Virap Sales & Services offers Air Supply Unit with Digital Cyclic Timer. Virap Sales & Services also manufactures carbon sensors and carbon potential control systems. The Air Supply Unit with Digital Cyclic Timer has rugged double-diaphragm pump designed for an industrial environment. The Air Supply Unit with Digital Cyclic Timer has two-inch scales for readability and easy adjustment. This Air Supply Unit has replaceable filter which prevents particulate infiltration of the supply lines. This Air Supply Unit has steel-plated housing.