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This section provides an overview for linear displacement transducers (ldt) as well as their applications and principles. Also, please take a look at the list of 16 linear displacement transducer (ldt) manufacturers and their company rankings. Here are the top-ranked linear displacement transducer (ldt) companies as of December, 2024: 1.Sentech, Inc., 2.ASM, 3.Fiama Srl.
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Categories Related to Linear Displacement Transducers (LDT)
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A linear displacement transducer (LDT) is a device that uses a laser to measure the position and distance of an object.
A laser beam is irradiated onto the object's surface, and the displacement of the object is detected and measured. It is a non-contact, highly accurate displacement measurement.
Another feature of this device is its high-speed detection capability. Since laser beam irradiation and light detection occur almost simultaneously, displacement can be measured instantaneously. This makes it ideal for analyzing high-speed movements and vibrations.
Linear displacement transducers (LDT) are used in various applications due to their non-contact, high-precision measurement capability.
By measuring minute displacements and deformations when a force is applied to an object, the elastic properties and rigidity of the material can be evaluated.
By measuring vibration frequencies, vibration modes, and resonance phenomena of objects, the stability and durability of structures can be evaluated. It also plays an important role in nanoscale research.
By measuring the vibration and displacement of materials and devices, their properties and operating principles can be analyzed.
Linear displacement transducer (LDT) uses triangulation as its measuring principle. The main components consist of a light emitter and a light receiver. The light emitter consists of a light emitter and a light emitting lens, while the light receiver consists of a linear image sensor and a light receiving lens. These parts are used to survey the object and detect displacement with high accuracy.
First, light from the projection element is focused by the projection lens and projected onto the object. The object reflects the light, and the light reaches the linear image sensor through the light-receiving lens of the light-receiving part. This creates a spot of light on the linear image sensor, which detects the position of the object.
As the object moves, the light spot on the linear image sensor moves and the displacement of the object is detected by sensing the amount of movement. In addition to the linear image sensor, a position-sensitive device(PSD) may also be used.
There are various types of linear displacement transducers (LDT), the most common of which are dimensional, displacement, and geometrical measurements.
For dimension measurement in a stationary state, such as thickness measurement, step measurement, inner/outer diameter measurement, and so on. It measures the distance to the reference surface and the distance to the measurement surface, and outputs the difference as dimensions.
Linear displacement transducer (LDT) is used for dynamic measurements such as amplitude measurement of a vibrating object or runout measurement of a rotating object. The distance to the measurement point is measured at a fixed sampling cycle, and the displacement is calculated from the maximum and minimum values and output as a displacement value.
Measures the flatness of a surface or the curvature of a surface. It measures the distance between multiple points and outputs the shape of the measurement range based on the coordinates and measured values of the measurement points. For this reason, many of them have a drive mechanism.
When the sensor head is attached to the drive mechanism, it is less rigid than a fixed sensor head and is therefore more susceptible to disturbances such as vibration. For high-precision measurement, the sensor head is generally mounted on a rigid fixed stand and the measurement object is moved.
The accuracy of a laser displacement sensor depends on the sensor's characteristics and the external environment. Accuracy is calculated by taking into account not only resolution, but also linearity, temperature characteristics, and other factors.
If the resolution is ±1 μm, linearity is ±0.2% F.S (measurement range 20 mm), and temperature characteristic is ±0.08% F.S/°C (measurement temperature range 1°C), linearity is 20 mm x 0.1% = 0.02 mm and temperature characteristic is 20 mm x 0.08 % = 0.016 mm. The sum of these values gives a measurement accuracy of ±0.037 mm. Therefore, measurements in microns are not possible.
Thus, even if the resolution is high, accurate measurement is not possible if the linearity or temperature characteristics are poor. For high-precision measurement, it is preferable to use a sensor with a small measurement range and good linearity and to measure in an environment with no temperature variation.
In addition, it is necessary to select a sensor that matches the condition of the object to be measured, since the measured value may change depending on the surface condition of the object.
*Including some distributors, etc.
