A600DU Marine intrinsically safe digital radio Ocean one Walkie Talkie Marine Walkie Talkie Intrinsically safe Marine Radio,Marine radio II 2G Ex ib IIB T4 Gb Explosion levels EU ATEX intrinsically safe certification Passed CE, FCC, RoHS certification Digital intercom / analog intercom dual-use compatible Marine handheld radio UHF 400-470MHz The A600DU is an explosion-proof digital walkie-talkie. It is compatible with digital intercom and analog intercom. It has passed the ATEX II 2G Ex ib IIB T4 intrinsic safety certification of the European Union and meets the requirements of explosion-proof environment. It is suitable for Zone 1 and Zone 2 with IIA-IIB. T1-T4 explosive gas mixture site.   IIA IIB IIC T1(450) Methane, toluene, methyl ester,Ethane, propane, acetone,Acrylic, benzene, styrene,Carbon monoxide, ethyl acetate,Acetic acid, chlorobenzene,methyl acetate,ammonia Propylene, propylene Clear, dimethyl ether, Hydrogen cyanide, City gas Hydrogen, water gas T2(300) Methanol, ethanol, ethylbenzene, Propyl alcohol, propylene, butanol,Butane, butyl acetate,Amyl acetate, cyclopentane Butadiene, ring Ethoxyethane, B Ene, furan Acetylene T3(200) Pentane, pentanol, hexane, Hexanol, heptane, octane, Ethanol, turpentine, Naphtha, petroleum (including steam Oil), fuel oil,Pentanol tetrachloromethane Dimethyl ether, propylene Aldehyde, hydrogen sulfide T4(135) Acetaldehyde, trimethylamine Dibutyl ether, two Ether, ethyl methyl, Tetrafluoroethylene Carbon disulfide T5(100) Ethyl nitrate T6(85) Ethyl nitrite   Intrinsic safety marine radio adopts a new optimized intrinsic safety design. The battery adopts dual output current limiting protection and short circuit protection. The whole structure design is compact and reliable,with safe and reliable intrinsic safety performance, and is the ideal professional communication transceiver in hazardous gas working environment.