A dosimeter is an instrument that measures the amount of hazardous material to which something or someone has been cumulatively exposed. The most common is the radiation dosimeter, which measures a person's or object's exposure to radiation.
A dosimeter based on sensitized film is one kind of radiation dosimeter, but there are other different kinds, and film badges are becoming less common. One widely known dosimeter is the direct read "pen style" electroscope dosimeter. Another "pen style" dosimeter is a miniature ionization chamber, but like the film badge dosimeter requires special equipment to read it later in a lab. Probably the most commonly used type of dosimeter outside of emergency response is the TLD, or thermoluminescent dosimeter.
The radiation dosimeter was invented by Werner Forssmann and Burchard B. Harned in the 1920s. They developed the first wearable dosimeter to measure radiation exposure in workers.
Radiation is being releases from the reactor
Thermoluminescent dosimeter
Thermoluminescent dosimeter
A pilot would wear a film badge dosimeter to monitor their exposure to radiation during flight. This device measures the amount of radiation the pilot is being exposed to and helps ensure they are not exceeding safe radiation levels. Regular use of the film badge dosimeter allows for early detection of any potential radiation hazards and helps protect the pilot's health.
Nucleic acid amplification
A biodosimeter is a dosimeter used in biodosimetry - a device used to measure a dose of ionizing radiation.
Dosimeter badges typically do not detect exposure to alpha particles because alpha particles cannot penetrate the outer layers of the badge to reach the dosimeter inside. Alpha particles are stopped by even a thin piece of clothing or the dead layer of skin, so they are not typically captured by external dosimeters worn by radiation workers. Specialized internal dosimeters may be used to monitor alpha particle exposure if it is a concern in a particular workplace setting.
A radiac detects nuclear radiation. There are many types of radiac, some are: Geiger counter, ionization survey meter, scintillation counter, film badge dosimeter, electroscope dosimeter, electrometer, drift meter, cloud chambers, etc.
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