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Vessel Systems Monitor VSM 422
Cat. No. BLU-1801
Weight 2 lbs

The Vessel Systems Monitor VSM 422 is a comprehensive monitor for four boat systems in one compact package. By monitoring DC (including battery state of charge), AC, tanks, and bilge, the VSM 422 alerts boaters to problems before theybecome 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 to help boaters avoid a dead battery at sea – a leading cause of a boat needing towing assistance. The VSM 422 also monitors temperature on the primary battery with the included Battery Temperature Sensor.

AC monitoring includes voltage, amperage, watts, and frequency. Tank monitoring for up to three tanks includes alarm functions for high and low levels, and bilge monitoring includes pump active, cycle count, and duration. With its user-friendly interface, intuitive display modes, and versatile case design, the Vessel Systems Monitor VSM 422 is an excellent replacement for four separate systems monitors.
  • 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)

Packaging Includes:
head unit, surface mount bezel, surface mount gasket, DC Current Shunt 8255, AC Current Transformer 8256, Battery Temperature Sensor 1820, connectors and mounting screws

DC Specifications
Nominal System Voltage     12 or 24V
Operating Voltage               8.5–33.0V
Minimum Current Draw       35mA @ 12V, backlight off
                                           18.8mA @ 24V, backlight off
Voltage Accuracy                +/- 0.5%
Current Range                      0-500A
Current Accuracy                 +/- 1.0%

AC Specifications
Nominal System Voltage      120V @ 60Hz, North America
                                            230V @ 50Hz, Typical of Europe
Operating Voltage                 0-300V
Voltage Accuracy (RMS)      +/- 0.5%
Current Range                       0-150A
Current Accuracy (RMS)       +/- 2.0%
Frequency                              40-90Hz

C E Marked for E60945 electromagnetic interference
Unit face is IP67–protected against immersion up to 1 meter for 30 minutes
VSM 422 Surface Mount Gasket creates a waterproof seal on unit face

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