Cut-to-Length Steel Bar Posted in: Length Measurement – Tags:

Laser Rangefinders Measure Cut-to-Length for Steel Bars

Laser Sensors Measure Cut-to-Length by Sensing the Position of the End Relative to the Distance to a Saw Blade


A large steel producer makes products in various shapes and sizes by cut-to-length measurement techniques. Round bar stock is created by cutting a continuously-cast bar to specific lengths. Bar is fed down a roller conveyor and a laser distance sensor (AR1000) measures the position of the end relative to the distance to a saw blade. The length is displayed on a screen in a remote operator’s booth as the distance data is transmitted via 4-20mA current loop signal.

The AR1000 measures to the leading edge of the steel bar. The temperature of the bar may be as high as 1100°F and the accuracy is 2 mm.

Cut-to-length applications are a common distance measuring application for our long distance sensors. Our sensors are used to replace worn out encoders or to offer an accurate non-contact measurement solution. Our long distance sensors offer accurate long distance readings in order to be mounted in a safe location for a long lasting solution. Customers can send signals directly from the laser or our touch panel display to activate the saw to start the cutting process.

In many cases, our 8″ touch panel display can help any cut-to-length application be a few taps away from an easy plug-and-play solution. We’ve outlined how to quickly solve measurement challenges in an article & video with a brief focus on cut-to-length.

Related Products

AR1000 Laser Distance Sensor

The Acuity AR1000 laser distance sensor can measure up to 30 meters on natural targets and up to 150 meters with a retroreflective target with an accuracy of ± 3 mm. This rugged sensor is built for tough, industrial environments and applications such as fill level measurement and material height monitoring.

AS2100 Accurate Distance Sensor

The AS2100 is a highly accurate laser distance sensor that is designed to work well outdoors, in bright lights, and even on difficult targets such as hot or dark surfaces. With the ability to take accurate measurements (± 1 mm) from distances up to 500 meters away, and a measurement frequency of up to 250 Hz, it is the perfect laser for a wide range of applications.

AR2700 High-Speed Long Range Sensor

Acuity Laser’s ultra-compact rangefinder model. This eye-safe rangefinder has a measurement frequency of up to 40 kHz and can measure distances to natural targets up to 70 meters away or to retroreflective targets 270 meters away. This laser is best for applications that demand high sampling rates.

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