Infrared (1-999,990 RPM) High speed sensor.

IRS-W or IRS-P: Ideal sensor for working 0.5 to
1.0 inch (12 to 25 mm) from high speed equipment
or other applications providing only contrasting
light and dark surfaces or beam interruption by
solid objects.
Common usage: Dentist and other high speed
drills, slots or gear teeth. Does not require
reflective tape.

Operating 0.5 to 1.0
Distance (12 to 25 mm)
Speed Range 1-999,990 RPM
Operating -10