Thomas Products Div. (Sheboygan, WI) offers the Series 5002 miniature diaphragm liquid pumps, designed for all-liquid or mixed wet/dry pumping applications. Model 5002F pumps are single-head and measure 1.99 × 1.18 × 3.19". Model 5002FZ pumps are 1.99 × 1.18 × 4.88" and have twin heads. Both are oil-less. Standard materials include thermoplastic housings with ethylene propylene diene monomer diaphragms. Optional housing and diaphragm materials are available for use with aggressive media. Open flow is rated at 400 ml/min for single-head, and 850 ml/min for twin-head. Maximum pressure is rated at 40 m H2O, and maximum dry suction is 6 m H2O. Both 12 VDC and 24 VDC versions are available, with electromechanical compatibility protection included.