Direct-Reading Dosimeter W138

Arrow-Tech dosimeters are rugged, precision instruments about the size of a pocket fountain pen, which are used to measure accumulative doses or quantities of gamma & X-ray radiation. A metal clip is used to attach the dosimeter to an individual’s pocket or to any available object in an area to be monitored for total radiation exposure.


Radiation Detected: Gamma and X-Ray from 16 keV to 6 MeV

Range: 0-200mR

Detector: Fiber-Electrometer mounted in an Electrically Conductive Plastic Ion Chamber

Detector Housing: Very low permeability plastics – Hermetically-Sealed

Accuracy: +/– 10% of true exposure

Rate Response: Dose rate-independent for Gamma and X-Ray

Electrical Leakage: Less than 1.0% of full scale for 24 hours at 50 C

Temperature Range: -20 degrees C to +50 degrees C

Relative Humidity: Up to 90%

Dimensions: 4.5” (12.4 cm) Length X .6“ (1.5 cm) Diameter

Weight: 1.0 oz. (25 grams)

Finish: Natural Matte Gray with a Metal Clip

Specifications: ANSI N13.5 and ANSI N322-1997

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