Instantaneous flow indicator with lower & upper limit contacts: Most suitable for measuring the flow rate of opaque liquids (oils), salurry liquids, high temperature and high pressure liquids. Can be fitted in any position regardless of the flow direction of the liquid to be measured. Depending on the place it is used, the vibration proof type is recommendable. Please specify the diameter in the range of 3/8B - 12 B. Please specify the body material from FC, BC, SS41, SUS304, 316, 316L, P.V.C. Please specify the main parts materials from BsB, SUS304, 316, 316L..