Features That Define the PMMN4067
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ATEX rating II 2G Ex ib IIC T4 Gb – safe for Zone 1 gas groups IIA, IIB + IIC (hydrogen, ethylene, propane)
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IECEx certificate IECEx IES 20.0007X – globally accepted, matching the radio certification for a complete atex walkie talkie solution
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IP68 sealing – dust-tight and submersible 2 m for 2 h; survives pressure-wash decon after shift
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Wind-porting microphone – blocks 100 km/h gusts while maintaining ATEX-approved acoustic path
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Intrinsically-safe piezo PTT – no moving electrical contacts outside the Ex barrier, eliminating spark risk
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Kevlar-reinforced 1.5 m coiled cord – stretches to 2.5 m; pull-tested 15 kg to prevent cable break and possible hot-surface exposure
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16 mm noise-canceling element – cuts 90 % background roar so only voice is transmitted, reducing repeat calls and air-time in hazardous areas
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High-vis orange emergency button – recessed yet glove-friendly; triggers man-down or priority call without removing the radio from the holster
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Wide-band audio 300–3,400 Hz – matched to Motorola AMBE+2 vocoder for digital clarity on motorola fire radio and motorola r7ex channels
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Factory-locked compatibility – plugs directly into DP4401Ex, DP4801Ex, and motorola r7ex portables; no adapters that could void Ex certification
