Which wireless standard was developed by ISA to compete with Wireless HART?

The correct answer is ISA100.11a because this wireless standard was specifically developed by the Instrumentation, Systems, and Automation Society (ISA) to provide a robust solution for industrial wireless communications, directly competing with Wireless HART. ISA100.11a offers features that cater to the needs of industrial environments, such as the ability to handle a variety of applications, support for secure and reliable data transmission, and interoperability with various devices.

Moreover, ISA100.11a employs a highly flexible networking technology capable of addressing the challenges posed by industrial operations, including scalability, energy efficiency, and robust performance in difficult radio environments.

While options like Bluetooth, Zigbee, and WiFi are also wireless communication standards, they were not developed specifically to meet the requirements of industrial process automation in the same way as ISA100.11a. Bluetooth is primarily designed for short-range personal area networking, Zigbee focuses on low-power applications for sensor networks, and WiFi is geared more towards general internet connectivity rather than the specialized needs of industrial settings.