Opti-Mag Sensor

Overview and Applications

Opti-Mag Sensors require no electrical power and instead utilize an internal magnetic plunger mechanism to attenuate optical fiber within a triggered sensor. The sensor is activated when a monitored object (e.g. valve, switch, cover, etc.) changes orientation, position or is removed from its location. Opti-Mag Sensors can be used in remote areas and/or flammable environments where sparks cannot be allowed. These sensors have no external moving components and do not require being in direct contact with the surface being monitored. Because sensor components are self-contained the sensors can be used in wet or corrosive environments where traditional sensors may fail.

Opti Mag

View/Download Opti-Mag Specification Sheet


The Opti-Mag Sensor System is used in applications where the orientation or operational status of an object or device must be monitored. Applications include:

  • Manhole covers that enable access to buildings and utility corridors
  • Industrial control devices such as valves, levers and switches
  • Doors, gates and other entry points
Icon bar

Opti-Mag Advantages

Non-Sparking - Opti-Mag sensors do not use electricity, so they are ideal for use in chemical plants, mining operations and other environments where combustible gasses or materials may be present.

Immunity to EMI - Opti-Mag sensors are immune to Electromagnetic Interference (EMI) and can be used in factory environments where copper wire and wireless sensors do not operate reliably.

Exceptional Monitoring Range - The long range monitoring capabilities of Opti-Mag Sensors make them well suited for pipeline, railroad and perimeter monitoring applications. Since the sensors do not use electricity, power does not need to be brought to remote sensing locations.

Typical Configurations

When connecting ten or more sensors in series, a 23dB dynamic range or the laser controller unit (part number OMS-CML) must be used.

NOTE: Each controller may be identified as a zone.

If “Connectorizing” fiber to sensors (2 each) at 1 dB loss per connector, ten sensors in series create 20dB loss, allowing a 3dB fiber loss. Using a “fusion splicer” for all splicing would enable serializing up to 20 sensors.

IMPORTANT: When installing fiber cable around corners, secure it loosely to avoid tight bends that will create additional attenuation.

Opti Mag