Keyence introduces the PR-G Series, a new approach to self-contained photoeyes. This new line of general-purpose metal photoeyes is dedicated to fulfilling three main focuses: durability, high power, and ease of use.
In general, most photoeyes are made out of a resin material and are highly susceptible to damage due to impact, over tightening, or environmental effects. Sensor damage leads to increased costs due to downtime and replacement, and is all too common in industrial environments. By introducing a heavy duty metal body, the PR-G Series greatly decreases the amount of valuable time lost due to sensor damage. The durable body is highly resistant to oils, acids and alkaline detergents while maintaining both IP68 and IP69K enclosure ratings to negate the effects of harsh environments. 
Keyence Corporation of America