An instrument which measures the amount of X-rays or other radiation received.
A device to record the amount of radiation received by workers with X-rays or other radiation, usually consisting of a small piece of photographic film in a holder attached to the clothing. At regular intervals the film is examined to discover the amount of radiation it (and therefore the wearer) have received.
A device for measuring the output of any ionizing radiation.
A device used to quantify the magnitude of x-ray or radioactive doses.