AC 0500V Voltage Regulator Display Digital Meter Voltmeter 3Wire D8521 1Pcs(7) A compact digital voltmeter designed to give clear, realtime AC voltage readings for systems operating from 0 to 500 volts. The D8521 is a 3wire digital display meter that makes monitoring AC voltage straightforward and reliable for a wide range of electrical applications. Key benefits Instant, easytoread voltage display: See current AC voltage at a glance, helping you detect overvoltage or undervoltage conditions quickly. Simple 3wire connection: Wiring separates measurement and power lines for stable readings and straightforward installation. Wide measurement range: Covers 0–500V AC to support many industrial, commercial, and hobby applications without multiple instruments. Singleunit option: Supplied as 1 piece (1Pcs) for direct replacement or individual panel installation. Key attributes Functionality: Digital voltmeter with visual display for AC voltage measurement. Measurement range: AC 0–500V as specified in the product title. Wiring: 3wire configuration for measurement and power separation. Model: D8521. Quantity: 1 piece (1Pcs(7) as listed). What this product solves Prevents equipment damage by providing continuous voltage awareness so corrective action can be taken before failures occur. Eliminates guesswork and manual measurements; delivers consistent electronic readings for routine monitoring. Offers a single, widerange instrument that reduces the need for multiple meters across different voltage systems. Typical applications Panel monitoring: Install in control panels to monitor mains or generator output voltage in industrial or commercial installations. Power equipment and maintenance: Use for onsite checks on generators, transformers, and distribution circuits during commissioning or troubleshooting. Workshop and test benches: Monitor AC supply voltage on test benches, stations, and hobbyist setups where a visible, reliable voltage readout is needed. Notes This listing is for the AC 0500V Voltage Regulator Display Digital Meter Voltmeter, model D8521, in a 3wire configuration, supplied as 1 piece. Follow standard electrical safety practices and local regulations when installing and operating the meter.