]Hazardous Area 802.11

• Provide completely safe wireless operation in hazardous areas.
• live workable, meaning that in many situations a gas clearance certificate is not required to work on the equipment and can reduce costs when performing maintenance, installation, testing or replacing devices.
• Features such as I.S. power over Ethernet (PoEx), WDS repeaters and encryption ensure secure transfer of data with the ability to deploy wireless systems over a wide area.

https://www.mtl-inst.com/images/uploads/datasheets/9469-ETplus.pdf