1512B X-Y Sensor
Can be used for any X-Y position measurement task, including rotation, vibration, and runout measurements.
1700B Level Sensor
Measures the leveling, inclination, and flatness from the horizontal plane of an object with sensitivity of 0.1 arc-seconds.
1550A Angular Sensor
Measures a tiny variation of a surface or the Z-motion of an object regardless of its reflectivity or color.