Home Product [ SP,PH ] - Miscellaneous Equipment PH100-013 WATER MANOMETER, U-Tube. PH100-013 WATER MANOMETER, U-Tube. Enquiry Video Download Catalog GENERAL DESCRIPTION This manometer employs clear acrylic tubes with pressure ports at the top. Range 300, 450 or 950 mm. Application Differential pressure for air Net dimensions WxDxH 12x5x42 - 107 cm. OPTIONAL EQUIPMENT