Miniature sensors are IP 67 sealed in tubular enclosure measuring M12 x 1 x 70 mm, or in rectangular housing measuring 15 x 20 x 49 mm. They offer blind range down to 10 mm, with 10 msec reaction time. Switching point can be remotely adjusted using external teach-in capability, eliminating need for direct access to sensor housing. Six deg sonic beam angle enables sensing through tight openings.