We needed an accurate yet affordable flow sensor to do BTU metering and came up with our own line of Helical Turbine Flow Sensors. The model we currently stock is 3/4" in diameter with a flow range of 0.83 - 83 LPM or 0.22 - 22 USGPM which makes it ideal for residential and light commercial flow rates. Each batch of sensors is calibrated to a specific pulse rate ranging from 400 - 450 dry contact pulses per liter. Made from glass fiber reinforced Nylon with stainless steel 316 shaft and Viton rubber O-rings, this flow sensor is well suited for applications with water temperatures between -15 to 90°C or 5 to 194°F. We bundle each 3/4" sensor with 1/2" NPT brass unions or tail-pieces for easy installation and removal.
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