WirelessHART devices are HART devices that communicate wirelessly, so if you know HART, you are already familiar with and have the tools to use WirelessHART devices. WirelessHART is approved as an international standard IEC62591 that is open and free to use with dozens of vendors supporting it, with Emerson leading the way with the Rosemount Wireless range of installations in process applications. WirelessHART can be used on existing wired instruments to collect the vast amount of information that was previously stranded in the instrument, and also provides for a cost-effective, simple and reliable way to deploy new points of measurement and control without the wiring costs.