KEYENCE is known for durable sensors and PR-G is one of the most durable.
The PR-G Series has options powerful enough to blast 30m (98.4'). This power also benefits shorter range applications by being able to blast through dust, dirt, oil, etc.
A simple trimpot is used to adjust the sensitivity on all PR-G sensors. This series also features highly visible output indicators and options that have a digital display, providing real-time feedback.