Has direct reading air and water scales 100 mm in length, and are accurate to ±5% of scale length or ±2 mm (whichever is greater). White background with permanent ceramic scales for easy reading. Comes with protective all-plastic shield. Fluid will only come in contact with glass and Teflon. Standard pipe thread on ends and Teflon insert will also allow use of flexible hoses. A gas-tight connection is assured by O-ring seal. Measure higher flow rates using stainless steel floats and correlation table (both included).