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Blue Sea Systems Vessel Systems Monitor 1801

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Blue Sea Systems Vessel Systems Monitor VSM 422 - Clam - 1801

Product Condition: NEW

Availability: In stock


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The Vessel Systems Monitor VSM 422 performs comprehensive monitoring of four boat systems in one compact meter, saving space and money. By monitoring DC (including battery state of charge), AC, tanks, and bilge pump, the VSM 422 alerts boaters to problems before they become emergencies.

The ability to monitor state of charge is critical to safe boating. By using a complex calculation of voltage, amperage, and amp-hours remaining, the VSM 422 is able to provide accurate and timely information about state of charge on the house battery to help boaters know when it's time to recharge.



  • Three intuitive display modes
  • Flexible case design offers three mounting options
  • Fully programmable legends and adjustable alarm functions can be customized to fit every boat
  • Included in retail packaging—head unit, surface mount bezel, surface mount gasket, DC Current Shunt 8255, AC Current Transformer 8256, Battery Temperature Sensor 1820, connectors, and mounting screws
  • Monitors DC systems—voltage, amperage, battery state of charge - amp hours remaining, time remaining, % charge, battery temperature (alarms for all values)
  • Monitors AC systems—voltage, amperage, watts, frequency (alarms for voltage, amperage, and frequency)
  • Monitors tank levels—fuel, water, waste, (alarms for high level waste, low level fuel, and water)
  • Monitors bilge—active, cycle count, and duration (alarms for cycles and duration)
  • CE Marked for E60945 electromagnetic interference
  • Unit face is IP67–protected against immersion up to 1 meter for 30 minutes (see inside back cover)
  • VSM 422 Surface Mount Gasket creates a waterproof seal on unit face



  • Blue Sea Systems Part No.: 1801
  • Nominal Voltage: 230V AC @ 50Hz, Typical of Europe • 120V AC @ 60Hz, North America • 12V DC • 24V DC
  • Operating Voltage: 0-300V AC • 8.5-33.0V DC
  • Current Accuracy: +/- 2.0% AC (RMS) • +/- 1.0% DC
  • Current Range: 0-150A AC • 0-500A DC
  • Frequency: 40-90Hz
  • Minimum Current Draw: 35mA @ 12V, backlight off • 18.8mA @ 24V, backlight off
  • Voltage Accuracy: +/- 0.5%
  • Weight: 4.00lb (1.81 kg)
  • Warranty: 3 years
  • Dimensions: See image #6

Additional Information

Product Condition NEW
upc 632085018016

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