Knowles' waterproof microphones are designed to survive complete immersion in water. Form factors include a miniature design that can be immersed in water to a depth of one meter, and a bellows design for depths to 15 meters. The bellows design may be panel mounted and is suitable for outdoor use and repeated submersion. The miniature design offers excellent noise canceling performance that is ideal for underwater sensors and instrumentation.


  • Highly waterproof and submersible
  • Withstand explosive decompression
  • Excellent environmental performance
  • Corrosion resistant

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MR Series

12.7mm dia x 22.23mm (0.5in dia x 0.875in) Conventional element with waterproof bellows assembly

WP Series

4.00mm x 5.59mm x 2.28mm (0.157in x 0.220in x 0.090in) Waterproofed to submersion in 3m water Omnidirectional noise canceling Close-talking (noise-canceling) Corrosion resistant Withstands explosive decompression Excellent environmental performance High resistance to mechanical shock Leads attached