Magnetic proximity sensors

Magnetic proximity sensors are characterized by the possibility of large switching distances, available from sensors with small dimensions. They detect magnetic objects (usually permanent magnets) which are used to trigger the switching process. 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.

Magnetic sensors have a broad range of applications. For example:

* object detection through plastic containers/pipes

* object detection in aggressive media through protective Teflon walls

* object detection in high-temperature areas

* pig technology

* recognition of coding using magnets

** refers to devices embedded in non-magnetic materials with magnet M 4.0 (see accessories)

MM 12
Accessories round connectors / magnets
Connection type cable, connector M 12 x 1
Continuous current (mA) <=300
Dimensions without / with connector (mm) M 12 x 1; L=50/62.5
Electrical type DC 3-wire conductor; NAMUR EN 50 227
Housing material brass, nickel-plated
Operating voltage (V) 10 ... 30 DC
Output function shutter
Protection - power-up pulse suppression yes
Protection - reverse polarity yes
Protection - short-circuit yes
Protection - wire-break yes
Protection category IP67
Sensing range s (mm)** 60
Switching frequency (Hz) 5000
Switching outputs PNP/NPN

MM 18
Accessories round connectors / magnets
Connection type cable, connector M 12 x 1
Continuous current (mA) <=300
Dimensions without / with connector (mm) M 18 x 1; L=50/65
Electrical type DC 3-wire conductor; NAMUR EN 50 227
Housing material brass, nickel-plated
Operating voltage (V) 10 ... 30 DC
Output function shutter
Protection - power-up pulse suppression yes
Protection - reverse polarity yes
Protection - short-circuit yes
Protection - wire-break yes
Protection category IP67
Sensing ranges s (mm) 70
Switching frequency (Hz) 5000