FOD Displacement Sensor
The FOD is an absolute-position fibre optic linear displacement transducer used for long-term structural deformation monitoring or surface mounting across joints and cracks. Its fibre optic design gives it complete immunity to EMI, RFI and lightning, with no risk of current leakage or ignition.
- Range
- 20 mm standard stroke (40, 100, 120 mm special versions)
- Accuracy
- 0.1% F.S.
- Resolution
- 0.002 mm
Overview
In detail
How it works
The FOD is the fibre optic equivalent of a Linear Variable Differential Transformer (LVDT), providing highly precise absolute position and displacement readings. Because it is completely immune to EMI and RFI and carries no risk of current leakage or ignition, it can be located up to 5 km away from its signal conditioner.
Applications
The FOD is ideal for long-term structural deformation monitoring or for surface mounting across joints and cracks.
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Specifications
Technical specifications
- Range
- 20 mm standard stroke (40, 100, 120 mm special versions)
- Accuracy
- 0.1% F.S.
- Resolution
- 0.002 mm
- Operating temperature
- -40 to +80°C
- Cable
- CFO-3STD, 3 mm diameter, ST or SC connector
- Housing
- Aluminium or stainless steel (waterproof)
- Dimensions
- 144 mm length × 19 mm outer diameter
Related
Often specified alongside
ESS Earth
Resistance Wire Extensometer RWE
- Application
- Underground hard rock and coal mine displacement monitoring
- Monitoring points
- Pillars, stope walls, roof
Geosystems
JM Series Vibrating Wire Jointmeter
- Range
- 25, 50, 100, 150, 200, 250, 300 mm (200/250/300 mm not available for JM-E)
- Accuracy
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