Positive metering pumps provides electronic dosing pumps [ant pumps] which are available from 0 lph to 20 lph. These dosing pumps are very compact in size, lightweight and robust in structure. They are diaphragm type solenoid operated pumps. The diaphragm is made out of ptfe backed by hyphalon. The pumps can also be provided with automatic flow switches and level controllers. They are best suitable for applications in water and wastewater treatment, fuel metering, other chemical dosing in many process industries.