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 0-20mAdc, 4-20mAdc, -20 to 0 to +20mAdc output, 5-digit display, RS485, 2 solid state relays, 2 mechanical relays, with standard, NEMA 4x or explosion proof enclosures.