This circular slide rule dial calculator helps engineers and technicians determine water flow in pipes and ducts with circular cross sections from 0.5 to 240 in., as well as open-channel areas ranging from 0.7 to 2,000 sq ft, the company says. Constructed of multicolor, engraved solid acrylic, the instrument measures 7 5/8 in. dia and comes with a carrying case and instruction booklet.
Hunter Products Inc., P.O. Box 6795, Bridgewater, NJ 08807; 800-524-0692, 908-526-8440; 908-526-8348 (fax); firstname.lastname@example.org (e-mail); www.hunterproducts.com (website).