The GMTX electronic indicator with microprocessor enhanced performance and LCD panel display of flow rate and total, designed for use with a metal tube variable area flowmeter for liquid, gas or steam measurement. Suitable for use with body options, the VAMPIRE (Variable Area Micro Processor Indicator Readout Electronics) has a totally solid state measurement system, eliminating mechanical hysteresis errors. Microprocessor interpolation between flow data points, stored in factory calibrated look-up tables, gives an improvement to ±1% accuracy for this technique.