The direct read rotometer kits offer versatility at a low cost. The product is compact and easy to disassemble and re-assemble for cleaning purposes. It features easy-to-read dual English and Metric scales, seven interchangeable direct read scales for common gases such as air, water, and oxygen. Meters are offered with or without built-in needle valves. These economical kits are ideal for laboratories, schools, or processes that use multiple gases.