Proximity Sensors
Capacitive Proximity Sensors
Capacitive proximity sensors are ideal for level measurement and
product presence verification. The capacitive sensors are fully potted for
improved vibration resistance; increased shock resistance and IP 67 wash down
protection. Capacitive sensors can detect non-metallic objects and they have
enhanced sensing ranges for high operational reliability.
Applications include:
- Monitoring filling heights
- Presence detection
- Position detection
Inductive Proximity Sensors
Our family of inductive sensors detect metallic objects and
are suitable for a wide variety of applications such as position polling,
transport monitoring, counting pulse generation, speed monitoring and speed
direction detection. Inductive sensors are very flexible due to the various
housing shapes and sizes.
How inductive sensors work:
An inductive proximity sensor comprises an LC oscillating
circuit, a signal evaluator, and a switching amplifier.
The coil of this oscillating circuit generates a high-frequency
electromagnetic alternating field. This field is emitted at the sensing face of
the sensor. If a metallic object (switching trigger) nears the sensing face,
eddy currents are generated. The resultant losses draw energy from the
oscillating circuit and reduce the oscillations. The signal evaluator behind
the LC oscillating circuit converts this information into a clear signal.
High switching frequencies and high continuous currents
characterize many SICK inductive sensors. They are available as DC 3/4-wire
conductors, DC 2-wire conductors, AC/DC 2-wire conductors, and NAMUR sensors in
accordance with EN 50 227.
Applications include:
- Position polling
- Transport monitoring
- Speed monitoring
- Feed and ejection control
- Count pulse generation
Magnetic Proximity Sensors
Magnetic proximity sensors are characterized by their large
sensing ranges. They detect magnetic objects (usually permanent objects) which
are used to trigger the switching process. Magnetic proximity sensors are ideal
for object detection through plastic containers and pipes, detection in
aggressive media through protective Teflon walls and detection in high
temperature areas.
As the magnetic fields are able to pass through many non-magnetic
materials, the switching process can also be triggered without the need for
direct exposure to the target object. By using magnetic conductors (e.g. iron),
the magnetic field can be transmitted over greater distances so that, for
example, the signal can be carried away from high temperature areas.
Applications include:
- Object detection through plastic containers/pipes
- Object detection in aggressive media through protective Teflonwalls
- Object detection in high temperature areas
- Recognition of coding using magnets
Magnetic Cylinder Sensors
SICK offers special magnetic cylinder sensors used to detect
the position of pistons in pneumatic cylinders. They are attached directly to
the piston through the housing wall, which could be made of aluminium, brass,
or stainless steel. They reliably detect a magnetic ring in the piston through
the housing wall made of aluminum, brass or stainless steel and then trigger
a switching signal.
SICK magnetic cylinder sensors are fully electronic and are
encapsulated in special housings which can be attached simply to the pneumatic
cylinders. Since they have no switching contacts or moving parts, the sensors
are extremely reliable, even in applications involving severe vibration and
shock stress.
They are characterized by high sensitivity and switching
accuracy, in addition to practical mounting technology for all current pneumatic
cylinders.
Applications include:
- Detection of piston position
- Detection of piston position in weld field environments
Ultrasonic Sensors
Light and sound are two natural phenomena which let every living
being recognize their environment without physical contact and over widely
varying distances. Likewise, industrial processes require reliable environmental
information. SICK’s ultrasonic sensors UM 30 and UM 18 detect objects and
measure distances with high accuracy. The realm of sound is a world of its own,
and for this reason ultrasonic sensors are simply the better choice in many
industrial applications requiring sensor technology.
Ultrasonics Features
- Color independent
- Independent of shape and surface
- Detection of liquids, foils and glass
- Stable in harsh environments
- Optimum solution for double sheet
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