Banner Engineering now offers the World-Beam QS18 series adjustable-field sensors - economical, self-contained devices that allow users to set a precise sensing cut-off point to eliminate background interference. A five-turn adjustment screw allows users to set or change the cut-off point from 20 to 100 mm quickly and easily. QS18AF sensors are suitable for applications located in small or difficult-to-reach areas, including presence sensing within the document handling, packaging, semiconductor, feeder bowls, automotive assembly and forest product industries. The sensors feature a universal mounting design that allows them to fit or retrofit most mounting situations quickly and easily.
QS18AF sensors emit a red light beam and compare the light signals that are reflected from the target to the sensor's two (differently aimed) detectors. If the signal reflected by the near detector is strongest, the sensor will respond to the object. If the signal reflected by the far detector is strongest, the sensor will ignore the object.
The sensors detect objects with relatively low reflectivity, even against close-in reflective backgrounds. The tiny, yet full-featured sensors, measuring just 34,5 mm high x 15 mm wide x 21 mm deep, provide high performance. With a 700 ms response time and repeatability of 175 ms, they are comparable to larger 'mini-style' or barrel sensors. Bright LED indicators, visible from 360°, keep users constantly aware of QS18AF operating status.
Integral circuitry protects the 10 to 30 V d.c. QS18AF sensors against reverse polarity, overvoltage and transient voltages. The output configuration includes a solid-state (complementary) SPDT switch with a choice of NPN (sinking) or PNP (sourcing) outputs, each capable of switching a 100 mA load.
The sensors feature a durable poly-carbonate/ABS alloy housing. They are rated IEC IP67 and NEMA 6 and operate in temperatures from 0 to +55°C. Users can choose models with a 2 or 9 m four-wire PVC cable, or with a 4-pin pico-style 150 mm pigtail quick-disconnect fitting (depending on model).
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