Isolated amplifiers are a category of industrial electronic devices rather than a specific brand. They are designed to provide electrical isolation between input and output circuits, ensuring safety and signal integrity in harsh environments. These amplifiers are widely used in industries such as automation, process control, and test & measurement. Leading manufacturers of isolated amplifiers include companies like Analog Devices (USA), Texas Instruments (USA), and Phoenix Contact (Germany). Their products typically feature high accuracy, noise immunity, and protection against voltage spikes, catering to applications like sensor signal conditioning, motor control, and data acquisition systems. Industrial suppliers like Radwell and Grainger often distribute these components as part of their automation and control product lines.