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PROXIMITY SWITCHES

In all automated processes sensors are absolutely necessary to provide the PLC with information. They supply the necessary signals on positions, limits or serve as pulse pick-ups for counting tasks or for monitoring rotational speed. Inductive & Capacitive Proximity Switches are useful in industries for non-contact operation free from any wear & tear with high switching frequencies and accuracy. They are insensitive to vibration, dust & moisture. Inductive Sensors detect all metals without contact. Capacitive Sensors detect almost all solid and liquid media such as metal, glass, wood, plastic, water, oil etc.

Operating Principle Of Inductive Proximity Switches

Inductive Proximity Switches take advantage of the physical effect of the change in the quality factor in a resonant circuit caused by eddy current losses in conductive materials. This is how it works: ALC tuned circuit generates a high frequency electromagnetic field. This field is radiated from the active face of the oscillator. This reduce the oscillation amplitude. The change is converted into a switching signal. The operating principle permits detection of all metals irrespective of whether they are moving or not. Important: the high frequency field causes no measurable heat in the object nor is there any magnetic interference. The operation of the sensors is without interaction.
The distance to the active face at which an electrically conductive material causes a change of signal in the sensor is called sensing range. The sensing range of an Inductive Proximity Switch is defined by means of a target of mild steel (Fe 360). If the switch is damped by other metals, e.g. aluminium or copper, this is reduced. Using correction factors for every kind of metal the user can calculate the attainable sensing ranges.

AC Indcutive Proximity Switch
AC M18   MIA-O1208-LWN   MIA-O3025-LWN
AC Inductive Proximity Switch - Shiva Make
Analog Indcutive Proximity Switch
Current Analog m12-10   Current Analog M18
Current Analog M30   Current Analog Q40   M8  
DC High Temperature Indcutive Proximity Switch
High Pressure M12   High Pressure M30
Long Range DC Indcutive Proximity Switch
Box Type   M6.5   M8   M12   M18   M30  
DC Inductive Proximity Switch - Shiva Make
DC Metal Face Indcutive Proximity Switch
METAL FACE M8 WITH CONN.   METAL FACE M8
METAL FACE M12 06   METAL FACE M12   METAL FACE M18   METAL FACE M30   METAL FACE M83.5  
DC Ultra - Mini Indcutive Proximity Switch
M4   M5   MID-PO0301-LWN  
Indcutive Proximity Switch
NAMUR 4MM   NAMUR 6.5MM   NAMUR 12MM   NAMUR 18MM   NAMUR 30MM   NAMUR Q40  
Safety Curtain
Safety Curtain  
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