Fast and rugged slot sensors
Second quarter 2006
Other technologies
Banner Engineering is offering its SLM Series metal slot sensors that sense objects that pass between their fixed-distance opposed-mode emitter and receiver. Available in six slot widths, all models have a rugged metal housing and a fast response time of 500 microseconds, making them suitable for high-speed counting, edge detecting, and position verifying and level monitoring applications. The fixed slot width provides reliable opposed-mode sensing of objects as small as 0,30 mm. The available slot widths of 10, 30, 50, 80, 120 and 220 mm range.
"The U-shaped metal housing of the SLM sensor makes it versatile, durable and easy to use," explained Jeff Curtis, senior application engineer for Banner Engineering. "There is no need to align opposed-mode emitter and receivers." The SLM emitter and receiver are in fixed arms of the housing. Installation is accomplished by making use of the moulded-in beam guides and integral mounting holes. They are available in a range of sizes, making them a suitable alternative to existing fibre - and difficult to mount opposed-mode sensors.
These sensors enable users to accurately detect small objects at high throughput speeds and are suitable for a wide range of applications in the printing, pharmaceutical, packaging, material handling and automotive industries. Examples include:
* Sensing parts on conveyor rails and belts.
* Detecting object edges or protruding features.
* Verifying position, orientation and dimensions of components.
* Monitoring container fill levels.
* Counting gear teeth.
Several features of the SLM Series sensors make them easy to use:
* Available in six slot widths from 10 to 220 mm for easy installation.
* Includes single-turn potentiometer sensitivity adjustment and visible red beam.
* Installs easily using moulded-in beam guides that simplify beam placement.
* Offers light or dark operation, using a sealed switch.
* Features sealed, die-cast metal housing rated IEC IP67, NEMA 6.
* Includes 2 m or 9 m attached cable, 4-pin Euro-style QD or 3-pin Pico-style QD.
The devices operate on 10 to 30 V d.c. and are available with current sourcing (PNP), current sinking (NPN), or bipolar (one NPN and one PNP) output, depending on the model. Bicolour indicator lights provide ongoing operating status of the sensor.
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