Proximity sensors detect the presence of objects without physical contact. Since 1983 Fargo Controls’ proximity sensors have been of the highest quality, durability & repeatability to meet today's tough industrial requirements. We provide a wide range of proximity sensors to meet all types of applications.
Typical applications include the detection, position, inspection and counting on automated machines and manufacturing systems. They are also used in the following machinery: packaging, production, printing, plastic molding, metal working, food processing, etc
Please visit our News page for our latest proximity sensors additions.
To learn how inductive, capacitive, magnetic and photoelectric sensors work please visit How Proximity Sensors Work page
To
speak with an application engineer please call (732) 982-2247
Inductive Sensors
Detection of metallic objects
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Capacitive Sensors
Detection of metallic and non-metallic objects (Liquids, plastics, woods)
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Photoelectric Sensors
Use light sensitive elements to detect objects
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AC, DC
Direct
Reflection
Reflection
with Reflector
Thru
Beam
Adjustable Operating Distances
Programmable
Output Function
DC NPN/PNP NO+NC Selectable
AC
NO/NC Selectable |
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Magnetic Sensors
Detects the presence of permanent magnets
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Hermetically sealed
Large
Operating Distances
NO,
NO+NC |
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* All sensors are CE compliant.
30 day Test
& Evaluation:
Any standard unit in our Proximity Sensor Catalog is available for
test and evaluation. Request
catalog for details.
ACCESSORIES
Power Suppliers & Amplifiers Timing Controls Rotation
Controls
Connectors
for Proximity Sensors
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OPERATING PRINCIPLES
How do proximity sensors work?
Inductive
& Capacitive
Their operating principle is based on a high frequency oscillator
that creates a field in the close surroundings of the sensing surface.
The presence of a metallic object (inductive) or any material (capacitive)
in the operating area causes a change of the oscillation amplitude.
The rise or fall of such oscillation is identified by a threshold
circuit that changes the output state of the sensor. The operating
distance of the sensor depends on the actuator's shape and size
and is strictly linked to the nature of the material (Table 1 &
Table 2.). A screw placed on the back of the capacitive sensor allows
regulation of the operating distance. This sensitivity regulation
is useful in applications, such as detection of full containers
and non-detection of empty containers.
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Table 1: INDUCTIVE SENSORS
Sensitivity when different metals are present.
Sn = operating distance.
Fe37 (iron)
Stainless steel
Brass- bronze
Aluminum
Copper |
1 x Sn
0.9 x Sn
0.5 x Sn
0.4 x Sn
0.4 x Sn |
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Table 2: CAPACITIVE SENSORS
Sensitivity when different materials are present.
Sn = operating distance.
Metal
Water
Plastic
Glass
Wood |
1 x Sn
1 x Sn
0.5 x Sn
0.5 x Sn
0.4 x Sn |
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Photoelectric
These sensors use light sensitive elements to detect objects and are made up of an emitter (light source) and a receiver. Three types of photoelectric sensors are available. Direct Reflection - emitter and receiver are housed together and uses the light reflected directly off the object for detection. Reflection with Reflector - emitter and receiver are housed together and requires a reflector. An object is detected when it interrupts the light beam between the sensor and reflector. Thru Beam - emitter and receiver are housed separately and detects an object when it interrupts the light beam between the emitter and receiver.
Magnetic
Magnetic sensors are actuated by the presence of a permanent magnet. Their operating principle is based on the use of reed contacts, which consist of two low reluctance ferro-magnetic reeds enclosed in glass bulbs containing inert gas. The reciprocal attraction of both reeds in the presence of a magnetic field, due to magnetic induction, establishes an electrical contact. |
Fargo Controls offers competitive cross references for proximity sensors made by Allen-Bradley, Balluff, Baumer Electric, Carlo Gavazzi, Cutler-Hammer, ifm efector, Namco Controls, Omron, Pepperl+Fuchs, SICK, Square D, Telemecanique, TURCK, and a number of other manufactures. Please contact us at (732) 982-2247 to obtain our equivalent. |
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