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The HIT-4G is a microprocessor-based gas flow rate indicator and totalizer with data logger and Modbus Communications Protocol. The instrument can accept a low-level signal from a magnetic type pickup coil, a DC pulse signal, contact closure or modulated carrier pickup (MCP/RF). Pulses from the signal input are converted into volume and rate values based on flowmeter calibration settings stored in the instrument. Temperature, pressure and compressibility compensation may be used to calculate corrected volume and mass flow. The total and flow rate are displayed on a two-line liquid crystal display (LCD). A 4-20 mA analog signal proportional to the flowrate is output on the current loop. The HIT-4G is configurable from the instrument front panel keypad or via Modbus communications.