Contamination detection device
A contamination detection device is used in radiation protection to detect impurities ( contamination ) by radioactive substances. It can measure alpha , beta and gamma radiation. For this purpose, the contamination detection device is moved close to the area to be tested or the part of the body to be tested. Radiation that occurs triggers electrical impulses in the detector . The impulses are made audible as crackling or beeping in the loudspeaker, and their counting rate is indicated in digits or by a pointer instrument.
The hand-foot monitors that must be used when leaving controlled areas are also contamination detection devices.
Digitally indicating contamination detection device, consisting of a dose rate meter combined with a contamination probe
Incidence window on the underside of the contamination probe. The probe is a flow proportional counter
Digital contamination detection device with thin-layer plastic scintillator (170 cm²)
Measuring principle
Contamination detection devices mostly work on the principle of the proportional counter or the Geiger counter . In these counting tubes, either a propane - butane mixture or xenon is usually used as the measuring gas. Newer models use a scintillator .
Individual evidence
- ↑ Operations leader wiki: Radiation protection measuring devices