The typical screw torque module includes a DC screw motor and a Pneumatics slide with a gripper, which also includes a ______ to indicate the gripper is closed.

The typical screw torque module includes a DC screw motor and a Pneumatics slide with a gripper, which also includes a ______ to indicate the gripper is closed.

• A. Capacitive sensor
• B. Magnetic switch
• C. Inductive sensor
• D. Photoelectric sensor

Answer: (C)

When a pneumatic gripper closes, you want a fast, reliable signal that indicates the metal jaws are fully shut without touching them. An inductive proximity sensor fits this need perfectly because it detects metal targets in its near field without any physical contact. The gripper typically has a metal component or a small plunger on the jaw that comes within the sensor’s sensing range when closed; when this metal target is detected, the sensor changes its output and tells the controller that the gripper is closed. Inductive sensors are robust in dirty, oily, or dusty environments and are not affected by lighting conditions or surface color, which makes them dependable for machining and automation setups. Capacitive sensors can register many materials but are more sensitive to humidity and contents around the sensor, which can lead to false readings in industrial settings. Magnetic switches require a magnet on the gripper and can suffer from magnet aging or misalignment. Photoelectric sensors rely on a clear optical path and can be tripped by dust, glare, or reflective surfaces, making them less reliable for detecting closed metal jaws in a compact, dark environment.

When a pneumatic gripper closes, you want a fast, reliable signal that indicates the metal jaws are fully shut without touching them. An inductive proximity sensor fits this need perfectly because it detects metal targets in its near field without any physical contact. The gripper typically has a metal component or a small plunger on the jaw that comes within the sensor’s sensing range when closed; when this metal target is detected, the sensor changes its output and tells the controller that the gripper is closed. Inductive sensors are robust in dirty, oily, or dusty environments and are not affected by lighting conditions or surface color, which makes them dependable for machining and automation setups.

Capacitive sensors can register many materials but are more sensitive to humidity and contents around the sensor, which can lead to false readings in industrial settings. Magnetic switches require a magnet on the gripper and can suffer from magnet aging or misalignment. Photoelectric sensors rely on a clear optical path and can be tripped by dust, glare, or reflective surfaces, making them less reliable for detecting closed metal jaws in a compact, dark environment.