Madison Electric Products (Mentor, OH) has released the Model HPRT C-Face Magnetic Ring Encoder, compatible with AC vector drive applications. Standard features include digital square wave quadrature-signal (064, 128, 256, 512, 1024, or 2048 cycles per revolution), stainless steel components, detachable screw terminal block, and differential line driver output. A feeler gage to set the air gap (0.020 to 0.040") is provided. Both sides of the rings are C-face mounts. Input voltage is 5 VDC or 7 to 24 VDC, operating temperature is -40°C to +125°C. Options include a synchronized on-board index pulse, cable with gland nut, and 7- and 10-Pin MS or 10-Pin heavy-duty industrial connectors. The unit is short circuit protected.