Maretron SIM100 Switch Indicator ModuleSIM100 Switch Indicator Module Maretron's Switch Indicator Module monitors switch closure devices including, but not limited to, safety equipment (heat, smoke, carbon monoxide, explosive vapor detectors), security systems (motion, vibration, glass break, door and port hole magnetic switches), and vessel monitoring equipment (valve closed open, high water bilge). The SIM100 continually monitors these switch closure devices and broadcasts information of