Li-Foil Cover Image

Li-Foil Multiwire Proportional Counter (MWPC) Neutron Detector

Li-Foil Multi-wire Proportional Counter (MWPC) Neutron Detectors provide an affordable large-area alternative to the 3He-based and BF₃ detectors, maintaining a high thermal-neutron detection efficiency, at a comparable volume, mass, voltage, and power required. The Li-Foil MWPC can be integrated into existing electronics technology prepared originally for 3He-based or BF₃ detectors. There is a strong demand for light-weight, large-area, and high efficiency neutron detectors to be integrated into systems as a direct replacement for more expensive or outdated equipment. This offers an affordable solution while maintaining high neutron detection sensitivity and ruggedness that is known of 3He-based detectors.

Li-Foil Device Connection Image
Li-Foil Graph Image


  • γ-reject: <1:10-8  
  • Εthermal : 40(±1)% 
  • CPS/nv: 79.5
  • Standard Size: 19.625” x 2.25” x 1.38”

Electronics Integrated on Each Device

  • Vinput: 2.7 – 4.5 V 
  • Voutput: TTL or output driven
  • Temp. Range: -40°C to 85°C
  • Power: ~150mW total •Weight: ~1.6lbs
Compare gas-filled neutron detector technologies side by side.
Li-Foil Size Compared with a Backpack
R&D 100 - 2014 Winner Image




Our Distributor

RDT Markets and Distributes All RDT Developed Technologies, Excluding: 

–  MSND®  Technology

Distributors for MSND®  Technologies Are Listed Below:

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Rotunda Scientific Technologies, LLC

3732 Fishcreek Road Suite #913, Stow, OH 44224 USA

Tel +1 (330) 906-3403 Fax +1 (330) 294-0078

Exclusive Territories:

U.S.A & the Americas, Asia, Europe, Africa, Australia, New Zealand, Oceania