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Direct-Reading Dosimeter — W725
The W725 is a pocket-size carbon-fiber electroscope with an ion chamber for measuring accumulated Gamma and X-Ray exposure. Its direct-reading scale covers 0–5 R and it has a hardened sapphire viewing window.
Arrow-Tech, Inc. manufactures this dosimeter. Indo FlexDos is an official distributor of Arrow-Tech dosimeters.

Product information
The W725 is a pocket-size carbon-fiber electroscope with an ion chamber for measuring accumulated Gamma and X-Ray exposure. Its direct-reading scale covers 0–5 R and it has a hardened sapphire viewing window.
- Measurement range
- 0–5 R
- Radiation detected
- Gamma and X-Ray, 16 keV to 6 MeV
- Detector
- Fiber-electrometer in an electrically conductive plastic ion chamber
- Accuracy
- ±10% of true exposure
- Rate response
- Dose-rate independent for Gamma and X-Ray
- Temperature range
- −20°C to +50°C
- Relative humidity
- Up to 90%
- Construction
- Hermetically sealed; hardened sapphire viewing window
- Dimensions
- 4.5 in long × 0.6 in diameter, as listed by Arrow-Tech
- Clip
- Metal pocket clip
- Weight
- 1.0 oz (25 g)
- Standards
- ANSI N13.5 and ANSI N322-1997
- Warranty
- Two-year limited warranty
- Shelf life
- 20 years