FBG Osmotic Pressure Sensor

The FBG pore water pressure sensor measures pore water pressure based on the fiber Bragg grating principle, and is suitable for installation at geotechnical engineering monitoring points such as tunnels, slopes, foundation pits, and roadbeds. The product adopts integrated packaging, has temperature resistance, corrosion resistance, and aging resistance, its signal transmission is not affected by electromagnetic interference, and it supports quasi-distributed networking, making it easy to connect to online monitoring systems. Confirmed parameters include resolution 0.1% F.S., accuracy 1% F.S., pressure range 0.3–6 MPa (larger ranges customizable), center wavelength 1510–1590 nm, standard single-mode fiber, dimensions φ31 mm×127 mm. The pressure range can be customized according to the project. For price, packaging, MOQ, delivery time, and certification information, please contact us to confirm; we will assist with selection and quotation based on your monitoring points and quantity.

• Fiber Bragg grating principle, signal transmission is not affected by electromagnetic interference, suitable for complex electromagnetic environments such as substations and tunnels
• Resolution 0.1% F.S., accuracy 1% F.S., meeting the reading requirements for geotechnical engineering seepage pressure monitoring
• Pressure range 0.3–6 MPa, and larger ranges can be customized according to the project
• Integrated packaging, temperature resistance, corrosion resistance, and aging resistance, suitable for long-term buried monitoring
• Supports quasi-distributed transmission, and can be connected to an online monitoring system to achieve centralized collection at multiple points
• Fast installation, reusable, convenient for on-site deployment and later maintenance

Applications

• Monitoring changes in pore water pressure of surrounding rock in tunnel engineering, assisting in judging seepage states during construction and operation periods
• Online seepage pressure monitoring for slope engineering, providing continuous data for stability assessment
• Pore water pressure monitoring inside and outside foundation pit engineering, used in conjunction with dewatering and excavation procedures
• Subgrade seepage pressure monitoring, to understand moisture and pressure changes inside the subgrade
• Geotechnical engineering online monitoring system integration, serving as a seepage pressure measurement point in a fiber Bragg grating sensing network

FAQ

In which engineering scenarios are FBG seepage pressure sensors suitable for use?

It is mainly used for online monitoring of pore water pressure and seepage pressure in geotechnical engineering, with typical scenarios including tunnels, slopes, foundation pits, roadbeds, etc. It can also serve as a seepage pressure measurement point in a fiber Bragg grating sensing network and be integrated into an online monitoring system. If your project falls under the above scenarios, you are welcome to contact us to confirm the model selection.

What are the range and accuracy of this sensor?

The pressure range has been confirmed as 0.3–6 MPa, and a larger range can be customized according to the project; the accuracy is 1% F.S., and the resolution is 0.1% F.S. If your monitoring range exceeds the standard range, please contact us to confirm a customized solution.

Why is the FBG seepage pressure sensor suitable for occasions with complex electromagnetic environments?

It is based on the fiber Bragg grating principle, and the signal is transmitted through ordinary single-mode fiber, so it is not subject to electromagnetic interference. Therefore, it is suitable for geotechnical engineering monitoring occasions with complex electromagnetic environments, such as substations and tunnels.

What information needs to be confirmed before procurement?

It is recommended to confirm the monitoring scenario, required range, quantity, and project location. For price, packaging, MOQ, delivery time, and certification information, please contact us to confirm, and we will assist with model selection and quotation based on your project requirements.

Can the product be reused? Is installation convenient?

The product adopts integrated packaging, allows quick installation, and can be reused. For specific installation methods and layout suggestions, you are welcome to contact us, and we will assist in confirming them based on your on-site conditions.