FBG Earth Pressure Sensor

This sensor is based on fiber Bragg grating (FBG) sensing technology, converting soil pressure changes into wavelength signals, and works with demodulation equipment to read data. The product adopts an integrated package with flexible installation methods; it can be embedded in soil or installed on structural surfaces, making it suitable for long-term monitoring in scenarios such as slopes, foundation pits, tunnels, and roadbeds. Confirmed parameters include: resolution 0.3% F.S., accuracy 0.1% F.S., pressure range 0.3–10 MPa with support for custom larger ranges, center wavelength 1510–1590 nm, uses standard single-mode fiber, dimensions Φ150 mm×23 mm and customizable. Fiber optic sensing itself is immune to electromagnetic interference and also has inherent explosion-proof characteristics, making it relatively durable in humid, temperature-varying, and corrosive environments. Before purchasing, it is recommended to confirm the range, dimensions, installation method, and supporting demodulation equipment; you are welcome to contact us for assistance with selection.

• Fiber Bragg grating principle, outputs wavelength signals, immune to electromagnetic interference, suitable for complex electromagnetic environments such as substations and tunnels
• Inherently explosion-proof, can operate without power supply, suitable for flammable and explosive or long-term unattended monitoring points
• Resolution 0.3% F.S., accuracy 0.1% F.S., capable of capturing subtle changes in soil pressure
• Pressure range 0.3–10 MPa, and custom larger ranges are available according to project requirements
• Integrated package, temperature-resistant, corrosion-resistant, aging-resistant, supports embedded or surface installation
• Dimensions Φ150 mm×23 mm, customizable dimensions, easy to match different installation spaces

Applications

• Slope engineering safety monitoring: deploy sensors inside or on the surface of the slope body to track changes in earth pressure and assist in judging slope stability
• Foundation pit excavation monitoring: installed on the retaining structure or inside the soil body to record the trend of earth pressure changes during the excavation process
• Tunnels and underground engineering: embedded behind the lining or in the surrounding soil body to collect earth pressure data over the long term
• Roadbed and foundation monitoring: used for earth pressure observation of highway and railway roadbeds and foundations, supporting settlement and stability analysis
• Scientific research and teaching experiments: measure soil pressure distribution in geotechnical model tests, used in conjunction with fiber optic demodulation equipment

FAQ

In which engineering projects are FBG earth pressure sensors suitable for use?

It is mainly used for soil pressure monitoring in geotechnical engineering, including scenarios such as slopes, foundation pits, tunnels, and roadbeds, and can also be used for geotechnical model tests in scientific research and teaching. It can be embedded in soil or surface-mounted.

Can the range and size of this sensor be customized?

Yes. The standard pressure range is 0.3–10 MPa, and larger ranges can be customized; the standard size is Φ150 mm×23 mm, and it can also be customized according to project requirements. Please contact us to confirm the specific configuration.

Does the FBG soil pressure sensor require power supply?

It works based on the fiber Bragg grating principle and is a passive sensor, so no power supply is required on site, and it also has natural explosion-proof characteristics, making it suitable for long-term deployment in complex environments.

What information needs to be confirmed before procurement?

It is recommended to confirm the monitoring scenario, required range, size requirements, installation method, quantity, and whether supporting demodulation equipment is needed. After providing this information, we will assist in confirming the configuration and provide a quotation.

What are the price, delivery time, and minimum order quantity?

Price, delivery time, and minimum order quantity vary depending on the range, size, and quantity; please contact us to confirm.