Home>Products

Stay Wire Displacement Sensor

The JMDL-32XXAT Smart Single-Point Bedrock Displacement Meter extends Kingmach Stay Wire Displacement Sensor into embedded rock and foundation monitoring. It is designed for tunnel rock mass deformation, dam bedrock deformation, slope sliding, and foundation pit face movement. The assembly includes a flange, electrical displacement sensor, tie rod, anchor head, and PVC pipe, forming a practical embedded instrument for single-depth displacement. Listed models include 50 mm, 100 mm, and 200 mm ranges, each with 0.01 mm resolution. Product information lists displacement accuracy of 0.5%FS, temperature accuracy of plus or minus 0.5 degrees Celsius, and an operating temperature range from -30 degrees Celsius to +80 degrees Celsius. This product is useful where the monitoring point needs to be anchored into a known layer rather than mounted only on a visible surface. In tunnels, dams, slopes, and deep excavations, that embedded layout helps link surface observations with movement inside the rock or foundation body. During project setup, the measuring point should be matched with the expected travel direction, available mounting space, cable route, and required acquisition interval. This prevents a short-range joint instrument from being used on a long-travel point, or an exposed sensor from being placed where an embedded anchor is needed. It also helps the monitoring team set a baseline that can be defended during acceptance and later maintenance review.

Application of  Stay Wire Displacement Sensor

Application of Stay Wire Displacement Sensor

In tunnel engineering, Stay Wire Displacement Sensor help monitor surrounding rock deformation, lining movement, tunnel portal displacement, clearance change, and crack opening after excavation. Tunnel sites often have wet air, dust, restricted access, and changing support stages, so the instrument must hold a stable baseline through construction disturbance. Kingmach JMDL-31XXAT multipoint displacement meters use drilling and grouting with anchor heads at different depths, allowing engineers to compare the movement of separate rock layers. The series lists 50 mm, 100 mm, and 200 mm ranges with 0.01 mm resolution. JMDL-32XXAT single-point bedrock meters can be embedded with a flange, tie rod, anchor head, and PVC pipe assembly. JMLS-22XXADT wire rope sensors can watch longer displacement paths or tunnel wall clearances. These readings help site teams decide whether deformation is responding to excavation sequence, groundwater, lining timing, nearby blasting, or long-term ground pressure. During operation, the monitoring team should keep the baseline, temperature, inspection notes, and nearby sensor behavior in the same review file. This makes it easier to tell whether a movement trend comes from normal service, a repair event, changing load, water influence, or developing structural risk. Clear records also help owners decide when a field inspection is needed instead of waiting for visible damage.

The future of Stay Wire Displacement Sensor

The future of Stay Wire Displacement Sensor

The future of Stay Wire Displacement Sensor will include more mixed measurement packages rather than single-sensor orders. A slope package may combine GNSS, multipoint displacement, crack gauges, pore pressure, rainfall, and tilt. A bridge package may combine differential displacement, strain gauges, load cells, accelerometers, temperature, and bearing inspection records. A tunnel package may combine multipoint displacement, convergence, lining strain, water pressure, and vibration. Kingmach already provides a broad product ecosystem across displacement, strain, load, settlement, tilt, environmental monitoring, acquisition equipment, cables, and software. The next step is project-specific packaging where the displacement instrument is selected together with its data logger, cable, cabinet, communication route, warning logic, and maintenance plan. That approach reduces mismatched hardware and makes the monitoring system easier to operate after handover. It also helps procurement teams compare complete monitoring functions instead of comparing sensor names alone. For complex infrastructure, the package should define which movement point answers which engineering question before hardware is ordered.

