42c3 75mV Positive/Negative Ammeter — Bidirectional DC Current Meter (75A to +75A, 75mV input) Why this meter matters Shows both charging and discharging current (positive and negative) so you can monitor the true direction and magnitude of DC current in real time. Uses the 75 mV industry standard input, making it compatible with common 75 mV reference outputs and current shunts for precise, lowvoltage measurement. Supports multiple common current ranges (50A, 100A and larger ±200A/±300A/±800A options) so it adapts to small and heavyduty DC systems without replacing your panel electronics. Key benefits Bidirectional measurement: clearly indicates positive (sourcing) and negative (sinking) currents for battery and system management. Standard 75 mV sensing: works with 75 mV outputs so you can pair it with widely available shunts and current transducers. Flexible range support: suitable for systems from midrange DC setups up to current installations when used with the corresponding 75 mV reference. Singleunit supply: packaged as 1 piece (1Pcs) for straightforward replacement or installs. Main attributes Model: 42c3 Input/reference: 75 mV Displayed measurement span: 75A to +75A when using the 75 mV fullscale reference Supported ranges: 50A DC, 100A, ±200A, ±300A, ±800A (as selectable/compatible ranges based on the 75 mV reference used) Directionality: Positive and Negative (bidirectional DC) Quantity: 1 piece Typical applications Battery systems and charge controllers: Monitor charging and discharging currents of battery banks to protect batteries and optimize charging profiles. Solar and renewable installations: Track array output and load flow to verify performance and detect faults or shading issues. DC motor drives, inverters and power supplies: Measure load currents, assist in troubleshooting, and help prevent overload conditions. Practical notes for installation and use This meter is designed for use with a 75 mV currentsensing reference. For higher current ranges listed (100A, ±200/300/800A), use the corresponding 75 mVrated shunt or sensing device so the meter reads correctly. Because the meter reads bidirectional current, observe polarity and wiring conventions to ensure positive/negative currents display as intended. Supplied as a single unit (1Pcs); check compatibility with your existing shunt or sensing method before installation. What you get One 42c3 bidirectional DC ammeter with 75 mV input capability, supporting the listed current ranges and intended for accurate positive/negative current monitoring in DC systems.