Guardian’s DTT-V/DTR-V SERIES VoIP Non-Hazardous Telephones are designed to provide safe, reliable communication in industrial areas that are prone to “moderate” harmful environments, where consumer phones are not suitable. Dust and Corrosion resistant.

Guardian’s DTT-Z/DTR-Z SERIES Analog Hazardous Telephones – ATEX-IEC certified products provide safety and protection in atmospheres where a mixture of air and flammable substances in the form of gas, dust, vapor or mist are present frequently, continuously or for long periods.

Guardian’s DTT-V-H/DTR-V-H SERIES Desk/Wall Mount Industrial VoIP Hazardous Telephones are designed to provide safe, reliable communication in industrial areas that are prone to “extreme” harmful environments providing communication in Class I, Division 2 areas, ensuring high quality communications under extreme working conditions.