Keyence is Introducing the LR-T Series reflective laser sensors, saying these products are defined by their versatility, detection stability and flexibility of use. There are just two models in the LR-T Series of laser sensors, but their versatility enables them to handle many reflective-detection applications. While the LR-T Series sensors are appropriate for applications requiring the detection of a target at a pre-determined position, they can also be used to measure variations in distance for applications such as level sensing or web tension control.
The LR-TB2000 laser sensor has detection range of 0.06 to 2m and the LR-TB5000 has a range of up to 5m, meaning that just one sensor can cover a range of applications requiring different detection distances. The result is easier use, simplified maintenance and, more importantly, a smaller inventory. Just one spare part can be sufficient for an entire production facility.
Keyence has designed the the LR-T Series laser sensors to make detecting targets from any mounting position possible, be it near to or far from a target, horizontal, vertical or diagonal. LR-T Series sensors are therefore suitable for installation on new or existing equipment. Moreover, the adjustable L-shaped brackets allow for quick sensor attachment to machine frames, while the free-angle swivel brackets can be used to mount the sensor on an M12 shaft.
The Time of Flight (TOF) detection method and custom integrated circuit give the LR-T Series a sampling rate of approximately 8GHz as well as increased processing capabilities to ensure consistently stable detection, even over long distances and regardless of the surface condition, colour or angle of the target. Thanks to TOF detection combined with integrated-circuit processing, the LR-T Series is not affected by parasitic reflections because distance is measured by calculating the time it takes for the pulsed laser beam to travel from the sensor to the target and back again.
Furthermore, the beam-spot size can be adjusted to guarantee reliable detection of any target, regardless of its surface type (mesh, uneven, rounded or powder, for example). This adjustment is done by simply turning the rotary dial with a screwdriver, the being connected to a disc with multiple lenses. Unlike the commonly used focusing mechanism, which adjusts the beam-spot diameter by repositioning a single lens, the step-disc mechanism locks in on the lens with the optimal diameter. This eliminates the potential for beam-spot variation caused by displacement of a position-dependent lens due to vibrations.
Up to four sensors can operate in close proximity with each other to detect multiple points on a target without the risk of mutual interference. The custom integrated circuit prevents the LR-T Series from being affected by ambient light (up to 100,000 lux) or any other type of light generated in production processes.
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