The R2 Series of photoelectric sensors go where others cannot—in extremely tight spaces and close to moving objects—due to their size, mounting flexibility, and other features, says developer Pepperl+Fuchs. The sensors, available in fours sensing modes, come in a 24- by 7.5- by 11.2-mm housing and maintain a standard mounting footprint, a flush and wear-resistant antistatic glass lens, and a 45° cable outlet. The company claims the R2 is the only nano-sized photoelectric sensor with background evaluation (BGE) mode, which uses a fixed background such as a conveyor or machine as a reference. They have a secondary emitter LED that provides a laser-like spot size for high-precision applications. Polarized-retroreflective and background-suppression modes are available, too. No-load supply current is less than 10 mA. Maximum sensing distances vary by detection mode; thru-beam mode sensors range to 8.2 feet. Response time is 600 µs. They can operate from 10- to 30-V dc.