Absolute Process Instruments Inc. (API), was founded in 1987 as a manufacturer of signal conditioning products for the industrial marketplace. All our products are designed by our engineering staff and assembled in our Illinois facility, with the intent of providing a high quality and versatile product line. This effort is backed with a total commitment to customer service and support.

At API, we measure our performance by our ability to provide the right product for a customer's application in a timely manner, and we measure our commitment by offering a lifetime warranty on our products. Our approach to each business opportunity is with the attitude depicted on our corporate emblem:

"Facta non Verba" translated "Deeds not Words"