PN 1800 - Vessel Systems Monitor VSM 422
- 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)
| DC Specifications |
| Nominal DC Voltage |
12 or 24 Volts |
| Operating Voltage |
8.5–33.0 Volts |
| Minimum Current Draw |
35mA@9.5 Volts, 18.8mA@24 Volts |
| Voltage Accuracy |
+/- 0.5% |
| Current Range |
0–500 Amps |
| Current Accuracy |
+/- 1.0% |
| AC Specifications |
| Nominal Voltage |
120 Volts@60 Hz, 230 Volts@50 Hz |
| Operating Voltage |
0–300 Volts |
| Voltage Accuracy (RMS) |
+/- 0.5% |
| Current Range |
0–150 Amps |
| Current Accuracy (RMS) |
+/- 2.0% |
| Frequency |
40–90 Hz |
| Agency Standards |
Surface mount gasket creates an IP67 seal on unit face—temporary immersion for 30 minutes |
Includes These Items
DC Current Shunt (8255)
AC Current Transformer (8256)Battery Temperature Sensor (1820)
Mounting Options and Display Modes

| PN |
Description |
Retail Packaged |
Width in (mm) |
Height in (mm) |
Depth in (mm) |
| 1800 |
Vessel Systems Monitor |
Retail Packaged in Box |
4.50 (102.87) |
3.00 (76.20) |
2.00 (50.87) |
| 1801 |
Vessel Systems Monitor |
Retail Packaged in Clam |
4.50 (102.87) |
3.00 (76.20) |
2.00 (50.87) |