Cole-Parmer unveiled its newest sampling pump: the Masterflex L/S. Designed with versatility and portability in mind, the Masterflex L/S portable sampling pump provides faster tubing changes and flow stability through the latest Easy-Load pump head, the company says. The variable-speed drive has a top speed of 400 revolutions a minute, allowing the operator to adjust the flow rate to the needs of the application. It can run as many as four hours on the self-contained 12 VDC rechargeable battery, or indefinitely from any AC or 12 VDC power supply. Users can charge the internal battery from an AC power supply or a DC voltage source of lower voltaic potential than the battery itself. Encased in a high-visibility yellow housing for easy recognition and recovery in the field, the pump is designed for use in environmental testing labs and anywhere a portable sampling pump is required.

Cole-Parmer, 625 East Bunker Court, Vernon Hills, Ill. 60061; 800/323-4340;