EN
ar
bg
hr
cs
da
nl
fi
fr
de
el
hi
it
ko
no
pl
pt
ro
ru
es
sv
tl
iw
id
lv
lt
sr
sk
sl
uk
vi
et
hu
th
tr
fa
ms
hy
ka
ur
bn
mn
ta
kk
uz
ku
magnetic displacement transducer
The JMDL-52XXADT Differential Displacement Meter is one of the higher precision Kingmach magnetic displacement transducer for structural joints and relative movement. It uses two coupled inductive coils. As the measuring rod moves, magnetic flux changes in the two coils are equal in magnitude and opposite in direction, and the difference is calculated to reduce environmental interference and thermal drift. Listed ranges are 20 mm, 50 mm, and 100 mm. The product provides 0.01 mm resolution, plus or minus 0.1%FS accuracy, RS485 digital output, DC 9V to 24V supply, power consumption below 0.4 W, long-term stability of plus or minus 0.1%FS per year, and an operating temperature range from -40 degrees Celsius to +80 degrees Celsius. Temperature drift is listed as 0.001 mm per degree Celsius. These specifications are useful for bridges, railways, hydropower structures, dams, and buildings where small relative movement needs to be measured across seasons and load changes. 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 magnetic displacement transducer
In tunnel engineering, magnetic displacement transducer 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 magnetic displacement transducer
Future magnetic displacement transducer will likely place more intelligence at the edge of the monitoring network. Instead of sending every reading to a platform without review, acquisition units can check whether a displacement jump is physically plausible, whether the temperature moved at the same time, and whether nearby channels changed in the same direction. Kingmach smart products already store measurement time, temperature for temperature versions, absolute displacement, relative displacement, and zero-point values on selected models. That local record can support early filtering and field diagnosis. For remote slopes, dams, subgrades, and tunnel portals, this matters because network access may be unstable and maintenance visits may be expensive. Edge checks can flag cable damage, zero drift, sudden water ingress, or installation movement before the data is accepted as structural deformation. The strongest systems will still depend on careful installation, because digital tools cannot correct a loose bracket, wrong range, or poorly recorded baseline. Clear reporting will make displacement monitoring more useful for non-specialist decision makers while preserving the detail engineers need.
Care & Maintenance of magnetic displacement transducer
For magnetic displacement transducer 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 magnetic displacement transducer
magnetic displacement transducer help engineers separate normal movement from structural risk. A bridge expansion joint may move with temperature, a tunnel lining may shift after excavation, and a slope may creep slowly before an alarm condition appears. Kingmach displacement products use several sensing routes, including inductive frequency modulation, differential coil measurement, magnetostrictive sensing, draw-wire conversion, and GNSS-based displacement tracking. Ranges can start at 20 mm for joint monitoring and extend to 2000 mm for draw-wire applications, while selected smart models store model data, serial numbers, calibration coefficients, zero values, temperature, and hundreds of measurement records. This makes the reading easier to trace during acceptance, maintenance, and later review. For a project buyer, the practical question is whether the movement point is exposed, embedded, multi-depth, long-distance, waterproof, or tied to geogrid. Kingmach provides different forms for those different site conditions. 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: Which magnetic displacement transducer are used for rock layers or bedrock?
A: JMDL-31XXAT multipoint meters are used for different surrounding rock layers, while JMDL-32XXAT single-point bedrock meters are used for tunnel rock mass, dam bedrock, slope, or foundation pit movement.
Q: How many points can the multipoint meter support?
A: The multipoint installation kit supports three to five monitoring points, with anchor heads fixed at different depths by drilling and grouting.
Q: What ranges are listed for these models?
A: Both JMDL-31XXAT and JMDL-32XXAT list 50 mm, 100 mm, and 200 mm models with 0.01 mm resolution.
Q: Why monitor several depths?
A: Different layers may move differently. Separating shallow and deep movement helps engineers judge whether the problem is surface creep, deeper rock slip, or overall mass movement.
Q: What records should be kept?
A: Keep drilling depth, anchor location, grouting date, channel name, zero value, cable route, and first stable reading.
Reviews
James Thompson
The tiltmeters and accelerometers are very sensitive and provide precise data. Perfect for our structural health monitoring system.
David Wilson
We purchased displacement transducers and settlement sensors, and the quality exceeded our expectations. Easy installation and reliable performance.
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.
Olivia***@gmail.comUnited States
Hello, we are currently sourcing high-precision strain gauges and load cells for a bridge monitoring...
Isabella***@gmail.comGermany
Hello, we are evaluating weir flow meters for a water management project. Please share accuracy deta...