How to Detect Radiation
Radiation may be any type of energy that is emitted by a body. However, in common use it typically refers to ionizing radiation that's potentially harmful to humans. A Geiger counter is a common device for detecting ionizing radiation, especially gamma particles which are the most harmful. A Geiger counter detects radiation with a gas-filled tube that conducts electricity when it's struck by radiation. This closes an electrical circuit which then registers the radiation by making an audible "click" or moving a needle.
Instructions
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1
Check the batteries. Turn the Geiger counter on and press the button for testing the batteries, usually marked "bat". The batteries are good if the needle moves into the area marked "battery." Otherwise, replace the dead batteries with fresh ones.
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2
Measure the background radiation. Set the "F/S" switch to "S" for a slow response and turn the audio switch on. Set the range switch to its most sensitive position and take off the probe cover. Measure the background radiation for one minute and record the results. Repeat the background measurement several times and calculate the average.
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3
Prepare the Geiger counter to detect radiation on a person. Set the "F/S" switch to "F" for a fast response and hold the probe within an inch of the person's skin without allowing it to actually touch the person.
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4
Perform a radiation scan with the Geiger counter. Move the probe slowly over the person's entire body while maintaining a constant distance with the probe. Pay particular attention to the face and extremities.
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5
Locate contaminated areas. Generally, an area that has twice the background level of radiation is considered to be contaminated. Set the "F/S" switch to "S" to examine these areas more closely and get a more accurate reading.
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Tips & Warnings
Always consult a health professional if you detect twice the background level of radiation on a person.
