Sealed magnetic fiber optic sensor for monitoring manholes, handholes, cabinet doors, junction boxes, and a host of other applications.

• 25km range with no power required on the perimeter
• Immune to EMI and RFI transmissions and lightening
• Rugged and Sealed for use in wet and harsh environments
• Tamper resistant as disturbing the fiber triggers an alarm and the location of the breach may be detected with the LightLOC Network Based Monitoring System

Standard limit switch functioning on copper wire.

• Limited range due to the resistance in the copper wire used to connect the switch to a monitoring point (usually less than 1,500 feet)
• Susceptible to electrical disturbances in the environment (lightening etc)
• Subject to corrosion due to fertilizer and salt (for melting snow)
• Switch may be easily defeated by cutting the wire or splicing around it