Profile: The Henry P. Thompson Co., The specializes in the water and waste water equipment industry. Our products include small flow treatment systems, sensors for continuous measurement in waste water treatment, progressive cavity and tornado positive displacement pumps. Our small flow treatment systems used primarily in the waste water treatment, water reuse and septic treatment markets as well as for odor control. Our sensors for continuous measurement are used in waste water treatment processes including pH, suspended solids, level & pressure, and sludge blanket applications.