The pumps provide constant flow control up to 70-in. H20 back pressure at 1 lpm. The higher back-pressure allows for the completion of specialized sampling applications. The user-friendly device features a four-button design with lock-out and a memory-free NiMH battery.

Sensidyne Inc., 16333 Bay Vista Dr., Clearwater, FL 33760, (800) 451-9444,