Omega Engineering Metering Pumps Power supplies for stepper drives, sensors, transducers, strain gages, and general purpose use. Linear regulated and switching supplies, adjustable voltages and fixed voltages. 100:1 High Temperature Diaphragm Metering Pump Pump Accessories Pump/Tank Metering System, EOL 100:1 NEMA 4X Diaphragm Metering Pump w/ Alarm output