The Dwyer 109 Solid Plastic Portable Manometer is a precision instrument with an inclined well-type style for the measurement of static pressure, vacuum or differential pressure. To assure the accuracy required in instruments of this type, all machining of bores and wells is to the highest standards of precision backed by Dwyer’s years of experience in the fabrication of acrylic instruments.

Portable and highly accurate, this instrument accurately determines the volume of air flowing through air conditioning coils. An indispensable aid in proving out cooling system installations, the Dwyer Air Volume Gage helps to avoid poor performance and mechanical failure. It shows the installer or engineer exactly when more or less air is needed to keep within the critical limits necessary for the most efficient and trouble-free cooling system operation.

Simply level, adjust for zero, attach static lines and insert Trail-Tails in test holes. Pressure drop is then read in inches of water column. The reading can be quickly converted to volume flow by referring to the manufacturer’s pressure and flow curves furnished with the cooling unit.