Asahi Keiki Co., Ltd. AP-301-12 Digital Panel Meter

Asahi Keiki Co., Ltd. AP-301-12 Digital Panel Meter is a compact 36 × 72 mm DIN‑size DC voltmeter that delivers a 3‑1/2‑digit red LED display (character height 14.2 mm) for easy reading in tight panel spaces. It is powered from a DC 5 V supply and measures DC voltages in the ±1.999 V range with a resolution of 1 mV, featuring a 100 MΩ input impedance and a maximum allowable input voltage of ±100 V. For panel mounting, the AP‑301 series uses a 36 × 72 mm cutout and supports panel thickness from 1.0 to 4.0 mm; the unit weighs about 35 g. A rear connector is provided for wiring to the control system, and the device relies on an independently developed LSI to maintain measurement accuracy. This model is ideal for compact instrumentation where high input impedance and precise, straightforward DC voltage readout are required on a small-format panel display.