With the introduction of the XDP Series pumps we needed to use a proximity sensor other than the P1 and P2 sensors used on the rest of the Yamada product line, which sense the position of the C-Spool to count the cycles of the pump.

The P1X does not sense the air valve position. Rather, it senses the pressure shift that happens internally when the air valve in the pump shifts.

Please contact Yamada technical services for further information.