The Utility Of Geiger Counters.

Geiger counters are devices which are used for detecting and measuring the ionizing radiation emitted by radioactive sources. Although Geiger counters are one of the oldest devices used for these types of activities, they are still very popular today. This is a consequence of the fact that they are one of the most sensitive radiation detectors, especially for low radiation levels which appear in most situations. Here at Gamma-Scout we are prepared to offer detailed information about the Geiger radiation detectors.

The Geiger counter was first invented in 1908 by two scientists: Hans Geiger and Ernest Rutherford. This initial version however was only able to detect alpha particles so there was still plenty of room for improvements. In 1928 Hans Geiger together with Walther Muller made several improvements to the device so that it could detect all sorts of ionizing radiation. The contemporary version of the Geiger counter was developed in 1947 by Sidney Liebson, has a much longer life than the earlier radiation detector and uses a lower operation voltage.


The purpose of a radiation detector is to identify ionizing radiation, usually alpha and beta radiation, but other types as well. The so-called Geiger-Muller tube is the heart of the Geiger counter. It is an inert gas-filled tube which conducts electricity when a photon of radiation makes the gas conductive for a brief while. The conduction is amplified by the tube so that it produces a current pulse. This pulse is what you see displayed by a needle or audible click on your Geiger counter. Modern Geiger counters also detect gamma radiation. Although so-called scintillation counters can also detect alpha and beta radiation, a Geiger radiation detector is generally preferred. The reason for this is that the latter have lower costs and a longer life span. Some variations of Geiger radiation detectors are also used to measure neutrons by using a special gas called Boron Trifuoride and a plastic conductor. The most popular radiation detectors however remain those which detect alpha, beta and gamma radiations.

There are several purposes a Geiger counter serves in the process of radioactivity detection. In the process of mineral prospecting such an apparatus is used to detect radioactive rocks and minerals. Fireman and police also frequently use a radiation detector when arriving on a scene and have the need to make an initial determination of the radiation risk level. Personnel in charge with the safety of nuclear power facilities constantly use Geiger counters for periodical evaluations of the radioactivity levels in the area and also to check for radioactive contamination on clothing and shoes.

Radiation detectors are also must have items wherever a nuclear accident or leakage occurs or in X-ray laboratories when suspecting leakages. Also in the medical field, these devices are used to check lodine 131 levels of cancer patients undergoing radiation therapy. A radiation detector plays an essential part in healthcare and environmental safety alike. For example, it is frequently used to make sure our food is not contaminated in any way. The Geiger counter also serves educational purposes, as teachers usually have make demonstrations for their students. Other uses of the Geiger counter can be found in the fields of archeology and anthropology or in businesses like oil drilling and scrap metal processing.

Although Geiger counters have numerous uses, they don’t detect absolutely everything. A Geiger radiation detector for instance, doesn’t detect laser energy. Other examples of what such a device can’t detect are microwave radiations and radon gas. Before purchasing a Geiger radiation detector make sure to be completely informed about what specific situations it can be used in.

Geiger counters have become indispensable devices since they were first developed in 1908. There are countless uses for these radiation detectors and the device is continuously being perfected. We welcome you to visit our website and find out more about what a Geiger counter can do for you.

By: Ken Wilson

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At gammascout.com we offer detailed information and guidance for anyone who wishes to purchase e Geiger radiation detector. We know everything there is to know about Geiger counters and are more than happy to share our knowledge with you.

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