 | AI-TEK Instruments, LLC (Cheshire, CT) AI-Tek Instruments offers fast response and high-precision tachometers for monitoring and protection. Field programming allows easy installation and upgrading, while minimizing part number variations. Options include 0-20 mADC, 4-20 mADC output, 4 1/2 digit display, RS-232, and relays in NEMA 1, NEMA 4X or explosion-proof ratings. | .jpg) |