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Exradin w1 main 1400

Exradin® W1 Scintillator

Water equivalent detector

Exradin® W1 Scintillator Overview

Point dosimetry that's invisible to the beam

  • Has a kQ of 1.000, making the W1 an ideal detector for SRS
  • Water equivalent
  • Inherently waterproof
  • Energy independent
  • Temperature independent
  • Pair the W1 with the SuperMAX Electrometer to effectively eliminate Čerenkov effect without the need for extraneous calculations.
  • The W1 can be connected to any dual channel electrometer


  • Scintillating fiber
    1.0 mm diameter x 3.0 mm long
  • Scintillator housing
    2.8 mm diameter x 42 mm long
  • Optical fiber
    1.0 mm diameter core x 2.2 mm diameter jacket x 3 m long
  • Photodiode enclosure (LxWxH)
    80 x 46 x 30 mm
  • Weight
    0.34 kg (0.75 lbs)


  • Scintillating fiber
    Polystyrene with fluorescent dopants
  • Optical fiber
    Acrylic (PMMA) with Polyethylene jacket
  • Scintillator enclosure
    Epoxy potted within an ABS plastic tip and polyimide stem
  • Optical fiber minimum bend radius
    6 cm
  • Scintillating fiber physical density
    1.05 g/cm³
  • Nominal response
    60 pC / Gy
  • Radiation degradation
    ~ 2% / kGy




    Jun 1st, 2023 / Truly Water Equivalent Detectors

    Exradin Scintillators are ideal for commissioning SRS and SBRT. Invisible to the beam and providing measurement resolution down to 1x1mm, these detectors are exactly what you need to have confidence in your small field commissioning.

    Mar 9th, 2023 / Tools for Scanning Small Fields

    Small fields have met their match. The Exradin Scintillators ensure the tightest treatment margins are delivered safely to patients. Discover the advantages of using these detectors that are invisible to the beam and water equivalent.

    Feb 16th, 2023 / The Small Field Detector

    Ideal for commissioning of SRS and SBRT techniques, the Exradin W2 Scintillator has a point dosimetry measurement down to 1x1mm. Measure your smallest fields accurately with this detector that’s completely invisible to the beam.
    Exradin w2 main 1400

    Mar 3rd, 2022 / Water Equivalence is Key

    Small fields have met their match. The Exradin W2 Scintillator has unbeatable water equivalence to help you overcome the complexities of measuring small fields. Join us March 3rd at 10:00 am CST to learn how this detector conquers small field challenges.
    Index Exradin W2

    Jul 26th, 2021 / Small Field Measurement with MR compatibility

    New! Your favorite water equivalent detector just got better! Now available in a configuration designed for use with MR-linacs, the Exradin W2MR Scintillator easily handles tight treatment fields. Part of our AAPM webinar series.
    Exradin w2 max sd 1400

    Jun 24th, 2021 / Measurement Without Perturbation

    You’ve never been able to accurately measure fields this small. Learn about the ideal detector for the commissioning of SRS and SBRT techniques.
    012121 Webinar W2 Web

    Jan 21st, 2021 / Small Field Scanning

    Ensure the tightest treatment margins are delivered safely to your patients. With a resolution down to 1x1mm, this detector is invisible to the beam, water equivalent, and offers exceptional resolution.

Have Questions About the Exradin® W1 Scintillator?

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