What is an Intrinsically Safe Cell Phone?
Intrinsically Safe Cell Phone aslo be called as ATEX explosion-proof mobile phone, it is purposed built for use in hazardous areas（For example, oil project, chemical industry,gas project,fire safety.etc）and offer a complete solution for the mobile worker with specific requirements of individual customers.
Here we would like to share some information about the intrinsically safe cell phone & its zone classification with you:
In DSEAR, an explosive atmosphere is defined as a mixture of dangerous substances with air, under atmospheric conditions, in the form of gases, vapours, dusts or fibres in which, after ignition has occurred, combustion spreads to the entire mixture.
Atmospheric conditions are commonly referred to as ambient temperatures and pressures. That is to say temperatures of −20 °C to 40 °C and pressures of 0.8 to 1.1 bar.
The ATEX Directive covers explosions from flammable gas/vapours and combustible dust/fibres (which, contrary to common perception, can lead to hazardous explosions)
Hazard – Gas/vapour/mist
Zone 0 – A place in which an explosive atmosphere consisting of a mixture with air of dangerous substances in the form of gas, vapour or mist is present continuously or for long periods or frequently.
Zone 1 – A place in which an explosive atmosphere consisting of a mixture with air of dangerous substances in the form of gas, vapour or mist is likely to occur in normal operation occasionally. – Click Here to check more Zone1 rugged phones
Zone 2 – A place in which an explosive atmosphere consisting of a mixture with air of dangerous substances in the form of gas, vapour or mist is not likely to occur in normal operation but, if it does occur, will persist for a short period only.Click Here to check more Zone2 rugged phones
Hazard – dust/fibres
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 of 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.
Effective ignition source
Effective ignition source is a term defined in the European ATEX directive as an event which, in combination with sufficient oxygen and fuel (gas, vapour, dust or fibres), can cause an explosion. Methane, hydrogen or coal dust are examples of possible fuels.
Effective ignition sources are:
Open flames. This varies from a lit cigarette to welding activity.
Mechanically generated impact sparks. For example, a hammer blow on a rusty steel surface compared to a hammer blow on a flint stone. The speed and impact angle (between surface and hammer) are important; a 90 degree blow on a surface is relatively harmless.
Mechanically generated friction sparks. The combination of materials and speed determine the effectiveness of the ignition source. For example, 4.5 m/s steel-steel friction with a force greater than 2 kN is an effective ignition source. The combination of aluminium and rust is also notoriously dangerous. More than one red hot spark is often necessary in order to have an effective ignition source.
Electric sparks. For example, a bad electrical connection or a faulty pressure transmitter. The electric energy content of the spark determines the effectiveness of the ignition source.
High surface temperature. This can be the result of milling, grinding, rubbing, mechanical friction in a stuffing box or bearing, or a hot liquid pumped into a vessel. For example, the tip of a lathe cutting tool can easily be 600 Celsius (1100 °F); a high pressure steam pipe may be above the auto-ignition temperature of some fuel/air mixtures.
Electrostatic discharge. Static electricity can be generated by air sliding over a wing, or a non-conductive liquid flowing through a filter screen.
Adiabatic compression. Air is pumped into a vessel and the vessel surface heats up.
If you are looking for a tough & safety mobile deive for your industrial project,the Conquest S12 ATEX Explosion-proof Intrinsically Safe Cell Phone would be your best choice