FS-V21RP
KEYENCE FS-V21RP DIGITAL FIBER SENSOR 12-24VDC CLASS 2 PHOTOELECTRIC SENSOR NNB
You will find that the zinc coated finish stays intact even after repeated contact with water.
Keyence FS-V21RP Fiber Optic Amplifier Sensor
With 3 brushes included, you can switch between applications without cleaning.