Includes the features of the M-2A:

• Microprocessor-controlled
• Low profile, water resistant design
• Two-channel monitoring capability
• Plug-in sensors (second sensor optional)
• Fault light alarm
• Fault lights to indicate a malfunction in either the module or one of the sensors
• "press to test" button for each channel indicates either an OK or Danger condition
• Alarm Silence button deactivates the alarm horn
• calibrated to eliminate most nuisance alarms while allowing enough time to take action

The MB-2 adds automatic bilge blower control. T