The Universal Dimensionair line of air gages from Mahr Federal combines the performance of a single-master air gage system with the ability to use two- master air gage tooling. In single-master systems, the gage is calibrated to zero or a reference measurement, and users rely on the gage system accuracy to determine tolerance limits. Dual-master systems use two masters to calibrate maximum and minimum. For go/no-go applications, the air gage is usually calibrated with both masters or setting gages set for both tolerances. Built-in magnification and zeroing controls allow the product to act as a dual- master air gage comparator. By selecting the appropriate dial configuration, users can adjust the gage for dual-master air tooling or span master tooling, according to the company’s press release. The user sets system sensitivity (scale factor) by adjusting the air comparator span to correspond to the difference between minimum and maximum setting masters, thus setting the sensitivity of all the components of the gaging system. A zeroing control brings the span to a balanced position on the dial. The Universal Dimensionair is available with a range of interchangeable dials for selecting magnifications from 1,250:1 to 10,000:1 in inch or metric scales. Dials are quickly exchanged by a snap-off bezel that allows for changing while protecting the gage against contamination from the shop environment. An analog dial provides fast visual representation of size and degree of good/bad or approaching readings. Lastly, tooling can be mounted directly on the front of the unit. This lets the Universal Dimensionair act as a bench gage where the parts are brought to the air tooling. When the parts are too large for a bench-mounted gage, a hose and handle assembly provide portable measurement on the part.