Electromagnetic metering pump works using electromagnetic (through the coil is energized to generate a magnetic field) after the introduction of the piston, the diaphragm connected to the piston head will pump the liquid medicine in the cavity, and liquid medicine pushed out; when the signal When it is stopped, the spring pushes back the piston and the diaphragm. This action causes the pump head to form a vacuum inside, and at the same time, the liquid medicine is sucked into the pump head cavity and is pushed out by the next push. Flow range: 0 to 100 liters / hour, back pressure: 0 ~ 20Bar, precision: ± 2%, corrosion resistance, suitable for small flow and the need to measure the application conditions.