The calibrated abeam optics on the Leuze PRK 18B Series sensors ensure precise striking of even the smallest reflectors, eliminating the need for time consuming alignment after mounting. With a host of new features, the innovative sensor can reliably detect small, thin and transparent objects, such as foils, even under extreme environmental conditions.
Gerry Bryant, managing director of sole Southern African distributor for Leuze sensing equipment – Countapulse Controls – says that these compact sensors have a shorter response time, higher switching frequency, improved adjustability of the switching point and a tracking function for extending the cleaning interval.
Leuze abeam technology includes an auto-collimated lens which is up to eight times more precise than standard optics. With a maximum deviation of ±0.25%, the light beam has a deviation of only ±2.2mm over a distance of 500mm.
“When compared to a two lens system, these auto-collimated sensors have only one optical channel, thereby eliminating angle errors and removing restrictions with regard to their fitting position. This makes them the ideal choice for detection of objects at short ranges,” Bryant points out.
The elimination of an additional front screen prevents reflections and reduces drop formation for a more accurate sensing capability. Accuracy and reliability of detection is further ensured through the compensation for temperature fluctuations of ±20°C.
The Leuze PRK 18B has a switching frequency of up to 5,000 Hz, a response time of 100 µs that makes it considerably faster than comparative sensors at dynamic transport speeds and a jitter time of 32 µs, resulting in increased accuracy at static transport speeds.
The M4 internal threads of the Leuze PRK 18B sensor are integrated into the highly robust housing, reducing materials by 80% and resulting in faster, uncomplicated initial mounting and subsequent device changes.