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What types of industries and applications use LVDTs?
Prepared by Harold Schaevitz
Click application title
below for more information.
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- Post process measuring device for automatic cylindrical
grinding
- Measuring leak down in brake calipers
- Final length check of tubing in automated air conditioning
condenser coil machine
- In-process measurements for automated grinding operations
- Thickness measuring in multiple locations of flywheel to
insure balance.
- Final height measurement of brass insert after insertion
into plastic intake manifolds for truck gasoline engines.
- Confirming installation of contacts in automated assembly
of connectors.
- Thickness measurement of steel in assembly operation using
two LVDTs differentially.
- Automated cutoff operation of long 6” diameter tubing
measuring overall length.
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- Displacement measurement of imbedded concrete anchors tested
for tensile, compression, bending strength and crack growth
in concrete.
- Deformation and creep of concrete wall used for retaining
wall in large gas pipe installation.
- Dynamic measurement of fatigue in large structural components
used in suspension bridges.
- Down-hole application: measuring displacement (creep) of
bedrock.
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- OEM type LVDTs and VRTs for large and medium steam inlet
valve to measure position of stem for pre heating turbine
and operation.
- Conditioning valves for large and medium steam turbines.
- Reheat and stop valves for large and medium steam turbines.
- Throttle valve positioning for large and medium steam turbines.
- Feed water boiler pump valve positioning.
- Natural gas fuel valve position for gas turbines for throttle
control.
- Gas turbine guide vane actuator position feedback for throttle
control.
- Turbine shell expansion.
- Monitoring hydraulic fluid level in reservoir of feed water
pumps in nuclear reactor core.
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- Measuring final height placement for automotive wheel trim
- Measuring injector height for diesel engines
- Measure movement of specific features of foam core used
in lost foam casting process during sand compaction operation.
- Height measurement of screws after insertion into automotive
door assembly.
- Thickness measuring in multiple locations of fly-wheel to
insure balance.
- Expansion measurement of solid fuel rocket motor casing
during temperature testing.
- Providing indication and feedback position of rocket engine
nozzle actuators during testing.
- Controlling depth of hole during machining operations in
a rotary transfer machine.
- Hand operated gaging stations for measuring height of air
conditioning compressor part.
- final grinding dimensions of brake pads utilizing an air
extended LVDT.
- Dancer roll application for keeping controlled tension on
material used in tire manufacturing.
- Compressing operation of large bearings for railroad truck
axle bearings.
- Replacement of dial indicators monitoring the final thickness
dimension of disc brake pads.
- Verifying holes too small for detection with a proximity
probe in backing plate of disc brake pad.
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- Monitoring and adjustment verification of die shut height
vertically mounted to die or die shoe externally.
- Monitoring of forming operations performed in die for quality
of part or automated servo adjustments
- Monitor final strip feed out position to maintain proper
length of parts and part position in progressive die.
- Servo motor position feed back in automated servo dies
- Material thickness in post and pre-forming operations
- Differential in-process measurement of 4’ wide coil
on large blanked fender panels.
- Measuring height of sealing radius in metal gasket.
- Measuring compaction of friction material in molding operation
used in the manufacture of brake pads.
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- Measure displacement of thermostat valve stem for diesel
truck engine monitoring system.
- Displacement of diaphragm in automated whole blood processing
equipment. (LVDT base pressure transducer)
- Linear actuator feedback position used in boiler systems.
- LVDT incorporated into proportional valve assembly providing
position feed back.
- Blood-testing device measuring the displacement of blood
cells as they contract. Clinical usage, diagnosis of blood
disorders.
- Brake pedal position for brake by wire system.
- Steer by wire system attached to rudder assembly.
- Measuring very small displacements for high performance
automotive drive and crankshaft shaft balancing machine.
- Measuring displacement of diamond tip to determine material
hardness.
- Use of special LVDT with SAE fitting welded to one end rated
at 1500 PSI for measuring displacement of piston stoke in
variable rate pump assembly.
- Providing position feed back of seat movement for damping
device in agricultural equipment. (reducing operator fatigue)
- Position feed back in high speed injection molding machine
(die closure)
- Measurement of die wear, high speed injection molding equipment.
- Position feed back for automated spot welding control system.
- Special unit used in linear actuator position feed back
aircraft ailerons.
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- Slice lip final positioning, maintaining thickness of slurry.
- Pulp refiner plate actuator position feedback to maintain
plate gap with variable loads of material.
- Pinch gap of rollers to control thickness of adhesive glue
applied to corrugation material used for shipping boxes.
- Angular displacement of dancer arm for position feedback
to maintain tension in roll.
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- Replacement of string pot in severe duty linear displacement
valves for water treatment plant.
- Monitor displacement of pneumatic valve in process of chemicals
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- High vacuum environment measuring mirror alignment angle.
- High pressure, 5000 psi using specially designed spring
loaded LVDT +/- 1.00” used for feed back position of
cylinder.
- Hermetically sealed spring loaded LVDT utilized for it's
internal hermetically sealed attributes holding pressure (350
psi) while making expansion measurements.
- Spring loaded LVDT used on tensile testing machine to measure
material as it is compressed.
- Passenger automotive fuel tank, to measure expansion and
contraction displacements during fatigue testing.
- Position of fuel valve in testing gas turbines (hazardous
location).
- Radial / axial expansion and contraction of soil samples.
- Testing dry cell batteries for maximum radial and axial
crush displacement before failure.
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- R&D of suspension performance and profiling (linear
travel)
- Shock absorber performance and profiling of characteristics
- Throttle position
- Steering position
- Active suspension systems
- Transmission gear indication
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