Excel manufactures laser heads of two sizes. Models 1001A and 1001F are the same size and are smaller than model 1001B. Mechanical variations of these are available on special order.
All of Excel's laser heads are calibrated against a frequency standard that is traceable to the National Institute of Standards and Technology of the United States Department of Commerce.
Each Excel laser head is capable of six simultaneous measurements. Special products are available for applications requiring more than six axes.