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Vibrating Wire Strain Gauges for Bridge, Tunnel & Dam Monitoring: Complete Selection Guide
The global construction industry is experiencing a massive surge in large-scale infrastr...
Smart Single-Point Bedrock Displacement Meter for Critical Monitoring
Smart Single-Point /Bedrock Displacement Meter
On a tunnel project, a few millimeters of unexpected rock movement can throw schedules into chaos. Engineers need to catch these shifts before they become visible cracks. The Smart Single-Point Bedrock Displacement Meter from Kingmach gives you that early signal. It measures displacement at a single anchor point in bedrock, so you can track deformation directly at the source. Unlike scanning instruments that average over a large area, this meter focuses on one critical location—ideal for fault zones, dam abutments, or high-stress pillars. Kingmach has been building geotechnical instruments long enough to know that field conditions rarely match the brochure. That is why we offer customization on cable length, output signals, and mounting hardware. With a global support network, you are not left alone after the shipment. The meter is designed to hold up in wet, dusty, or high-vibration environments, and the smart electronics simplify datalogger integration. When you need a reliable baseline on rock movement, this tool fits right into your monitoring routine.
Technical Detail
Configured around process stability, mold life, and long-term uptime.
Kingmach manufactures geotechnical instruments for a wide range of monitoring needs, and the Smart Single-Point Bedrock Displacement Meter is a focused tool for deformation measurement. It is built around a precision sensor that detects movements as small as fractions of a millimeter at a single anchor point. That direct mechanical linkage—from anchor to transducer—avoids errors common with indirect methods. The smart module handles signal conditioning and can output industry-standard formats like 4-20mA or RS485, which means it drops into existing SCADA or automatic monitoring systems without extra converters. We have seen these units deployed in hydropower caverns, open-pit mine slopes, and urban deep excavations. The common thread is a need to watch a specific rock mass that drives overall stability. Because every site has its own wiring distances, borehole diameters, and access constraints, we work with buyers to adjust the gauge length, housing material, and connector options. Kingmach’s in-house testing includes temperature cycling and long-term drift checks to ensure the meter does not introduce its own noise over months of unattended operation. Technical support after delivery covers installation guidance, troubleshooting, and firmware updates where applicable. This is not a generic displacement sensor; it is an instrument tuned for bedrock monitoring, where data continuity matters more than a flashy spec sheet.
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Smart Flexible Displacement Meter JMDL-24XXAT
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View DetailsFAQ
Common technical questions
Where do you typically install a single-point displacement meter, and what makes it “smart”?
Boreholes drilled into rock—tunnel crown, sidewall, or dam foundation—are the usual spots. The meter anchors at the bottom, with the transducer at the collar, measuring movement between the anchor and the surface. “Smart” means the built-in electronics handle signal processing: temperature compensation, linearization, and digital output. Instead of a bare millivolt signal that needs careful calibration on site, you get clean engineering units over RS485 or a conditioned current loop.
How does this differ from a multi-point borehole extensometer?
A multi-point extensometer tracks displacement at several depths in one borehole, which is useful for profiling deformation zones. The single-point meter zeroes in on one depth, which is often the most critical discontinuity or the base of an unstable block. It is simpler to install, lower cost per point, and you can place multiple single-point meters in a pattern to triangulate movements without complexity.
What kind of output or data logger connection does it support?
Common outputs are 4-20mA, RS485 (Modbus), and sometimes 0-5V on request. The smart module lets you set ID and baud rate for daisy-chaining. Most of our clients connect it to a Campbell Scientific datalogger or a wireless node, but we can match pinouts for your existing system.
Can I get a longer anchor rod or a different transducer range?
Yes, customization is standard for Kingmach. Typical range options go from 25 mm up to 200 mm full scale, but we can discuss your target displacement. The anchor rod length can be extended to match borehole depth—just need to know the expected rock conditions so the rod material and couplers will handle the anchor pull.
How do I maintain accuracy over a multi-year monitoring program?
The sensor is sealed against moisture and we pretension the anchor to reduce bedding-in drift. We recommend a periodic zero-check using a known reference, and our support team can guide you through remote diagnostics if you are logging data regularly. Long-term drift is kept under 0.1% full scale per year under normal temperature swings, based on our factory aging tests.
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