam. IT FAKES READINGS. When I decided to invest in a geiger counter for my personal safety and peace of mind, little did I know that my hard-earned money would be wasted on an absolute disaster of a device. The geiger counter I purchased, touted as a reliable tool for detecting radiation, turned out to be a nightmare in every possible aspect.The most important thing by far however are the fake numbers this geiger counter shamelessly produces. It's as if the device has a mind of its own, conjuring up figures that have no basis in reality. When placed next to a United Nuclear test card, it would completely make up fake numbers. Not only that, the CPM would always only change by weird, fixed pattern. This leads me to believe that they are making up numbers. This is absolutely unacceptable for a radiation detector that touts itself as a health tool.The geiger counter's battery life is nothing short of abysmal. It's as if the manufacturers took pleasure in designing a device that drains batteries faster than a leaky faucet wastes water. Within a very short period of time, the FNIRSIR began to lose charge quickly. In under a couple hours, it was fully dead with the device being very hot. This is absolutely unacceptable for a device that’s supposed to keep someone safe.But the cherry on top of this disastrous cake is the fact that the UI exacerbates the device's already apparent accuracy issues. The tiny, barely legible screen displays readings in a font size that requires a magnifying glass to discern. And when the readings themselves are as unreliable as a coin toss, struggling to decipher them due to poor UI design becomes an added insult to injury.In conclusion, the geiger counter I purchased has turned out to be a monumental disappointment. Its abysmal battery life, laughable accuracy, and propensity for producing fake numbers have shattered any semblance of trust I might have had in its functionality. I could forgive any of these problems if only it would actually accurately read radiation levels. I would strongly advise anyone considering buying this geiger counter to think twice and explore more reliable options on the market. Please look at the other 1 star reviews and videos and notice the random CPM and see how many people have the same problem I have. Your safety and peace of mind deserve better than this sorry excuse for a radiation detection device.