The Avery-Hardoll MASTERLOAD II is a powerful and versatile microprocessor based electronic controller. The unit is capable of enhancing the performance of most makes of positive displacement and turbine meters. MASTERLOAD II is an intrinsically safe system, ideal for use in Category 2 hazardous areas. The system is comprised of a pulse transmitter mounted on the meter, a display unit giving readouts of batch volume, flow rate, and a totalizer.