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Portable flow & pressure test instrument with data logger The Flowmaster 250DL measures the flow rate and the pressure at every water drawing off point and produces verifiable reportsThe Firemaster Flow Meter combines a flow sensor and an electronic board with display in a splash proof plastic IP65 enclosure.A compact ready to use hydrant flow/static pressure metering system. Designed to fit directly on to a hydrant standpipe where flow discharges horizontally.Only trust the best! The most highly accurate portable flow meter available on the market to measure flow for testing, training or active water flow operations. Genuine Akron quality.