Blue Sea Systems AC Digital Multi-Function Meter with Alarm

The Blue Sea Systems AC Digital Multi-Function Meter consolidates four separate AC measurements — amperage, voltage, power, and frequency — into one digital display, replacing what would otherwise take several individual analog gauges to show.

Key features

• Displays amperage from 0-150A
• Displays voltage from 80-270V
• Displays power from 0-35 kilowatts
• Displays frequency from 40-90 Hz
• High and low voltage audio and visual alarms
• Sleep mode reduces power consumption when not actively being read

Wiring requires connections to terminals #1 and #3 for all functions, with terminals #4 and #5 used specifically for this model's expanded feature set. If wiring into a 240V AC system, terminal #1 must be fused with a 0.5A fuse in its own holder — this is a specific, important detail from the manufacturer's installation manual, not optional even though it's easy to overlook during a busy panel wiring job.

This meter suits a boat's main AC panel where at-a-glance access to voltage, current, power draw, and frequency all matter — confirming shore power or a generator is delivering clean, stable power at the correct frequency before switching sensitive electronics on. The sleep mode helps keep standby power draw low when the display isn't actively needed, without sacrificing the ability to check it instantly when it is.

Confirm your total AC load stays within the meter's 150A display range before wiring it into the panel, since a load exceeding that range won't display accurately even though the underlying circuit itself may be sized for a larger load overall.