• HM-30 Gilson Pressure Meter is higher quality, less expensive, and more accurate. "," • All components are supplied in our new sturdy and convenient carrying case. ","Gilson's HM-30 offers a higher-quality Type B Pressure Meter for measurement of concrete air content with many improvements that make it a better buy. Long lasting stainless steel clamps adjust quickly and are less expensive to replace. Larger gauge in stainless steel housing is easier to read, calibrate and sealed to reduce need for maintenance. Pump with large, easy-grip handle builds pressure quickly and is shielded to keep dirt and water out of the piston area. Brass petcocks have stainless steel ball valves for accuracy and durability. Petcock handles are vinyl coated for more comfortable operation.","Dimensions and accuracy of the pressure meters exceed requirements of ASTM. Included are: Calibration Vessel, Calibration Tubes, 24in (610mm) Tamping Rod, Aluminum Straightedge, Syringe for water, Carrying Case and operating instructions. Cast aluminum chamber is 1\/4ft³ and can also be used for unit weight and yield determinations. Sturdy plastic carrying case holds meter with all accessories securely in die-cut foam padding. Traditional Watts Press-Ur-Meter is still available as HM-30W. Type A Meter, which requires correction for barometric pressure, is also available. Inquire for details. HM-30 Est. Ship Wt.: 32lb (14kg).