A hazardous area is a location which either has or may have an explosive concentration of gas, vapour or dust. Areas classified into zones (0, 1, 2 for gas-vapor-mist and 20, 21, 22 for dust) must be protected from effective sources of ignition. An area that has the presence of flammable gas. Hazardous areas are divided into the following: Zone 0: > 1000 hours /year Zone 1: 10 to 1000 hours/year Zone 2: < 10 hours/year An area that has the presence of Hazard - Dusts: Zone 20 - A place in which an explosive atmosphere in the form of a cloud of combustible dust in air is present continuously, or for long periods or frequently. Zone 21 - A place in which an explosive atmosphere in the form of a cloud of combustible dust in air is likely to occur in normal operation occasionally. Zone 22 - A place in which an explosive atmosphere in the form or a cloud of combustible dust in air is not likely to occur in normal operation but, if it does occur, will persist for a short period only. Mobile Phones Zone 1/21 suitable for use in Hazardous area with Conditions zone 1 and zone 21 and compatible ATEX approved. Bornika is the exclusive agent of i.safe mobile Company in the fields of consultation , sales and distribution of power industry products including Explosion protection mobile.