Microprocessor based vacuum gauge pressure sensors, vacuum pressure measurement hardware, namely, hot cathode ionization gauges, cold cathode ionization gauges, convection enhanced transducers, ionization gauge transducers, capacitance diaphragm gauge transducers, low pressure indicators, vacuum pressure indicators, high vacuum pressure indicators, ultra-high vacuum pressure indicators, thermal conductivity vacuum pressure transducers, thermocouple vacuum pressure transducers, differential pr...