Lascar dpm 500 series 35 digit lcd panel meters lascar dpm 500s this panel mounting meter is a compact unit that has a dil 40 ic format that allows the meter to plug directly into a dil socket or can be mounted using the snap in bezel this single rail version has a built in negative rail generator enabling the meter to measure a signal referenced to its own power supply 0v lascar dpm 500s 35 digit lcd voltmeter