Static And Dynamic Micro Pore Water Pressure Sensor DSP-I

Piezoresistive type           Featuring a flexible split structure

To meet the demand for high-precision, high-sensitivity, and accurate pore water pressure measurement under multi-field coupling and complex soil conditions, while accommodating special working conditions such as static and dynamic centrifuge tests, the miniaturization design of pore water pressure sensors is often subject to extremely stringent requirements. Meanwhile, to capture the high-frequency and transient variations of pore water pressure without disturbing the flow field, the sensor must possess excellent dynamic response performance.

In response to these requirements, the DSP-I miniature dynamic pore water pressure sensor has been developed. This sensor adopts advanced domestic silicon-silicon bonding technology and high-performance MEMS piezoresistive sensing elements, combined with internationally leading miniaturized fabrication and packaging processes. It features a small effective size, fine wire diameter, compact structure, and high robustness, while exhibiting excellent static/dynamic response performance and long-term stability. Particularly importantly, this series of piezoresistive pore water pressure sensors adopts an optimized split structure with threaded connections. This design not only facilitates the saturation and cleaning of the porous stone but also allows flexible selection of porous stones according to different soil types. In addition, it enhances the fault detection capability of the sensor and improves the utilization rate of the core components.

Typical features

• Miniaturized, with a minimum diameter of 10mm and length of 13.5mm;

• High frequency response, with a natural frequency up to 300kHz;

• Wide pressure measurement range: -100kPa~1.2MPa;

• Wide operating temperature range: -40~+125°C;

• Suitable for various static/dynamic pore pressures and gas/liquid fluid media;

• Excellent corrosion resistance, with an all-stainless steel housing;

• High flexibility, featuring a split structure;

• The porous stonecan be cleaned and saturated independently;

• The material and pore size of the porous stoneare selectable;

• High reliability, high precision, and high stability;

• Resistance to strong/weak electromagnetic interference, high centrifugal force, and impact interference;

• Provide a complete factory report, with a 1-year warranty period;

Typical applications

• Static centrifugal model test

• Dynamic centrifugal model test

• Conventional shaking table model test

• Unit model test

• Clay matrix suction test

• Earthquake  field, underwater explosion test, etc.

• Monitoring of marine structures and downhole stations