Waterproof 0.36 Inch DC Voltmeter

This digital voltmeter features a compact 0.36-inch yellow LED display with automatic decimal point shifting, designed for clear visibility in varied lighting conditions. Constructed from sealed plastic with a folding waterproof housing, it offers reliable protection against moisture and dust. The unit operates on a wide DC input range of 4–30V, draws less than 20mA, and delivers voltage readings from 0–100V with ±3% measurement accuracy at a sampling rate of 200ms per reading. It weighs just 13g (0.5oz), mounts via a 23×14.5mm cutout, and functions reliably within -10°C to 65°C ambient temperature and 10–80% non-condensing humidity. The built-in reverse polarity protection safeguards internal circuitry during incorrect wiring — a critical reliability feature often missing in entry-level meters. Its three-wire connection (V+, V−, and signal ground) enables stable, noise-resistant measurement without requiring a shared power ground with the measured circuit — ideal for automotive, marine, or solar battery monitoring where ground loops can distort readings. Designed for real-world use: the foldable housing simplifies panel installation and service access, while the IP-rated sealed shell ensures consistent performance in damp engine bays, outdoor battery banks, or workshop environments where splashes or condensation may occur.