BOREHOLE AND SUB-SURFACE INSTRUMENTS
- The 5TB houses an accelerometer that is designed for strong-motion borehole studies in cased holes with diameters of 99 to 203 mm.
- The triaxial analogue sensor can be combined with the DM24 borehole digitiser or a surface digitiser to build a fully networked, integrated borehole monitoring system.
The instrument is supplied with surge protection and a strain relief mechanism to isolate the sensors in the instrument from vibrations in the cable.
• Flat acceleration output from DC to 100 Hz (200 Hz option)
• 89 mm outer diameter
• Optional single-jaw lock for boreholes of 99 - 203 mm diameter
• Waterproof and durable with O-ring seals throughout
• Suitable for installation with sand backfill to minimise convection
• Dual output (high and low gain) and optional high/low pass filters
• Optional electronic compass module to determine the downhole attitude
• Remote DC offset zeroing
We can provide tripods, winches and other equipment designed specifically for borehole installations. To gain a fuller understanding of the key considerations for installing a borehole system, complete our borehole questionnaire at the bottom of this page.