EFO Embeddable Fibre Optic Strain Sensor
The EFO is a 70 mm fibre optic strain sensor with a stainless steel body and two flanges, designed to be embedded directly in concrete. Its Fabry-Perot fibre optic design gives it intrinsic immunity to EMI, RFI and lightning damage, making it suited to long-term structural monitoring.
- Range
- ±1500 µε (other ranges available on request)
- Resolution
- 0.01% F.S.
- Operating temperature
- -40 to +55°C (cable dependent)
Overview
In detail
How it works
The EFO uses Fabry-Perot interferometry: a fibre optic strain gauge is bonded inside a small-diameter longitudinal hole in the centre of a stainless steel body. Two flanges at each end transfer concrete deformation into the sensor, and the design gives complete immunity to EMI, RFI and lightning-induced damage.
Installation
The EFO can be cast directly into wet concrete, or encapsulated in a concrete briquette that is then cast into the wet mix. It can also be set into hardened concrete by grouting the sensor, or its briquette, into a pre-drilled hole.
Reach out and say hi
Specifications
Technical specifications
- Range
- ±1500 µε (other ranges available on request)
- Resolution
- 0.01% F.S.
- Operating temperature
- -40 to +55°C (cable dependent)
- Dimensions
- 12.5 mm diameter × 70 mm length
- Cable
- CFF-UD3-1F, 2 m minimum length
- Connector
- ST
- Material
- Stainless steel body
Related
Often specified alongside
Geosystems
Vibrating Wire Strain Gauge SM-5
- Range
- 3000 µε
- Accuracy
- +/- 0.5% F.S.
- Temp
- −20 to +80°C
- Range
- 200 to 35,000 kPa (standard steps up to 35,000 kPa)
Ready to specify?
Add EFO Embeddable Fibre Optic Strain Sensor to your enquiry
Build a list, add your site notes, and an ESS engineer will quote the lot — cables, mounting and calibration included.
