An LED panel or dash display from Filter Minder is capable of reading sensor output voltage to help determine filter restriction or other conditions being monitored by a sensor. As the unit reads the output of a 0 to 5 V dc variable output sensor monitoring such conditions as filter restriction, oil pressure, fuel pressure, air pressure, water pressure, liquid levels, or temperature and the voltage increases, a light bar progressively illuminates until reaching maximum condition or full illumination. The unit features memory immune to power interruption, and the final LED flashes when the maximum condition is reached. Operating voltage is 6 to 30 V dc, and the display can be adjusted to off, dim, and bright settings. Units are available in square and round versions and will mount on or behind dash or panel surfaces.