Applicable to control room, driller room, workshop, hazardous goods warehouse in petroleum, chemical, military, power utility, marine engineering and other fields where flammable gas or vapor may react with air to form explosive gas mixture in a normal operation.

Applicable to control room, driller room, workshop, hazardous goods warehouse in petroleum, chemical, military, power utility, marine engineering and other fields where flammable gas or vapor may react with air to form explosive gas mixture in a normal operation.

Applicable to control room, driller room, workshop, hazardous goods warehouse in petroleum, chemical, military, power utility, marine engineering and other fields where flammable gas or vapor may react with air to form explosive gas mixture in a normal operation.