The new lightweight model of the popular Roll-A-Meter is a simple and accurate device for measuring air content of concrete mixes. It is often used with lightweight aggregate concrete. The new lightweight anodized aluminum version weighs only 10.5 lb (4.8kg), less than half the weight of earlier bronze models. The base and top are fastened with quick acting clamps after concrete sample is placed in base. Water and isopropyl alcohol are added to zero mark on neck, and meter is inverted, rolled, and rocked until air is removed from concrete. Percent of air is read directly from liquid level on scale.

The HM-32L Lightweight Roll-A-Meter may also be used as a pycnometer for determining specific gravity of sand, gravel, and cement. Unit is supplied complete in wooden carrying case with straight edge, tamping rod, syringe, baffle-bottom funnel, and instructions. Base is 130 cu. in. (2130ml). Overall height: 22" (559mm); Max. diam.: 8" (203mm). Shipping Data: 25 lb (11.4kg); 2.3 Cu.Ft.