Radex One Compact Dosimeter Geiger Counter Radiation Detector Meter

I spent a lot of time brooding over which radiation detector to buy and eventually settled on this one. I think it's awesome. I've had it for several months now and it works great, cycles fast, came calibrated, and it's slim and fits in my pocket. I don't carry it everywhere but when I first bought it I would keep it in my jeans pocket, as it's slim and since the display is on the top you can just glance down to read it and don't even have to pull it out. I'm very pleased and I found their customer service to be excellent, as they responded very quickly to some questions I had about the software (which also works really well). This was my first radiation detector/dosimeter and I definitely think this was the right one to pick!

First the Pros : small and compact, easy to operate, shows total dose, current dose rate and counts per second. And the cons: The warning beeper and vibration are woefully quiet/weak if you are anywhere except a totally silent room you would not hear the alert (bit of issue if you are trying to keep away from anything that may be a source). The connection to a computer for data display is laughable, the unit stores no data at all!! when you hook it up to a computer it only displays the data from when you hook it up meaning a small portable device can only record data if it is hooked up to a not so portable computer with a USB lead There is no Max dose rate feature, look even garden digital thermometers have a feature where you can view the max and then reset it, it would have been really really handy on this as you could have seen if there was anywhere since you last reset that gave a high instantaneous dose and maybe you shuld go an have a check. I know the argument is that you get the same functionally from a film badge, it gives you total absorbed dose and does not let you know what is going on at that moment, but this device could do that and quite frankly it should do that without having to stare at it constantly (or have to keep it gripped in the palm of your hand so you can feel it vibrate as anywhere except for a silent room you won't hear it beep) So it does its job but it could be so much more useful.

Honestly I like it more than I thought I would, it fist like a pen in the pocket of your shirt, I wanted this due to Fukushimas ongoing problem .. a bit of peace of mind, I tested it on my old smoke alarm in my house and it worked great, I got a reading of 20 microsiverts so I got rid of it. Pros: very accurate, connects to the pc instantly, very fast response to radiation. Cons: price quite high but on this level of accuracy it costs money, very small lcd, hard to read, and also a headphone jack would be great as the sound scares people and the vibration is to low. I would recommend buying this if you worry about your family in a world with Fukushima ongoing for a long time..

Initially gave a very good accurate reading, battery life was good too, but used indoors, not in a hot or cold area, no drops or knocks, it stopped working after 14 months. Test kit should be well made and last well. This didn't. I emailed the manufacturer several times but got no response. Very poor, and not worth trusting Radex products.

I loved it,it was much better than cats. Works well ,appears to self calibrate and finds back round first takes about 10 seconds then its ready to go. Very light and small (About the size of three bic lighters) but solid construction and it's got a serious Muller tube inside, one of the metal colour ones probably russian.....those russians seem to know a thing or two about making a good Geiger needs must I suppose.

Display faded after a while, and cannot be repaired...

A quality dosimeter and counter - works especially well when connected to the PC for logging and analysis. Ready to go directly out of the box with excellent battery life (3 weeks with the unit on 24/7). Notably, the RADEX ONE contains a full size SBM-20 making it as capable as units of considerably higher cost. Perfect for detection, logging and analysis of Beta and Gamma ionising radiation.

Neat, small, and easy to use. Press on and it reads uS/hr, press again and it reads uS total accumulated while it was on. This total is retained and incremented constantly whenever the device is on, until you reset it to zero. Press again and it gives counts. Press and hold for off. The second button is menu, and I found it a bit tricky to get to reset, but ok once you are used to it. I'd like to have seen a diagram indicating where the sensor is, and how big it is, for lining up around a dental x-ray beam with collimator to measure the spread and the scatter. I used it at the dentist's, clipped to my collar to measure dose near the thyroid and it registered 0.12uS - a pleasingly low figure, though I remain skeptical as to whether X-rays might be more damaging than is thought to the brain, since epidemiological research is mostly based on gamma radiation exposure in Hiroshima. Background in my home in Suffolk measures around 0.12 uS/hr (integrated over ten hours to get a valid average it read 1.2uS). As it appears in bursts I suspect the main contribution is from cosmic rays rather than the ground. In Derby I get around 0.2uS/hr. Wonder what figures people get in Cornwall and other rocky areas?