QS18 Series "World Beam". The photoelectric sensors of the World-Beam QS18 series offer excellent optical performance in a compact QS18 housing, along with a unique space-saving design that serves as a direct replacement for cylindrical or rectangular sensors. The sensors provide reliable detection of a solid background and can identify the color and shape of an object even with varying forms. The QS18 series sensors are available in opposing, polarized or non-polarized reflective, convergent, standard or wide-angle diffuse configurations, with laser, ultrasonic, plastic or glass fiber optics, as well as detection modes with fixed or adjustable fields. ABS housing with 3 mm mounting parts included. Supply voltage of 10 V dc to 30 V dc. Easy-to-use sensitivity potentiometer on retro and diffuse models (adjustable with finger or screwdriver). Semiconductor complementary (1-pole switch): NPN or PNP (current sink or current source), depending on the model. Two LED indicator lights on the top of the sensor. Fast response times. 2 m pre-wired connection cable or 4-pole Pico connector with connection wire, 150 mm. All versions come with a mounting bracket; the polarized retro model also includes a reflector. Operating temperature range: -20 to +70 °C. Designed for IEC IP67, NEMA 6.