Radiation Alert - Personal Pen Dosimeters Model W138 0-200mR

    The Direct-Reading Dosimeters are rugged, precision instruments. They are designed to measure and directly read, at any time accumulated dose of gamma and x-ray radiation exposure. The Direct-Reading Dosimeter is designed to satisfy military specifications for the IM-Series RADIAC METER and ANSI N13.5 and N322 requirements. The sturdy metal clip attaches the dosimeter to a pocket or any object to monitor total radiation exposure. They are hermetically-sealed and immersion proof.

    Radiation Alert Personal Pen Dosimeters Model W138

    Personal Pen Dosimeters Model W138

    Direct-reading dosimeter measures gamma and x-ray radiation exposure
    • Rugged charger requires no batteries — simply squeeze the trigger of this piezoelectric generator to move the hairline fiber inside the dosimeter back to zero
    • Clamping mechanism automatically locks the dosimeter in place
    • Charger is easy to operate and requires only few squeezes of the trigger for each dosimeter
    Personal, pen-style dosimeters clip easily to your pocket or a specific object to measure personal accumulated dose or quantity of gamma and x-ray radiation. Dosimeter is a conductive-fiber electroscope with a thin wall to allow penetration of radiation. Inside the dosimeter, the fiber moves across a predetermined scale to display the level of radiation exposure. Readings are easily displayed by holding the dosimeter up to a light source to view the scale — immediate results without external lab analysis. Order handheld charger (sold separately) to zero dosimeters and reset scale for repeated use.

    Direct-Reading Dosimeter with Sapphire Window

    Model W138  (Order 4329)

    The Direct-Reading Dosimeter is a pocket-size, carbon-fiber electroscope with an ion chamber for detecting and indication of integrated exposure to Gamma and X-Ray radiation. It has a thin wall which permits the penetration and detection of radiation.  This model comes with a hardened sapphire window that won't scratch even in the toughest of conditions.

    Dosimeters are extremely sensitive instruments. Although they are constructed for rugged use, they should receive the same care as a wristwatch. Since dosimeters are hermetically sealed at the factory, they cannot be repaired or adjusted in the field. Therefore, if instrument malfunctioning is experienced, the instrument should be returned to the factory or your dealer. Dosimeters may be maintained in operating condition simply by cleaning the eyepiece lens and the charging switch insulator with clean water and a cloth that is free of lint and grit. Make sure the charging switch insulator is absolutely free of lint and moisture at all times. Caution: Do not insert any sharp objects into, or tamper with parts in the charging switch recess. Irreparable damage may be done.

    Arrow-Tech, Inc. recommends a yearly calibration of the Direct-Reading Dosimeter which is generally consistent with good health physics practices. More frequent calibration may be necessary should the user's license require a shorter calibration interval.

    Licensed from the U.S. Government under Patent No. 5,426,305



    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

    Warranty:  Two Year Limited Warranty

    Shelf Life:  20 Years

    Specifications: ANSI N13.5 and ANSI N322-1997

    • Availability: In Stock
    • Model: Personal Pen Dosimeters Model W138

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