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MR Series Submersible Microphones

Knowles Acoustics’ MR Series features a waterproof bellows assembly

MR Series Submersible MicrophonesKnowles Acoustics' MR Series microphones combine conventional elements with waterproof bellows assemblies. These bellows conduct sound to the elements and survive 15m (50 feet) of submersion in water. They may be panel mounted or attached for boom applications and are suitable for outdoor use or repeated submersion.


  • Conventional element with waterproof bellows assembly

Digi-Key P/N Mfg P/N Dimensions 1kHz Sensitivity Response Directional Noise Max
(Input Ref.)
423-1015-ND MR-23151-000 22.12mm dia. x
9.3mm height
-87.5 12 dB/oct Omni n/a Datasheet
423-1016-ND MR-28406-000 22.12mm dia. x
7.6mm height
-60 Std Omni 30 dB