From the use environment, walkie-talkies are classified into explosion-proof and non-explosion-proof walkie-talkies.
Explosion-proof walkie-talkies are radios that have been approved to operate in explosive gas environment.
Explosion-proof walkie-talkies do not mean walkie-talkies that can resist explosions themselves, but rather walkie-talkies that can work in explosive gas environments.
Applicable to the environment with harsh environment, dangerous flammable gas or dust, but in order to ensure normal work and improve work efficiency, it is still necessary to use a walkie-talkie as a necessary communication tool. Such as petrochemical, coal mine, chemical, thermal power, food processing, other industries, and so on.
The appearance of explosion-proof walkie-talkies is not different from that of ordinary walkie-talkies, but the materials and physical characteristics used are very different from ordinary models. So if the cover of explosion-proof walkie-talkies is broken, don't use them in a dangerous atmosphere, otherwise it may cause explosion or fire.
First, we need to select the walkie talkie that passed explosion-proof certification test with explosion-proof mark.
Then in reference to explosion-proof mark, you can select that meets requirement. For example Retevis RT56, its explosion-proof mark is Ex ib IIB T4 Gb.
ib- Limit the energy of the ignition source
IIB- Minimum current ratio≤0.8, >0.45, such as Ethylene
T4- maximum surface temperature 135℃
Gb- Equipment protection level