Application Solutions for Inner and Outer Diameter Measurement

Traditionally, inner diameter measurements were done with hand tools like vernier calipers, inside micrometers, telescope gauges or bore gauges. While these tools offered high levels of precision, they also required time and expertise... making them susceptible to human error.
Today, measurement sensors like laser scanners and optical comparators are commonly used to measure ID/OD. These sensors are highly accurate and work well for difficult-to-reach and contact-sensitive applications.

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When looking for the best way to measure outer diameter, there are several important factors to consider, including the shape of the target, the type of measurement system, and the installation environment. Selecting equipment that doesn't adequately meet your needs can lead to insufficient precision and increased man-hours during production, so choosing the right equipment is important. This site is designed to help you discover the best way to perform outer diameter measurements with confidence.

The radius of a cylinder is defined as the distance from its center to any point on its edge, and it’s a linear measurement that extends from the center of the circumference. Since the OD measurement is defined as a straight line passing through the center of the cylindrical space and connecting both sides, we can easily deduce that the radius is ½ of the diameter.
Conversely, the ID measurement is twice the radius of the inner circle. Radius measurements are rather important when it comes to determining the mechanical properties of parts such as gears, wheels, and pulleys.
Find the best measurement method and the right equipment to measure "Radius (R) and Inner Diameter."

When looking for the best way to measure radius (R), there are several important factors to consider, including the type of measurement system and the installation environment. Selecting equipment that doesn't adequately meet your needs can lead to insufficient precision and increased man-hours during production, so choosing the right equipment is important. This site is designed to help you discover the best way to perform radius measurements with confidence.

The LS- Series does so much more than just solving conventional outer diameter measurement problems. See this booklet for the advantages of the high-intensity green LED light source and introductions of useful functions not available in the catalog or online.

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The exact, non-contact measurement of length, speed and part length as well as measurement of width or cross section area of materials in the production process or during the transport of goods are typical ELOVIS measurement tasks. The measurement is carried out by optical gauges, using different kinds of light and thus is contactless and maintenance-free. ELOVIS developed the first laser encoder systems for measuring length and speed 25 years ago. Since then, μSPEED length gauges and speed gauges for contact-free measurement have been used worldwide in industrial environments. Laser length measurement and laser speed measurement by μSPEED laser encoder systems equipping length measurement solutions and length measurement machines represent the product focus of ELOVIS GmbH.

Other ELOVIS gauges are also measuring contact-free by the use of light. To mention is the contactless, accurate length measurement of discrete parts. The μMETER-SLM gauges were developed especially for this purpose. Optical micrometers of the type SLM are based on the through-light principle, work contact-free and therefore are maintenance-free. Parts and fix lengths are measured in-line, meaning during the production process and whilst still in production. The length measurement system SLM works with high precision and independent of the measuring material without touching the measurement material. The measured parts should be transported straight and separated during SLM measurement.

An additional focus at ELOVIS is calibrated length measurement systems which can be installed in calibrated length measurement machines. Length measurement machines according to MID/32/EU are conformity assessed in accordance with the European Measuring Instruments Directive. MID length gauges also comply with the German calibration law. Many calibration offices now have made good experiences with the non-contact measurement technology based on the ELOVIS MID-COUNTER in conjunction with tactile measuring wheel encoders or in conjunction with the ELOVIS laser encoder μSPEED. The German National Metrology Institute PTB (Physikalisch Technische Bundesanstalt,  Braunschweig) is the notified body for length measurement and area measurement according to module B and is often used by ELOVIS as the conformity assessment body. Calibrated length and area measurement devices are available from ELOVIS for the measurement of cables, paper, fleece, felt, nonwoven, carpet as well as for floor coverings. Calibrated length counters or so-called MID length counters using the MID-COUNTER in combination with measuring wheel or the MID-COUNTER in combination with laser gauges type μSPEED are also in use in other European countries. All ELOVIS systems are CE certified.

When measuring widths, cross sections, diameters and heights, ELOVIS gauges also use non-contact, contactless or contact-free measurement technology  based on laser, LED or structured light technology e.g based on camera vision sensors. All measurements are therefore free of slippage, wear-free, largely independent of material and user-independent, permanently accurate and also maintenance-free.

ELOVIS – Specialists for non-contact measurement of length, speed, part length, …

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