Product Description: The series HFH ls a Solenoid driven metering with the concept of the user- friendly design. Our technology makes the pump with reliable feeding performance. The feeding capacity can be adjusted via stroke length and stroke frequency to obtain a satisfied turn-down ratio. • The wide voltage circuit design 1ø100V ~ 240V +/- 10% . It makes the pump can be used everywhere. • The Solenoid is Safe with a thermostat always making the pump run safely. • Easy to read LCD display, shows the operation status clearly. • IP65 Protection, water and dust proof design