Care & Maintenance of Stay Wire Displacement Sensor

Care & Maintenance of Stay Wire Displacement Sensor

For Stay Wire Displacement Sensor installed at cracks, joints, and expansion joints, maintenance should focus on bracket stability, rod alignment, cable protection, and baseline traceability. Kingmach JMDL-22XXAT crack gauges may use different measuring rods and universal bases, so the mounting points must remain firm while the structure moves naturally. Avoid placing rods where they can be hit by workers, tools, vehicles, concrete debris, or repair materials. During inspections, check whether the crack edge has spalled, whether the base has loosened, whether water has entered the connector, and whether the displayed movement agrees with nearby observations. Because the product can store up to 600 measurement results, compare field readings with stored records before resetting values. If temperature versions are used, keep temperature data with displacement data so seasonal opening and structural movement are not confused. Keep the installation photo, point number, zero value, and expected movement direction with the commissioning record for later review. If a reading changes after maintenance work, inspect the base, anchor, cable, and cabinet before assuming the structure itself has moved.

Kingmach Stay Wire Displacement Sensor

Stay Wire Displacement Sensor are often the quiet part of a monitoring system, but they decide whether deformation is understood as a trend or discovered as damage. Kingmach displacement products can be placed at expansion joints, cracks, foundation pits, slope faces, tunnel surrounding rock, dam bedrock, railway subgrades, high-formwork supports, and equipment stroke positions. Many models support digital transmission, anti-interference performance, waterproof sealing, and connection to automatic acquisition systems. The JMDL-21XXAT general-purpose meter records relative displacement and expansion joint movement with 50 mm or 100 mm ranges and 0.01 mm resolution. The JMDL-31XXAT multipoint meter can be installed by drilling and grouting, with anchor heads at different depths. When readings are reviewed with settlement, tilt, rainfall, pore pressure, or construction logs, engineers can see whether movement is seasonal, load-related, excavation-driven, or moving toward a control limit. The point should be named on the drawing, linked with its cable route, and checked against the expected movement direction before the first automatic reading is accepted. For daily review, the reading should be compared with nearby points, recent weather, site operations, and any loading event that could explain the movement.

FAQ

  • Q: What are Stay Wire Displacement Sensor used for?
    A: They measure movement such as relative displacement, crack width, expansion joint travel, bedrock deformation, rock layer movement, geogrid deformation, formwork settlement, and equipment stroke.

    Q: Which Kingmach models belong to this category?
    A: Common models include JMDL-21XXAT, JMDL-22XXAT, JMDL-24XXAT, JMDL-31XXAT, JMDL-32XXAT, JMDL-49XXAT, JMDL-52XXADT, JMCW-21XXADT, and JMLS-22XXADT.

    Q: What range should be selected first?
    A: Start from the expected movement. Short joint monitoring may need 20 mm to 100 mm, while draw-wire or equipment travel may require 500 mm to 2000 mm.

    Q: Can these products support remote monitoring?
    A: Yes. Several Kingmach models support digital transmission, RS485 communication, automatic acquisition, integrated testers, or unattended monitoring systems.

    Q: Why is the baseline reading important?
    A: All later movement is compared against the starting point. The baseline should be recorded after the sensor, bracket, anchor, cable, and structure are stable.

Reviews

David Wilson

We purchased displacement transducers and settlement sensors, and the quality exceeded our expectations. Easy installation and reliable performance.

James Thompson

The tiltmeters and accelerometers are very sensitive and provide precise data. Perfect for our structural health monitoring system.

Latest Inquiries

To protect the privacy of our buyers, only public service email domains like Gmail, Yahoo, and MSN will be displayed. Additionally, only a limited portion of the inquiry content will be shown.

Mia***@gmail.comNetherlands

Dear team, we are interested in your readouts & data loggers compatible with multiple sensors. Do yo...

Ava***@gmail.comAustralia

Hi, I am looking for reliable tiltmeters and accelerometers for structural health monitoring. Please...

Not finding what you're looking for?
Contact our consultants for more available products.

Request A Quote Now

GET IN TOUCH

If you are interested in our products or want to become our partner.

Please leave your contact information, our team will contact you as soon as possible.

Contact Us Now
Copyright © Kingmach Measurement & Monitoring Technology Co., Ltd.
get a quote
Your Name:
E-mail:*
Company:
Phone/WhatsApp:
Content: