Chlor-Scale® 150 provides a simple and reliable method of monitoring chlorine, ammonia and SO2 cylinders. Solid PVC platform provides a strong defense against the corrosive environments associated with gas feed applications. Users can monitor a cylinder with either the hydraulic Century® dial or with the digital Wizard 4000® that can independently monitor up to four separate cylinders. Force Flow 1150-D Burnett Ave. Concord, CA, 94520