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Article | May 20, 2013
Pepperl + Fuchs: Ultra-miniature photoelectric sensors
Available in four sensing modes, the R2 Series Ultra-Small Sensors from Pepperl+Fuchs feature a 24 mm x 7.5 mm x 11.2 mm housing, industry standard mounting footprint, a flush and wear-resistant antistatic glass lens and a 45° cable outlet to maximize mounting flexibility.
The R2 series can be mounted in extremely tight spaces and close to moving objects to deliver high performance and reliable operation in a wide range of applications regardless of the color, texture, or shape of the object(s) being sensed. The R2 series is said to be the only nano-sized photoelectric sensor available with Background Evaluation (BGE) mode. Utilizing a fixed background such as a conveyor or machine part as a reference, R2 series BGE sensors are an alternative to retroreflective sensors, reliably detecting objects without the need for a reflector. Advanced thru-beam mode R2 sensors are equipped with a secondary emitter LED that provides a laser-like spot size for high-precision applications and eliminates the need to apply external apertures. The R2 series is also available in polarized retroreflective and background suppression modes. Industry standard 15 mm mounting hole separation enables R2 series sensors to easily retrofit into existing applications. Threaded sensor mounting holes enable installation without mounting nuts to simplify installation and save time.The sensors feature a glass optical surface, which is resistant to environmental contaminants, chemicals, and abrasion. The tamperproof housing of each R2 series sensor ensures that unauthorized personnel cannot make modifications or alterations after the sensor is setup. Enhanced and strategically placed LEDs clearly indicate the sensor’s operating state. R2 series no-load supply current is less than 10 mA. Maximum sensing distances vary by detection mode, with thru-beam mode sensors offering a range up to 2.5 meters (8.2 feet). These sensors deliver a response time of 600 µs, and can operate with 10-30 VDC supply voltage and within operating temperatures from -25 °C to 60 °C (-13 °F to 140 °F). R2 series photoelectric sensors are IP67 rated, carry the CE mark and UL and cUL approvals.
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