Industry Leading Customer Service. Providing quality service and support is very important to Sierra Instruments and we value the relationship we have with our customers.

Manufacturers of digital sound, lighting and motion controllers and Simon Systems professional audio equipment.

We distribute 2D/3D profile Scanners and other precise measuring equipment like proximity switches.

Welcome to Advanced Digital, Inc. Home of the SimpleServo Advanced Digital is a designer and manufacturer of servo drives and amplifiers; Servo motors, cables and planetary gearboxes are also available. What's New Introduction Servo Amplifiers Motors Gearboxes & Couplings Cables & Accessories Controllers & Breakout Boards Pricing Reference Introduction to Advanced Digital Servo Product ...