High Precision EJ-BM21 500A Shunt Coulometer SMART Battery Monitor
Ultra-accurate 500A shunt sensor with ±0.1% precision for real-time battery performance tracking. Heavy-duty brass construction ensures durability under extreme loads. Integrated Bluetooth 4.0 enables wireless monitoring via smartphone—ideal for RVs, marine systems, and solar setups. OLED display shows voltage, current, and temperature simultaneously. Waterproof casing (IP65) withstands harsh environments. Zero power consumption when idle—perfect for long-term energy storage management. Compatible with lithium/lead-acid batteries. Global wholesale pricing with bulk discounts for commercial buyers. Ships worldwide with guaranteed lowest rates.