Replacement Air Pump fits Gilson Concrete Air Meters (and those from other manufacturers), with solid construction that offers a longer service life. Replacement Gauges are quality, dependable gauges that fit most Type B Concrete Air Meters. HMA-368 Concrete Strike-Off Bar is used to remove excess material. Tamping Rods have hemispherical tips and are for use when consolidating concrete specimens in required tests that include slump, air content, and strength. Gilson Concrete Air Meter, with Gorilla Gauge or Stainless Steel Gauge. The sturdy plastic carrying case is fitted to carry all required components. New precision Gorilla Gauge features a rugged plastic housing and safety glass. Accurate, high-quality, and easy to use for testing air-entrained concrete. See our full line of Concrete Air Meters. A threaded bezel with a gasket seals the safety glass lens. The sturdy industrial rack and pinion mechanism is accurate to ☑% of full scale. HM-30S uses a dependable and accurate American-made gauge with stainless steel housing. The dual-layer safety glass lens is sealed behind a threaded bezel with O-ring. The Gorilla Gauge is ANSI-rated B40 Grade 2A with accuracy ☑/2% of full scale. Micro-adjustable calibration screws ensure superior accuracy and save time during calibration and maintenance procedures. HM-30 features our exclusive Gorilla Gauge, a rugged German-engineered gauge with precision jeweled movement and a high-strength Polymid B molded housing that is waterproof and rustproof. The sturdy plastic carrying case holds a meter with all components securely in die-cut foam padding. Calibration Vessel, Calibration Tubes, Tamping Rod, Aluminum Straightedge, Syringe for water, Carrying Case, and operating instructions are all included. The accuracy of the Gilson air meters exceeds ASTM requirements. The cast aluminum base volume is 1/4ft³ and can also be used for unit weight and yield determinations. Petcock handles are vinyl coated for more comfortable operation. Brass petcocks have stainless steel ball valves for accuracy and durability. It is shielded to keep dirt and water out of the piston area. A built-in pump with a large, easy-grip handle builds pressure in the meter quickly. Long-lasting stainless steel clamps adjust quickly and are less expensive to replace. Other features of the two units are identical. Our HM-30 model features the exclusive Gilson Gorilla Gauge, while the new, economical HM-30S offers an American-made stainless steel gauge. 
Gilson's high-quality Type B Concrete Air Meter measures air entrainment from the fresh concrete sample in the base.
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