Lab Quiz - Proximity Sensors Part 2

Sensor, Unshielded

A ______ well is an area in a surface void of materials that would falsely trigger a(n) ------ proximity sensor. The size of this void is defined by the manufacturer.

Ferrous Non-Ferrous Metallic Non-Metallic Liquids The Human Body

Capacitive proximity sensors can detect which of the following:

Electrostatic

Capacitive proximity sensors us a ______ field which is generated by an oscillator when the target comes within range of the sensor.

Dielectric Constant

Capacitive proximity sensors use correction factors for various targets based on the ______ of the material. A number greater than 1.2 can be detected with higher numbers being easier to detect.

Control Relay = E Proximity Sensor = I Limit Switch N.C. = B Solenoid = F Flow Switch = H Pushbutton N.O. = A Float Switch = G Temperature Switch = C Photoelectric Sensor = D

Control Relay = Proximity Sensor = Limit Switch N.C. = Solenoid = Flow Switch = Pushbutton N.O. = Float Switch = Temperature Switch = Photoelectric Sensor =

Switching

The ______ frequency is the maximum speed at which a sensor will deliver discrete individual pulses as the target enters and leaves the sensing field. This value is always dependent on target size, distance from sensing face, speed oftarget and switch type.

Shielded, Unshielded

The ______ proximity sensor allows the electromagnetic field to be concentrated to the front of the sensor face which allows the sensor to be flush mounted in surrounding metal. A(n) ______ proximity sensor will trigger if mounted directly in a metal surface.

Mild Steel

The standard target for a capacitive sensor is constructed of 1mm thick ______ with sides equal to the active face of the unit.