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GQ GMC-300S Digital Nuclear Radiation Detector Monitor Meter Geiger Counter Radiation Dosimeter
The GQ GMC-300S digital Geiger counter is the latest general purpose Geiger Counter. It is developed by GQ Electronics LLC, Seattle, WA USA.
As an enhanced version, it has higher sensitivity to facilitate a lower level radiation detection. It also has LCD contrast control, front LED indicator, analog data port output, new graphic display, speaker on/off features. It also has unique features, such as, record data first play it back later; open protocol for easy application integration; visualize real-time graph, data logging. Portable and convenient with built-in audible and visual signals, it features automatic data recording. It is able to continually monitor the radiation and log the data each second into internal memory.
When connected to a PC, GQ software can download the radiation history data to the computer and the user is able to analyze those data later. the device uses USB port for communication and power. The internal battery can be charged via wall adapter or car adapter.
Warning: Only use with a 5V AC adapter. Do not use adapters with a voltage above 5V, including 12V or higher.
-Measures Various Types of Ionized Radiation: Beta, Gamma, and X-ray Nuclear Radiation
-Dosimeter Function
-A Lanyard for Drop-proof Protection
-Graphic Display: Bar Chart & Line Graph
-Rechargeable and Replaceable Battery
-Audio or Data Port
- Multiple Display Modes
Free PC Software and Worldwide GMC Map
Our free PC software and GMC Map support the following features: downloading history data from PC, generating radioactive decay graphs, accessing downloaded internal memory data on PC, and retrieving online historical data. Free 3rd party software supports Mac.
Oleksandr Marar
Reviewed in Germany on March 4, 2025
I'm totally satisfied with device
Jonathan Burne
Reviewed in Australia on February 26, 2025
The GQ GMC-300S Digital Nuclear Radiation Detector Monitor Meter Geiger Counter has proven to be an invaluable tool in my watch servicing hobby. I use it specifically for checking if watch dials contain radium, and it performs this task with remarkable accuracy. The digital display is easy to read, and the device is user-friendly, making it simple to operate even for those new to radiation detection. Its sensitivity and reliability provide peace of mind when working with vintage watches. This Geiger counter is a must-have for anyone needing precise radium detection at a great value.
SM
Reviewed in the United States on February 18, 2025
Exactly as described and well worth the price. I've tested this against some known elements in my collection and the counter works well. The interface is intuitive and easy to navigate to change various settings and customize the display.I chose this as an economical option that would still allow me to have audible and visual queues. The ability to view the data (including as a graph) and export it is appreciated, as is having a quick tool for the standard conversions and equivalent metrics of Sieverts, Rads, CPM and dose etc.Would also note the battery came charged and has held up well for hours now. I look forward to taking this on my upcoming trips to the odd mineral shop or planned conventions.Don't look at other cheaper options on Amazon from xyz brands and vendors... This product has the quality you are really looking for.
Dustin
Reviewed in the United States on February 17, 2025
I like it, it has all the base functions. I am near a military base, so it's always nice to have peace of mind. The clicking can be a little ominous when the device is getting a reading, but I have yet to see it go over 28 CPM. Also it came with a rechargeable battery which is nice, and I've had the device on for 24 hours solid, and the battery indicator still shows 100%. Great buy so far!!
Joe
Reviewed in the United States on February 10, 2025
I got this to monitor the radiation during and after my RAI therapy. For the most part, it seems accurate. The first 24 hrs of my RAI, the radiation from my neck area was off the charts. It was interesting to see but also scary. I used it as a way to determine the distance to keep myself far enough during isolation. As the radiation decays, the distance you radiate becomes less too. I also used it to monitor the radiation from my pillow. I have a favorite pillow and the neck area was still high in radiation. It took about a month and a half for the radiation to come back down to normal levels. Even the pillow cover was still high in radiation too. Having this tool really helped ease my worries about radiation and affecting those around me. It was well worth it. Hopefully I don't have to go thru that again. For those that do go thru something like RAI, this tool is helpful and I wish you a speedy recovery.
Javier Aragón García
Reviewed in Spain on January 19, 2025
Es muy práctico, mide bien y tiene muchos más ajustes de los que pensaba. La aplicación de ordenador es un poco rudimerntaria, pero te permite exportar los datos a excell. Por el precio que tiene es uno de los mejores en relación calidad/precio
Mark Travis
Reviewed in the United States on June 26, 2024
I've worked in a facility that handles waste products that all have some level of radioactive contamination, so I am well familiar with Geiger counters. It appears to work well with a degree of accuracy. The manual is easy to understand and the functionality of the instrument and basic setup was straightforward. I like the fact that it has a built-in rechargeable battery, and a full charge will give several hours of operation.Hopefully, I will never absolutely need to use it, but in these times it was quite inexpensive and offers much mental comfort.
Customer
Reviewed in the United Kingdom on May 29, 2024
The media could not be loaded.
Biff44
Reviewed in the United States on December 31, 2024
i have no way to calibrate it, so no idea how accurate it is. but, background radiation is in the 0.005 or so mR/H. and when i brought it next to a reactive "Fiesta Ware" plate, it went off at 1.5 mR/h.so for finding stuff you might have that you do not want sitting around your house outgassing radon....it works perfectly
Mm
Reviewed in the United States on December 13, 2024
The media could not be loaded.
Jack Peduzzi
Reviewed in the United States on December 10, 2024
I bought this geiger counter to see if one of my clocks was made with radium. It detected the radiation coming from the clock and gave me a reading. I use this to hunt for radioactive objects such as uranium glass, radium clocks, and uranium-glazed items!
Stefano
Reviewed in Italy on October 31, 2024
Il GMC-300S è un modello di contatore Geiger che apprezzo per diversi motivi, ad esempio: è di progettazione americana🇺🇸 la batteria è sostituibile e facile da trovare, il tubo di Muller può essere sostituito facilmente ed il prezzo è inferiore a 100€.
Practical Guy
Reviewed in the United States on September 30, 2022
Not sure why companies just put such low effort into their descriptions but no where does it say why kind of battery this uses. When I received it I noticed its a special 14500 lithium cell. Its AA sized but I tried a regular AA and it will not work. It needs the higher voltage of the 14500 battery. I do really like that at least the battery is removable. That is important for long term storage so there is not parasitic power drain as most devices have. I think if we;re using a 14500 why not just use an 18650 and that would at least be something more common for preppers and much monger battery life. If using AA sized batteries like a 14500 it should be compatible with 1.5V common AA at least but its not!The GMC-300S itself is really nice, I like the display and user interface, the options for display backlight levels and timeout, speaker LED indication ON/OFF, alarm threshold and many other options are great to set up how you want. Overall happy with this unit for the price. I will begrudgingly get another 14500 battery to have a spare.
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