A fully programmable, current quantized, electronic coulometer totalizing 6-decades of charge (99,999.9 coulombs) and 6-decades of duration, (99 hours 59 minutes 59 seconds) for electrolysis. On the front panel: two 6-digit 7-segment-LED displays with relevant 12 BCD thumbwheels for monitoring and program setting of charge and duration respectively; charge and time resets and loading-command buttons; current polarity indication; “program-fulfilled”-cutout relay with buzzer. Zero-current detector excludes wrong totalizing due to process interruptions, e.g. electrode cleaning. This coulometer outputs charge and time BCD signals for slave indicators and data processing. It is specially meant for organic electrochemical synthesis. Electrolysis current range: 0.005A to 1.00A of either polarity.