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Banner Engineering Corporation, established in 1966 and headquartered in Minneapolis, Minnesota, is a manufacturer and supplier of industrial automation products. They offer an extensive range of sensors, including proximity sensors, photoelectric sensors, and limit switches, for detecting object presence, position, and speed. Additionally, Banner provides a different types of switches, such as pushbuttons, toggle switches, and rotary switches, to control electricity flow and offer system feedback. Their wide array of controls includes PLCs, HMIs, and motion controllers, enabling automation of industrial processes.
Honeywell International Inc. was founded in 1885 and headquartered in Charlotte, North Carolina. Honeywell is a diversified technology and manufacturing company to global customers in many industries such as aerospace, building technologies, performance materials, manufacturing, and safety. Honeywell produces hardware and software solutions for each industry it serves. In building technologies, Honeywell designs access controls, electrical and wiring, fire life safety, and employee training services. In aerospace, Honeywell designs cockpit systems and displays, engines, cabin management and cleaning, and health and usage monitoring.
Curtiss-Wright Industrial, one division of Curtiss-Wright, originally founded in 1929 with its headquarters in the USA, is an integrated manufacturer of precision-engineered products and systems. The company, which includes the legacy brands of Arens Controls, Penny & Giles, PG Drives Technology, and Williams Controls, primarily serves the aerospace, defense, and naval markets worldwide. Products include power electronics, motor controllers, joystick controls, and industrial sensors. With manufacturing facilities in the USA, the United Kingdom, China, and India, Curtiss-Wright Industrial also provides support services for critical applications and system overhauls.
OMEGA Engineering Inc., founded in Norwalk, CT, in 1962 is a manufacturer of products used to measure temperature and humidity, flow and level, and pressure. The company's product portfolio includes thermocouple probes and assemblies, pressure gauges and switches, and air velocity measurement systems, wireless systems and portable optic sensors. The company serves markets including Automotive and Electric Vehicles, Renewable Energy and Energy Storage and Electronics and IT Infrastructure. The company also offers customer services that include support, custom research projects and customized services.
Transducers Direct, established in 1999 and located in Cincinnati, United States, is a manufacturer and supplier of advanced pressure sensors and transducers. The company's product range includes wireless pressure transducers, standard transducers, vacuum pressure transducers, and submersible pressure transducers. These products cater to diverse industries like Semiconductors, offering precise solutions. The company's services include comprehensive technical support and tailored solutions, ensuring customer satisfaction. Devoted to creativity, it consistently develops cutting-edge products. With over two decades of experience, the company exceeds industrial expectations, providing quality products and unmatched service.
Fiama, established in 1913 and headquartered in Parma, Italy, is a manufacturer of the market mechanical, electrical, electro-mechanical measurement and control instrumentation. The company offers a range of products, including measurement, control instrumentation, and position indicators. It also provides handwheel indicators, rotary encoders, and more. Its product is suitable for reducing speed and increasing torque. Moreover, the company has achieved UNI EN ISO 9001 certification. Its products are mainly intended for manufacturing machinery for the food, packaging, wood, glass, and ceramic industries.
Optex Fee Co., Ltd., was established in 2002 and based in Kyoto, Japan, is a manufacturer and supplier of factory automation sensors and solutions. The company offers an extensive and diversified product portfolio including photoelectric sensors, fiber-optic sensors, displacement sensors, non-contact thermometers, vision sensors, and other industrial automation products. These sensors and solutions play a pivotal role in enhancing manufacturing processes across a spectrum of industries, including automotive, electronics, and packaging.
Ono Sokki Co. Ltd., founded in 1954 and based in Yokohama, Japan, is a manufacturer, distributor, and supplier of electronic measuring instruments and control systems. Its products include sound level meters, vibration meters, and FFT analyzers, utilized in research and development, quality control, and by production line engineers, particularly in the automotive industry. The company was the first to be designated by the government as a producer of sound level meters in Japan and also obtained ISO 14001 certification in 1997.
Sensotec, founded in 1985, is a manufacturer and application service supplier of sensors and transmitters specializing in pressure, level, and force measurements in Cornella de Llobregat, Barcelona. Sensotec offers pressure, level, and force transmitters. Its products cater to various industries and OEM manufacturers, providing sensors, transducers, and transmitters with output signals compatible with diverse measurement equipment. The company owns four brands: Lexitron, Leveltec, Nivomat, and Sensotec. The company serves customers from Africa, Asia, America, Europe, and Oceania.
