Electricity + Control September 2015

SENSORS, SWITCHES + TRANSDUCERS

ROUND UP

Retro-reflective sensors – no need for manual alignment

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 SouthernAfrican distributor for Leuze sens- ing 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.

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. Enquiries: Gerry Bryant.Tel. 011 615 7556 or email bryant@countapulse.co.za

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 ±2,2 mm over a distance of 500 mm. “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 ob- jects at short ranges,” Bryant points out. The elimination of an additional front screen prevents reflections and reduces drop formation for a more accurate sens- ing capability. Accuracy and reliability of

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SENSING SOLUTION SPECIALIST

Tel: 011 615 7556 | Fax: 011 615 7513 | e-mail: clive@countapulse.co.za