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
displacement sensors
For reinforced soil and geogrid work, Kingmach displacement sensors include the JMDL-24XXAT Smart Flexible Displacement Meter. This product is built around patented inductive flux frequency modulation technology and is designed for deformation or strain monitoring in geogrid materials used in reinforced soil and pile-net subgrade foundations. The measuring rod extension is flexible, so it can deform with the geogrid while both ends are clamped by mounting brackets for reliable strain transfer. Listed ranges are 30 mm and 50 mm, with 0.01 mm sensitivity and 0.5%FS accuracy. The non-contact measurement layout keeps the measuring rod and internal coil independent, reducing damage risk during installation and service. A 20-point curve fitting process supports nonlinear correction and accurate displacement output. Kingmach lists a designed service life of up to 30 years for this product, which fits long-term railway, roadbed, slope, and foundation monitoring where buried materials cannot be visually inspected after construction. For this model, the installation record should focus on geogrid layer position, bracket clamping force, fill sequence, compaction stage, cable exit route, and the first stable value after backfilling. Those details are different from crack monitoring because the sensor is working with buried reinforcement deformation rather than an exposed joint. During later review, the curve should be checked with settlement, traffic loading, rainfall, and earthwork records so engineers can understand how the reinforced soil body is behaving.
Application of displacement sensors
In bridge monitoring, displacement sensors are used at expansion joints, bearing zones, abutments, arch supports, deck gaps, and structural interfaces where relative movement affects service safety. The common pain point is that bridge movement may look normal during one inspection but reveal risk when compared over temperature cycles, traffic load, and maintenance events. Kingmach JMDL-52XXADT differential meters cover 20 mm, 50 mm, and 100 mm ranges with 0.01 mm resolution, plus or minus 0.1%FS accuracy, RS485 output, and low temperature drift. JMDL-22XXAT crack gauges can track joint opening or crack width up to 200 mm, while JMLS-22XXADT wire rope sensors can monitor longer movement paths up to 2000 mm. When displacement readings are paired with strain gauges, load cells, tiltmeters, and weather data, bridge teams can distinguish seasonal joint travel from abnormal movement, bearing restraint, foundation settlement, or localized damage. 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 displacement sensors
The future of displacement sensors will put stronger emphasis on installation metadata. Many errors in displacement monitoring begin before the first reading: wrong range, poor bracket alignment, cable tension errors, unprotected connectors, zero readings taken during unstable loading, or channel names that do not match drawings. Kingmach smart displacement products store sensor data and measurement records, and future workflows can add digital installation forms, photos, QR codes, baseline checks, and automatic range verification. A field technician could scan the sensor, confirm whether it is a 50 mm, 100 mm, 200 mm, 1000 mm, or 2000 mm model, then bind it to the monitoring point. That small process improvement can prevent costly confusion months later, especially in projects with many cracks, joints, anchors, geogrid points, and rock-layer measurement depths. 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 displacement sensors
For embedded displacement sensors such as multipoint and bedrock displacement meters, maintenance depends heavily on installation records because the sensing parts may not be visible after grouting or backfilling. For JMDL-31XXAT multipoint meters, keep drilling depth, anchor head depth, grouting date, point number, cable route, and baseline readings in one record. The system may monitor three to five points, so channel naming must be exact. For JMDL-32XXAT single-point bedrock meters, record flange position, tie rod condition, anchor point, PVC pipe route, and expected movement direction. During service, compare adjacent depths rather than reading each channel alone. A shallow layer moving while deeper layers remain steady has a different meaning from full-depth displacement. Do not pull or shorten cables during cabinet work, and protect exposed sections from water, rodents, sharp edges, and construction traffic. 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 displacement sensors
For procurement teams, displacement sensors should be matched to the way movement actually happens. Linear joint travel, crack width change, formwork settlement, rock layer slip, geogrid strain, hydraulic cylinder position, and long span cable pull are not the same measurement task. Kingmach's JMDL-52XXADT differential displacement meter lists 20 mm, 50 mm, and 100 mm ranges with 0.01 mm resolution, plus RS485 output and low temperature drift. The JMLS-22XXADT wire rope sensor reaches 500 mm, 1000 mm, and 2000 mm ranges with 0.1 mm resolution and IP67 sealing. The JMDL-49XXAT formwork meter is built for construction sites with IP68 protection and a 30-year designed service life. A good specification therefore starts with travel distance, mounting access, water exposure, signal distance, power supply, and whether the point must remain readable after construction equipment leaves the site. 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 displacement sensors 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
Andrew Lee
The visualization software is intuitive and powerful. It helps us analyze monitoring data efficiently.
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.
Emma***@gmail.comCanada
Dear Sir/Madam, we are interested in displacement transducers and settlement sensors for a geotechni...
Olivia***@gmail.comUnited States
Hello, we are currently sourcing high-precision strain gauges and load cells for a bridge monitoring...