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Sensors & Instrumentation - Proximity Sensors - Magnetic Proximity Sensors


Magnetic Sensors:- Magnetic proximity sensors are characterised 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.
Proximity sensing is the technique of detecting the presence or absence of an object using a critical distance. A position sensor determines an object's coordinates (linear or angular) with respect to a reference, displacement means moving from one position to another for a specified distance (or angle). In effect, a proximity sensor is a threshold version of a position sensor.


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 MD2002 Series

MD2002 Series
Magnetic proximity sensors are characterized by the possibility of large switching distances, available from sensors with small dimensions. They detect a magnetic object (usually a permanent magnet), 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.

Proximity sensing is the technique of detecting the presence or absence of an object using a critical distance.

A position sensor determines an object's coordinates (linear or angular) with respect to a reference, displacement means moving from one position to another for a specified distance (or angle). In effect, a proximity sensor is a threshold version of a position sensor.

Bee Instruments 3 Wire- DC Magnetic Sensors
FormatModelsDimensionsSensing RangeOutput Logic
Ph Hassan on 09 630 7871 and request a catalogue
MD2001BEE7051-100-11-11121 M12x1.0Px65L 1mm NC
MD2002 BEE7051-100-11-11181 M18x1.0Px65L 3mm NC
MD2003 BEE7053-500-00-42280 28x18x6 10mm NC
MD2004 BEE7053-500-00-42780 7x8x30 10mm NC
MD2005 BEE7053-500-00-42680 68x35x12 10mm NC


Technical Details
Series SW 705 / SW 715 / MSP 706 / MSP 716 / MSP 707 / MSP 717
The series SW 705 Magnetic Proximity Switches are available in two broad categories.
  1.   Position sensing switches with Reed Element.
  2.  2-Wire / 3-Wire Magnetic pick-up Sensors.
These switches are available in different shapes and sizes.
Tubular models are available in Brass/SS enclosures in sizes M12, M18 and M30 and above.
Switches with Reed Element:
These switches are used only for position sensing application. These incorporate a hermetically sealed sensitive reed element. The object should necessarily be a magnet. These are provided with 2-core built-in cable. The output is a potential free contact and can switch external load directly.
The switching voltage and contact rating depends upon switch size. Special models of latching type switches are available for direction sensing applications.

GENERAL SPECIFICATIONS:
Sensing Range : 10 to 50 mm depending upon Strength of object magnet.
Termination : Integrated 2/3-core cable.
Load : 500 mA Max.
Object : Magnet.
Operating Temp : 70°C / 200°C.
Protection Grade : IP-67.
Position sensing in hydraulic cylinders.
Roto-meters.
Direction sensing applications.
Level sensing of liquids.

MAGNETIC PICK-UP SENSORS:(Series MSP 706 / MSP 716)

HALL EFFECT SENSORS:(Series MSP 707 / MSP 717)
These sensors can be used only for sensing motion of a ferrous object e.g. Gear Wheel. These incorporate a special high strength ALNICO
Magnet with a properly designed coil. Special high frequency sensors incorporate a Hall effect sensor.
These switches are available in 2/3-wire design. The 3-wire type switches have output logic / operating voltages similar to other types of switches described earlier.
The 2-wire switches should be necessarily used with a special controller / amplifier unit.

APPLICATION IDEAS:
Turbine high-speed sensor.
Bucket Elevator high temperature sensor.

AUTOMOBILE SENSORS:
Special / custom built models are available for Automotive and Off Road vehicles. Call for information.
1.BEE7071-NO-D2-BF10 ... [more details]
BEE INSTRUMENTS magnetic proximity switch, MD2002 case, normally open (NO), 5Vdc supply, 50mA load current 1.5mm sensing distance, Nickel plated brass tube, M10x65 case, Flush type, 3 core teflon 2m cable-19/40, -5°C to +150°C, IP67.