Cut Sheet

V8-T12-6 Volume 8—Sensing Solutions CA08100010E—November 2012 www.eaton.com
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12.1
Sensor Learning Course
Learning Module 23: Limit Switches, Proximity Sensors and Photoelectric Sensors
In the Workplace
As a conveyor moves the stacked boxes onto a turntable, a
sensor detects the boxes in position and tells the machine to
start the turntable and index the wrapping material. Another
sensor monitors the play out of wrapping material to detect an
empty spool and alert set-up personnel. Once the operation
ends, the wrapped boxes move on to their shipping destination.
The Sensor “Sees” the Box and Tells the Wrapping
Machine to Begin Operating
Thanks to sensors, the repetitive and tedious work done in
this factory is handled precisely and reliably by machinery
and control systems working together.
Review 1
Answer the following questions without referring to the material
just presented. Begin the next section when you are confident
that you understand what you’ve already read.
1. Sensors can detect the ___________ or __________ of
objects.
2. The three main sensor categories are:
________________________
________________________
________________________
3. A limit switch is an _____________________ device that
relies on physical contact with the target.
4. The sensor type that can only detect metallic objects is the
_________________ sensor.
5. The sensor type that uses a broken beam of light to detect
objects is commonly referred to as a ____________________
sensor.
Answers to Review 1 are on Page V8-T12-41.