KNOWLES - MR microphone serie

Dimensions (mm):
Ø22.12 x 7.6 Ø22.12 x 9.3 Ø22.12 x 11.43
"Waterproof/Submersible omni mic MR models integrate BJ and WP Immersion up to 15 - 20m depth"
Key features:
The MR Series Assemblies consist of a microphone element attached to a bellows assembly.
They may be panel mounted, attached for boom applications, and are suitable for outdoor use or repeated submersion.

Highly waterproof – no loss of performance after immersion in 15-20 m water
Corrosion resistant
Withstands explosive decompression
Design proven in rugged environments
Cable wire attached
High resistance to mechanical shock
Acoustically transparent bellows
Resists effects of mud, sand, and salt encrustation
Reference Sensitivity @ 1kHz (dB re1V/0.1Pa DC Supply (V) Max. Amplifier Current Drain (uA) Typ. “A” Weighted Noise (1 kHz Equivalent SPL) Nominal Output Impedance (Ω) Comments
MR-23151-000 -87.0±3 N/A N/A 30.0 dB 300.0 2-Wire, 193mm Leads
MR-28406-000 -50.0±3 1.3 50.0 30.0 dB 3500.0 3-Wire, 202mm Leads