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Model 30-7

The 30-7 series models, manufactured by Ludlum Measurement Inc., are portable, lightweight neutron detectors consisting of a digital ratemeter (Model 30) with a 19.5 cm diameter boron-coated polyethylene moderating sphere containing a 3He detector.

The instrument can detect neutrons from the energy of thermals up to 12 MeV and applies an inverse RPG curve for neutrons of energy up to 7 MeV.

Using the display unit, it is possible to select 3 measurement modes (RATE, COUNT and MAX) and the unit of measurement between cps, cpm, rem/h, or Sv/h.

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