Principle of operation
The Precisionaire Column Instrument is essentially an air flow indicator. Pressurized air suspends a float in a transparent tube; this float moves up and down in the tube according to the flow of air.

From the top of the tube, the air flows through a hose and exhausts through the clearance between the gaging device and the workpiece. The rate of air flow is proportional to the clearance, which is indicated directly by the position of the float in the column.

Precise amplification and linearity are permanently built-in; the only moving part is the float supported on a column of air. The easy-to-read scale shows size at a glance.

Versatility
Modular design means that complete instruments in any combination of columns and amplifications can be assembled in minutes. Amplification is entirely pneumatic and linear over the full scale. Amplifications from 62.5 to 1 up to 40,000 to 1 are available. The graduated scales enable maximum and minimum tolerance limits to be set to allow plenty of "come-up" and "go-beyond" for accurate, easy reading.

Single or multi-column flexibility
Modular Precisionaire Instruments can be adapted as desired for single or multiple, internal and external dimensional measuring. This modular "building block" design enables small, as well as, large shops to meet on-the-job inspection requirements with flexibility, speed, and economy. The modular columns and base panels can be stocked in the tool crib, ready to assemble quickly for immediate use.

Precisionaire Column Instruments can be used with all existing or new standard and special tooling without alteration. Standard 9" models are available in amplifications of 1,000, 2,000, 5,000, 10,000, 20,000 and 40,000 to 1; standard 15" models are available only in amplifications of 5,000 and 10,000 to 1. Conversion kits can be supplied for quick change to any standard amplification.

Precisionaire Gaging * How Precisionaire Works * Precisionaire Models
Air Gage Tooling & Accessories * P400 DRO Metrology Interface
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