Lascar sp 100 3 5 digit led panel meter lascar sp 100 this 3 5 digit panel meter features a bright red led display that is easy to see in low light conditions a display blanking facility is provided for those applications requiring low power operation the meter has a negative rail generator that enables the meter to measure a signal referenced to its own power supply 0v the design of the housing and the seal give splashpoof protection lascar sp 100 3 5 digit led voltmeter