Coal Mine Oil Pillow Type Borehole Stress Meter—Hydraulic Borehole Stress Sensor

The borehole stress meter is a mechanical measuring instrument placed in coal or rock mass boreholes to measure the internal relative stress. It adopts an oil pressure pillow structure, featuring a simple design, direct stress reading, no need for supporting instruments, oil bladder pressurization, and intuitive data observation.

Technical Specifications

1. Range: 0-40 MPa                    2. Measurement Accuracy: Grade 1.6

3. Suitable Borehole Diameter: Φ40～Φ45 mm 4. Installation Depth: 1～40m.