How a Fuel Pump Counts Every Litre · Dicky Faisal Dramar

A 3D model of an SPBU fuel dispenser: the pump, the 4-piston meter, the pulser that turns every 0.01 L into an electrical pulse, the display, and the data an IoT monitoring gateway reads.

Behind the display, a positive-displacement meter turns once for every half litre, and a slotted pulser disc on its shaft sends 100 pulses per litre to the dispenser’s computer, which turns them into litres and rupiah. Set a Rp100,000 preset and the valve closes on exactly the 1,000th pulse: 10.00 L of Pertalite. Those pulses and the totaliser are what a station monitoring system reads, the same data behind the SPBU Digital Monitoring platform I worked on. Meter volume per turn and pulses per litre are illustrative estimates, marked with an asterisk; nothing here comes from Pertamina-internal documents.