GQ GMC-500 Geigerteller, stralingsdetector, Beta Gamma röntgenstralingsmeter

Originally I bought a 500plus (from another supplier) but the "high rate tube" was faulty and in continuous avalanche. It was returned with no hassle.Since my geiger requirements are fairly modest I decided to go for the GMC-500 (single tube) as a replacement. This is a well built unit and easy to use. Many functions are menu-selectable and the displays and menu are fairly straightforward (with a Factory Reset if you mess things up).The unit measures counts-per-minute (CPM) and automatically corrects for "dead-time" (menu selectable ON/OFF) You can also vary the tube voltage to check that you are in the plateau region, although the factory setting is OK.Data can be saved as a time-series and subsequently transferred to your PC. [One of the variants of this device has GPS so that you can correlate CPM with location, but not this one.]You can also set the count time and many other parameters, too, incl. Wifi, Server and Third Party options (not tested). It can also display total count and elapsed time - useful for working out the +/- error rate.The in-built motion detector re-orients the display horizontally or vertically or even upside down, as appropriate. A rear key-hole enables you to mount the unit on a wall.Although the tube is small (70mm x 10mm, approx) it is perfectly adequate for my use.The device, as for all GMT's, counts the activity detected by the tube. Therefore if you want to know the isotropic activity of your radio-active source then you will have to estimate the "equivalent solid angle" of the tube as seen by the source.The device also displays micro Sieverts per hour. So do a lot of other GMT's. But this must be calibrated against a known source and target biology to estimate the energy deposited in the target and so this "reading" must be used with care.TIP: If you are using your device near to a radio-active source then put your device in a plastic bag so that it will not be contaminated.Overall a neat, versatile and robust hand-held device.

Bra kvalité och funktion. Perfekt för att detektera klockurtavlor med radiumfärg.

I purchased two of these radiation detectors for a project and they worked perfectly. Good quality and value for your money.

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Por fuera parece de mala calidad y más chino que la guarrería de más mala calidad que puedas comprar en un bazar, pero lo que importa es el funcionamiento. Está bien programado, la batería dura en contínuo más de una semana y muchas funciones y personalizaciones. Lo del wifi no lo usas a menos que montes un servidor, pero ahí está. Es muy sensible, rápidamente mide una mayor emisión de beta y gamma. Probado con uranio y con óxido de torio. Las luces beta no emiten suficiente radiación como para medirse