Simpson Electric M13500240 Digital Panel Meter

The Simpson Electric M13500240 Digital Panel Meter is a compact, panel-mount 3 1/2‑digit DC voltmeter from Simpson’s Mini M135/M145 family. It features a red backlit LCD with a negative‑image display for readability in varied lighting and snaps into a panel without separate mounting hardware. The 3 1/2‑digit variant (M135) offers accuracy of ±(0.1% of reading + 1 count), while the higher‑resolution 4 1/2‑digit M145 models provide ±(0.04% of reading + 1 count). Power options for the family include +5 V, +9 V, or ±5 V supplies, depending on the version. Connections use standard screw terminals for straightforward wiring. Common applications include DC voltage monitoring in control panels, instrumentation, and compact equipment where a small, easy‑to‑read digital readout is required. This meter integrates with Simpson’s broader line of digital panel meters and accessories to deliver a cost‑efficient, panel‑friendly solution for real‑time DC level indication.