The B80 microphone is a military grade microphone suitable for use in marine environments and potentially hazardous environments. The microphone conforms to DEF-133, Class N1, and SES-5 standards on waterproofing, shock and vibration resistance.
The microphone is also ATEX approved as intrinsically safe for use in flammable atmospheres (Groups 2a, 2c, 2d and 2e) when mounted in a permanent position.
The microphone inset and switch assembly, housed in a watertight case of cast aluminium Type LM6M, presents a very compact unit suitable for installation in exposed conditions where its robust construction will withstand heavy duty for long periods without attention. The on/off switch operates a spare set of contacts for remote control applications and may be internally set to biased or unbiased modes. The microphone has connections for a relay circuit with the choice of either series or parallel operation.