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.
Proximity Sensors can be provided on almost any Yamada pump. They are used to send a signal every time the pump completes a cycle. This signal can then be used to count cycles for preventative maintenance. It can also be used to monitor flow rate.
When used for one of these purposes the signal is usually sent to a basic digital counter that has no control capability. In addition to giving a totalized readout in cycles it will also be able to totalize in any engineered unit, such as gallons, cubic feet, cubic meters, liters, etc.
Most basic counters will also be able to give a readout in GPM, L/M, or other flow rates. When using a proximity sensor with a PLC and a solenoid in the air line you can also perform batch metering. In other words, you can pump to a predetermined amount and have the pump shut off at that predetermined amount.
The proximity sensor comes in two configurations. Please consult Yamada America for more information about proximity sensors and their use.
-P1 ISA 10-30VDC 3 wire unit
-P2 ISA 24-240VAC 2 wire unit