Proximity Sensors are available in models using high-frequency oscillation to detect ferrous and non-ferrous metal objects and in capacitive models to detect non-metal objects. Models are available with environment resistance, heat resistance, resistance to chemicals, and resistance to water.
Selection by Detection Method
|Items RequiringConfirmation||Inductive Proximity Sensors||Capacitive Proximity Sensors||Magnetic Proximity Sensors|
|Sensing object||Metallic objects (iron, aluminum, brass, copper, etc.)||Metallic objects, resins, liquids, powders, etc.||Magnets|
|Electrical noise||Affected by positional relationship of power lines and signal lines, grounding of cabinet, etc.|
CE Marking (EC Directive compliance)
Sensor covering material (metal, resin).
Easily affected by noise when the cable is long.
|Almost no effect.|
|Power supply||DC, AC, AC/DC, DC with no polarity, etc.|
Connection method, power supply voltage.
|Depends on the power supply, i.e., DC 2-wire models, DC 3-wire models, AC, etc.|
DC 2-wire models are effective for suppressing current consumption.
|Sensing distance||The Sensing distance must be selected by considering the effects of factors such as the temperature, the sensing object, surrounding objects, and the mounting distance between Sensors. Refer to the set distance in the catalog specifications to determine the proper distance. When high precision sensing is required, use a Separate Amplifier model.|
|Temperature or humidity, or existence of water, oils, chemicals etc.|
Confirm that the degree of protection matches the ambient environment.
|An extra margin must be provided in the Sensing distance when selecting Sensors for use in environments subject tovibration and shock.|
To prevent Sensors from vibrating loose, refer to the catalog values for tightening torque during assembly.
|Assembly||Effects of tightening torque, Sensor size, number of wiring steps, cable length, distance between Sensors, surrounding objects.|
Check the effects of surrounding metallic and other objects, and the specifications for the mutual interference between Sensors.