Displacement Sensor | LVDT
                     Benefits of using Ono Sokki’s displacement 
sensor in industrial applications
In many industrial applications, where accurate measurement of linear or 
angular displacements is necessary, displacement sensors are 
indispensable. Displacement sensor are used for quality control and 
inspection purposes in industries such as automotive, electronics, 
aerospace, and manufacturing. To make sure that goods fulfil requirements, 
they can measure surface profiles, component tolerances, and dimensional 
variances. Position control systems use sensors to give precise feedback 
on the positions of moving components or objects.
This is essential for applications including material handling systems, 
automated assembly lines, robots, and CNC machines. To precisely align 
parts or machines, displacement sensors are used. They provide 
accurate equipment placement and alignment by measuring deviations 
from a reference position and offering real-time feedback for 
adjustment and alignment activities.
Displacement Sensor 
Applications
● Manufacturing and automation
● Automotive Industry
● Aerospace and aviation
● Civil Engineering and Construction
● Electronics and Semiconductor Manufacturing
● Medical Devices and Biomechanics
What are the features of a displacement sensor?
1. Measurement Range: Depending on the needs of the application, 
displacement sensors may measure small- or large-scale 
displacements since they come in a variety of measurement ranges.
2. Accuracy and Resolution: A displacement sensor's resolution is the 
smallest change in displacement that the sensor is able to detect, 
while its accuracy is how accurately it detects the genuine 
displacement value.
3. Non-contact Measurement: Many displacement sensors utilize non-
contact measurement techniques, such as optical or capacitive 
sensing, which do not require physical contact with the object 
being measured.
4. Sensing Principle: Displacement sensors employ various sensing 
principles, such as capacitive, inductive, optical, or magneto 
strictive, depending on the specific application requirements.
5. Output Signal: Displacement sensors can provide different types of 
output signals, including analog voltage, analog current, digital, or 
frequency signals.
6. Environmental Robustness: Industrial displacement sensors are 
frequently built tough and protected from adverse environmental 
factors including dust, moisture, vibration, and severe temperatures.
Types of displacement sensors
● Potentiometric Sensors: These sensors measure displacement by 
use of a sliding contact and a resistive element. A voltage output 
proportionate to the displacement is produced by the change in 
resistance as the contact travels along the resistive element.
● Capacitive Sensors: By sensing variations in capacitance between two 
or more electrodes, capacitive sensors are able to quantify 
displacement. By changing the spacing between the electrodes, the 
displacement causes a change in capacitance, which is then translated 
into a measurement of the displacement.
● Inductive Sensors:The electromagnetic induction concept is used by 
inductive sensors to sense displacement. An electromagnetic field is 
produced by a coil, and as a metallic target moves, the field changes. 
These changes are recognised and translated into displacement data.
● Optical Sensors:Optical sensors use detectors and light beams to 
gauge displacement. They may ascertain an object's location or 
displacement using a
variety of methods, including laser-based approaches, 
triangulation, and interferometry.
● Hall Effect Sensors: The Hall effect, which is the voltage produced when 
a magnetic field is applied perpendicular to the current flow in a 
conductor, provides the basis for Hall effect sensors, which monitor 
displacement. The Hall voltage changes as a result of the 
displacement, changing the magnetic field and enabling a 
measurement of the displacement.
● Eddy Current Sensors:The electromagnetic induction concept is used 
by eddy current sensors to measure displacement. An alternating 
current coil creates eddy currents in a conductive target; these eddy 
currents are measured and translated into displacement values when 
the coil and target interact differently due to displacement.
● Linear Variable Differential Transformers (LVDT): When measuring linear 
displacement, LVDT sensors are frequently utilised. They have two 
secondary coils twisted on a cylindrical core, in addition to a primary 
coil. Differential voltages that indicate displacement are produced 
when the main and secondary coils' coupling is altered by 
displacement.
What are the three main components of a sensor?
1. Sensing Element: The displacement sensor's detecting element 
interacts with the target or thing being measured. After detecting the 
displacement, it transforms it into a signal that can be measured. 
Depending on the kind of displacement sensor, different sensing 
elements are used. A light source, lenses, and a detector, for instance, 
may make up the sensing element of an optical displacement sensor. 
Electrodes or capacitive plates make up the sensing element of a 
capacitive displacement sensor.
2. Signal Processing Unit: After receiving the signal from the sensing 
device, the signal processing unit processes it to provide a useful 
measurement or output. Antenna-to-digital converters (ADCs), 
amplifiers, filters, and other electronics that condition and transform 
the unprocessed signal into a form that may be used may be included 
in this device. To improve the measurement's accuracy and stability, 
the signal processing unit may additionally include mechanisms for 
compensating and calibration.
3. Output Interface: The measurement output must be sent to the user or 
control system via the output interface. Depending on the needs of 
the sensor and the application, this interface may take the form of 
digital signals, analogue signals (voltage or current), or other kinds of 
outputs. To link the displacement sensor to the external system, the 
output interface could have terminals, connectors, or communication 
interfaces (such Ethernet or serial communication).
What is the working principle of displacement 
sensors?
● Potentiometric Sensors: Potentiometric sensors use a resistive element 
and a sliding contact. The displacement of the sliding contact along 
the resistive element changes the resistance, which is converted into 
a voltage output proportional to the displacement.
● Capacitive Sensors: Capacitive sensors use capacitance shifts to 
sense displacement. The displacement modifies the space between 
the two or more electrodes that make up the sensor, changing the 
capacitance as a result. Next, the change is translated into a 
measurement of displacement.
● Inductive Sensors: electromagnetic induction is used by inductive 
sensors. The electromagnetic field produced by the coil in the sensor 
is induced by the movement of a metallic target. Displacement values 
are generated by detecting these changes.
● Optical Sensors: Optical sensors measure displacement by means of 
light beams and detectors. They can use a variety of strategies, 
including laser-based approaches, triangulation, and interferometry. 
The displacement may be measured because it modifies the location 
of the light that is diffracted or reflected.
Culmination
For industrial applications, Ono Sokki's displacement sensors provide a 
number of noteworthy advantages. Their exceptional precision and resolution 
guarantee accurate displacement measurements, which enhance quality 
assurance and inspection procedures. The sensor's and the equipment being 
measured's lifespan are increased by the non-contact measuring 
capabilities, which reduces the possibility of wear, damage, and 
interference. The wide range of linear gauge sensor measurement options 
provided by Ono Sokki’s displacement sensors makes them suitable for 
diverse industrial applications, from automotive and aerospace to electronics 
and manufacturing. They can effectively monitor and control position, 
alignment, vibration, load, and force, enabling optimal performance and 
operational efficiency.
For any clarifications or queries, please feel free to contact us: 
Mobile: +91–92055–92194 or +91–92055–92195
Email ID: [email protected]
Website: www.onosokki.co.in