Slim sensor sets size standards

Citation

(2007), "Slim sensor sets size standards", Sensor Review, Vol. 27 No. 2. https://doi.org/10.1108/sr.2007.08727bad.006

Slim sensor sets size standards

Slim sensor sets size standards

The W2 range of sub-miniature photoelectric switches, from SICK (UK) Ltd, has a new super-slim family member – the W2 flat (Figure 6). Designed for applications where compactness is the order of the day or machine “real estate” is in short supply, the WS2 flat offers all the features of a photoelectric proximity switch, in a body just 3.5mm wide.

Figure 6 The new super-slim W2 flat from SICK (UK)

The sensor's diminutive size belies its capabilities. Offering an impressive size/ performance ratio, it can detect both transparent and reflective objects (two variants), no external amplifier is required and it can be directly connected to machine control system. Commissioning is simple, users simply connect the unit using M8 cable plugs, align it and it is ready. The laser-like light spot offers detection of the smallest of parts – giving precise detection capabilities without the disadvantages of real laser sources, such as reduced lifetimes and troublesome laser protection classes.

With an IP67 enclosure rating, the sensor has an operational temperature range between 220 and 508. Tough enough for most applications – with its robust housing offering metal-reinforced fixing holes – the sensor also has an impressive ability to resist the effects of external stimuli such as EMC, ambient light, impact and vibration.

The WS2 flat is available in different versions; the direct sensing WT2F version offers sensing distances of 8, 15 and 30mm while the through-beam WS/ WE2F version will operate up to 500mm. Applications suggested by SICK (UK) include electronic production, printing and packaging machines as well as assembly and handling systems. The W2 range is a complete photoelectric family comprising proximity and through-beam versions.