ASM was established in 1979 in Moosinning, Germany where they are known as a manufacturer of sensors. The company designs different types of sensors mainly Displacement sensors, Inclination sensors, and Angle sensors that have applications in fields where displacement, position, length, and distance has to be measured, tested, or monitored. They are used in Injection Molding machines, Power Plant construction, Vehicle testing, Powerlifters, and Portal cranes. In the medical industry, they are used for precise positioning for Tomography, mammography, OP tables, and patient couches.
MTC Industries and Research Carmiel Ltd. is an AS9100D, ISO 9001:2015 and MIL-STD certified manufacturer of subsystems for the defense and aerospace industries established in 1977 in Karmiel, Israel. The company’s product lineup includes servo motors for converting electrical energy into mechanical energy, and servo actuators for providing controlled force and motion in platforms such as UAVs or gliding bombs. It also offers inertial sensors, gyroscopes, and slip rings for transmitting power and signals. The company’s products are mainly used by clients in the aerospace and defense sectors, such as Elbit Systems and Israel Aerospace Industries.
Omron Corporation, started in 1933 and headquartered in Kyoto, Japan, is a manufacturer of automation components, equipment, and systems, and it developed the first contactless proximity switch in 1960. It has four domains, including industrial automation, electronic components, healthcare, and social systems, and it provides products and services in around 120 countries and regions. Some of its products include microsensing devices, access control systems, industrial robots, surveillance cameras, and blood pressure monitors. In 1971, it developed the first online cash machine, and in 1972, it established Japan’s first welfare factory.
Micro-Epsilon was originally founded in Osaka and Micro-Epsilon America was founded in 1998, headquartered in Raleigh, North Carolina. Micro-Epsilon develops, manufactures, and distributes sensors to aerospace, battery production, glass production, wind power, precision optics, medical technology, transportation, semiconductor, and other industries. Micro-Epsilon’s sensor product categories include inductive, capacitive, laser, confocal, laser distance, magneto-inductive, draw-wire, rotation speed, color, paint thickness measurement, and fiber optic sensors in addition to interferometers and other sensor equipment.
RDP Group began in 1966 and is located in Wolverhampton, West Midlands in the UK, and Pottstown, Pennsylvania in the United States. RDP is a designer, manufacturer, and distributor of LVDT displacement transducers, amplifiers, load cells, and pressure sensors for use in manufacturing, power plants, and underwater applications. RDP is ISO 9001:2015 certified. RDP products include LVDT displacement transducers, amplifiers such as rail mounting amplifiers and DC-powered strain gauge transducer amplifiers, digital panel meters and multi-channel signal conditioning, and force sensors such as compression load cells and tension load cells.
EXSENCO, LLC., is based in Corpus Christi, Texas. EXSENCO is the American distributor for SANTET, Co. Ltd, which is a manufacturer of sensing and controls products based in Osaka, Japan. EXSENCO offers consultancy in the general area of control systems to provide clients with technology that adapts itself to changes in the workplace, rather than the workplace adapting to changes in technology. EXSENCO’s product segments include displacement & level measurement, servo valves, I-SAC servo controllers, and other products.
Ranking as of December 2024
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | Sentech, Inc. |
15.2%
|
| 2 | ASM |
12.1%
|
| 3 | Sensotec Group |
9.1%
|
| 4 | Fiama Srl |
6.1%
|
| 5 | Transducers Direct |
6.1%
|
| 6 | Omega Engineering, Inc. |
6.1%
|
| 7 | RDP Electronics Ltd |
6.1%
|
| 8 | Micro-Epsilon |
6.1%
|
| 9 | Ono Sokki |
6.1%
|
| 10 | Omron |
6.1%
|
Derivation Method
The ranking is calculated based on the click share within the linear displacement transducer (ldt) page as of December 2024. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
United States of America
|
6 | 50.0% |
|
Japan
|
2 | 16.7% |
|
Italy
|
1 | 8.3% |
|
Spain
|
1 | 8.3% |
|
Germany
|
1 | 8.3% |
|
United Kingdom
|
1 | 8.3% |
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