Forney Press-Aire Meter™, Unit Alone, No Case or Accessories

The Press-Aire^TM Meter is the industry’s most popular kit for testing entrained air. Whether going into the Ready-Mix truck or coming down the chute, it gives fast results. Always accurate. The kit contains everything needed to perform the test and — most importantly — to keep the unit in calibration.

This unit measures the air content in fresh compacted concrete. It consists of 2 main parts: the base (measuring chamber) and the cover assembly. It is supplied complete with calibration set.

The cast aluminum base, of cylindrical shape, has machine-flanged rims. The interior surfaces of the base and surfaces of rims, flanges and other component-fitted parts are machined, and these tapered, smooth surfaces facilitate frequent water clean-up. The unit is especially designed for easy disassembly to replace worn or damaged parts in the field.

The cover assembly incorporates a pressure gauge, air release lever, air bleeder valve, air pump and valves and petcocks used to perform both tests and calibrations according to ASTM C231.

To seal the cover to the base, there are 4 rugged stainless-steel clamps with quick locking action. The unit is unaffected by changes in barometric pressure. These clamps are resistant to corrosion from concrete, and they are easier to use and significantly less expensive to replace than older design clamps.

The new high-volume Super Pump requires fewer strokes to attain the test pressures. The check valve eliminates older design O-ring seal problems. The brass petcocks have ball valves for easy, durable operation.

The large 4-inch diameter sealed gauge with adjustable pointer and stainless-steel case is durable and easy to read and calibrate.

The unit conforms to ASTM C231, Meter Type B, and uses the principle of Boyle’s Law. The base has a capacity of 1/4 cubic feet. It can also be used for unit weight, volume, and bulk density determinations in field conditions. ASTM C-231 requires a capacity at least 0.20 ft3 (0.006 m3).