Cole-Parmer Instrument Co.

Duplex Chemical-Feed Pump Systems
Easy to install, these duplex chemical-feed pump systems are designed such that in the event of a primary pump failure, the standby pump provides an immediate replacement. In addition, the systems can also be used to double the flowrate of a fluid, or to pump two separate fluids simultaneously. They are available in various configurations, including: a manual control system with duty standby pump; 4–20-mA control system with duty standby pump; pH pump system with duty standby pump; and pH pump system with separate pumps. Customized systems are also available.

Cole-Parmer 2007/08 catalog
More than 60,000 products, among them 11,000 new items, are featured in the 2,600-page, 2007/08 catalog. It includes the Masterflex tubing pumps, along with test, measurement and process control instrumentation, flowmeters, fittings, valves, tubing and hose, mixers, filtration equipment, and more.