3100 power board
6B3105030
(10*12*8;NW:300g)                                    

Flow detection circuit is fuel dispenser display board shown in figure 1.Light code disc measurement device for the flow sensor, the casing channel switch fixed to the controller, spins disc (slotted) via flexible shaft directly with the gauge on the tanker shaft connection again.When refueling tanker, rotating disk by meter shaft drives the rotation, triode BG1 output pulse sequence, the hair oil on the number of liters proportionally converted to pulse count, after this, the 74 ls14 schmidt circuit, pulse shaping into single chip microcomputer internal counter, can be measured by 3100 power board counting value amount.