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Magnetic v2.1 (obsolete)

This sensor will show you the mysteries of magnetism. Measures upto 15 Oersted (which is 15 Gauss, if measuring in air). Comes with a couple of those super strong neodymium magnets. See this videoclip for a demo !

Application examples

  1. Measure proximity of magnetic objects.
  2. Attach to doors and detect when they are (almost) closed.
  3. Measure the strength of the earth's magnetic field.

Technical specifications

Product Magnetic sensor
Version 2.1 (November 2009)
Sensing parameter magnetic field strength
Sensing method Hall effect
Range 0 to 15 Oersted, linear between 1.5 and 10.5 Oersted, saturation at 15 Oersted (1 Oersted = 1 Gauss, in air)
Non-linearity 2 % minimum
Hysteresis 4 % minimum
Bandwidth 0 - 1 MHz
Power supply 3 to 5.25 V DC, 3.6 mA at 5 V DC
Operating temperature -50 to 125 °C (-22 to 257 °F)
Sensor dimensions 30.0 x 10.0 x 4.50 (1.18 x 0.394 x 0.177 inch)
Weight 11 g (0.39 oz), incl. cable
Cable 1.0 m (39 inch), shielded, red wire = power, black wire = ground, white wire = sensor output, maximum extension 30 m (98 ft)
Connector male plug with 3 pins in a row spaced 2.54 mm (0.100 inch)
Included magnets Neodymium magnet 10,800 Gauss, 6.4 mm (0.25 inch) diameter x 1.6 mm (0.063 inch) thick; larger neodymium magnets
Calibration with included 10,800 Gauss magnet (approach sensor's center with magnet's center without any material in between, and see application notes below)
cm inch gauss Voltage (use 5 V power supply) 7-bit MIDI value (use 'no processing' editor preset)
0 0 2.4x103 5 127
1.7 0.66 15 5 127
2.0 0.79 9.3 0.71 18
3.0 1.2 2.8 0.33 8
4.0 1.6 1.2 0.27 7
5.0 2.0 0.63 0.25 6
Application notes The earth's magnetic field has to be taken into account when measuring the field strength of magnets, since the strength of the earth's magnetic field at the earth's surface ranges from less than 30 microteslas (0.3 gauss) in an area including most of South America and South Africa to over 60 microteslas (0.6 gauss) around the magnetic poles in northern Canada and south of Australia, and in part of Siberia. The calibration table above includes the earth's magnetic field as measured in Montreal, Canada.

This page was updated on Tuesday 15 July 2014.
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