Model 133-4 GM Detector – Ludlum

The Model 133-4 GM Detector (Ludlum) is a gamma survey detector (GM) that can be used with any scaler instrument, portable ratemeter or area monitor that delivers the appropriate amount of voltage (see datasheet below) with an input sensitivity of 30 ±10mV.

Model 133-4 GM Detector features:

  • waterproof (optional)
  • halogen quenched
  • stainless steel tube
  • range: 0.01 mSv/h to 100 mSv/h
  • energy compensated GM

Read more about the Model 133-4 GM Detector on the

Ludlum Website

PDF and available downloads

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    One download is available for this product.

    Datasheet Model 133-4 GM Detector Ludlum