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 Controle de qualidade em Radiodiagnóstico
Gammex DR1897 Pen Dosimeter
 
     Description: The Gammex DR1897 Pen Dosimeter is a low-energy, direct-reading radiation-measuring device made with special low-density walls that permit the penetration and detection of diagnostic x-ray energies. The pen size instrument contains an electrometer and an ionization chamber. To read the integrated exposure, the user looks through the dosimeter eyepiece while pointing the unit toward any external light source. The exposure is determined by the position of a hairline fiber against a graduated scale. A Dosimeter Charger is used to re-zero the dosimeter and can also be used to read the integrated exposure.

Specifications:

  • Energy Response
    • Radiation Detected: Gamma, x-ray from 20 keV to 2 MeV
    • Ranges: 0 to 200 mR
    • Energy Response: 160 keV to 2 MeV: ±10%; 40 keV to 160 keV: +20%, -10%: 20 keV to 40 keV: +20%, -30%
    • Accuracy: Within ±10% of true exposure
    • Rate Response: Dose rate independent for gamma and x-ray
    • Electrical leakage: Less than 0.5% of full scale for 24 hours at 50° C
    • Relative Humidity: Up to 90%
    • Detector: Fiber electrometer mounted in an electrically conducting plastic ion chamber
  • Material
    • Detector Housing: Very low permeability plastics; hermetically sealed
    • Clip: Glass fiber-filled, high-strength plastic
  • Dimensions
    • Size: 1.5x12.4 cm (ØxL) (0.6x4.5 in.)
    • Weight: 0.03 kg (0.06 lb.)

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