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	Hall effect sensor - Wikipedia, the free encyclopedia
		A Hall effect sensor is a transducer that varies its output voltage in response to changes in magnetic field density.
		Typically, the sensor is integrated with a wound core or permanent magnet that surrounds the conductor to be measured.
		Hall sensors are commonly used to time the speed of wheels and shafts, such as for internal combustion engine ignition timing or tachometers.
	en.wikipedia.org /wiki/Hall_effect_sensor (333 words)

	Micronas: Hall Effect Sensor
		The function of a Hall sensor is based on the physical principle of the Hall effect named after its discoverer E. Hall: It means that a voltage is generated transversely to the current flow direction in an electric conductor (the Hall voltage), if a magnetic field is applied perpendicularly to the conductor.
		The Hall effect: In a semiconductive platelet, the Hall voltage is generated by the effect of an external magnetic field acting perpendicularly to the direction of the current.
		This sensor element detects the components of the magnetic flux perpendicular to the surface of the chip and emits a proportional electrical signal which is processed in the evaluation circuits integrated on the sensor chip.
	www.angelfire.com /ab6/userper/hall_sensor.htm (1835 words)

	Sensor Type
		Two sensor types, induction coils and magnetic field sensors, are commonly used to measure the magnetic field or flux density.
		Hall-effect sensors are also temperature sensitive, with a drift in output voltage on the order of a tenth of a percent per degree Celsius (-0.06 percent/degree F).
		The sensor system consists of the sensors themselves, the mounting system used to support the sensors, wear plates between the sensors and the pipe, and cabling between the sensors.
	www.battelle.org /pipetechnology/MFL/Links/SensorType.htm (1160 words)

	Hall Sensor Technical Supplement and FAQ
		The sensing distance between the sensor and a geartooth is influenced many factors including the gear teeth dimensions, the grade of ferrous metal of the gear and alignment of sensor to gear.
		Hall effect geartooth sensing makes use of the Hall element to sense the variation in flux found in the air gap between a magnet and passing ferrous geartooth.
		The sensor is activated (output lead conducting to ground) by the South pole and deactivated by the North pole.
	www.dicomse.com.ar /hamlin/hall_sensor_technical_supplement.htm (2411 words)

	Hall effect - SensorWiki
		The hall voltage is directly proportional to the strength of the magnetic field.
		Note that the field strength, and thus the voltage, is not linearly related to the distance between the sensor and the source of the magnetic field (i.e.
		Linear devices and also be used as tilt sensors as the magnetic field strength varies with the projection in the transverse axis.
	www.sensorwiki.org /index.php/Hall_effect (695 words)

	Noncontact Hall-Effect Position Sensor for Harsh Environments
		The sensor is constructed so that a magnet is rotated around a Hall-effect IC at the center of rotation of a standard potentiometer-type housing.
		The changing magnetic field causes the output of the Hall device to swing from 0.5 to 4.5 V. Standard units require an input voltage of 5 V DC ±10 percent.
		This sensor design was created by the Advanced Development Group at Spectrol Electronics Corp., 4051 Greystone Drive, Ontario, CA 91761, and colleagues from both Spectrol and Wabash Technologies, Inc., of which the former is a unit.
	www.nasatech.com /Briefs/Oct99/MOC10991.html (449 words)

	Hall Effect Sensor
		The Hall Effect sensor is a magnetic field sensor.
		The effect is based on charges that move through a semiconductor but the charges are deflected by a magnetic field.
		Thus, the Hall voltage that is generated is only related to four parameters - the current flowing through the Hall element, the resistance of the Hall element, the mobility of the Hall element and the field perpendicular to the Hall element.
	www.ece.ubc.ca /~victorl/oldweb/hall_effect_sensor.htm (787 words)

	One-step buttonholer with hall effect sensor - Patent 4232617
		A Hall Effect sensor switch interacts with a lever, which engages adjustable spots on a buttonhole gaging presser foot, to provide signals for electronic circuit logic indicating the end of a buttonhole being sewn.
		The sensor 66 is coupled to an operational amplifier 100 which outputs to one of the inputs of an AND gate 102 which, in turn, is coupled to a one shot multivibrator 104.
		In general, a standard electrical switch in place of the Hall Effect sensor 66 would require at least two connections to the electronic logic circuitry, which may be in the form of an LSI chip.
	www.freepatentsonline.com /4232617.html (1910 words)

	How It Works: Hall Effect Motor
		The Hall effect IC used in Kits 6 and 8 (or available as a separate part) is a unipolar switch.
		This Hall effect IC has a built in voltage regulator and may work in the range from 4.5 to 24V.
		The magnetic field of the additional magnet placed near the Hall effect IC interacts with the magnetic field of the magnets on the rotor.
	www.simplemotor.com /hemotor.htm (746 words)

	04.09.98 Hall-Effect Sensor ICs Sport Magnetic Personalities
		Tolerance buildup is the sum of all the variables that determine the operate and release points of a Hall IC: position tolerance, temperature coefficient, assembly wear and aging, and magnet variations.
		Use a ratiometric linear Hall sensor with a ratiometric ADC for optimum linearity.
		NT sensors use a bus-bar conductor and a geometric network that measures magnetic-field strengths and gradients.
	www.edn.com /archives/1998/040998/08df_01.htm (2596 words)

	hall sensor trigger setup
		This article gives applied hall sensor information, and is a useful read for anyone seeking to understand the function of a hall sensor / multitooth trigger wheel relationship for crank based timing.
		In operation both hall-effect sensors use a change in magnetic field to produce a voltage signal, but the difference to note is they have opposite outputs when in air or passing metal.
		For the GT101, the Hall goes from 5 V air to ~0 V over the metal tooth, hence the electrical signal is falling edge (detected on the leading edge of the tooth), and rising edge again (as it leaves the tooth's trailing edge).
	wwwrsphysse.anu.edu.au /~amh110/Technical_pages/hall_sensor_trigger.htm (1444 words)

	Hall Effect Crankshaft Sensor Diagnostics Tightrope Technologies Ireland
		The Hall effect type crankshaft sensor is a simple digital 'on / off' switch which produces a digital output that is recognised and processed by the ECM.
		The sensor is trigged by a rotating metal disc with openings, the disc passes between the electromagnet and the semiconductor.
		The effect of a magnetic field that is able to pass through one of the 'windows' will stop the flow of voltage.
	www.ttmtechnical.com /crankshaft_sensor_hall_effect.html (394 words)

	The Hall-Effect Sensor (Site not responding. Last check: 2007-10-21)
		Some Hall Sensors use a moving magnet attached to a timing chain sprocket (GM) or notches in the flex plate (Chrysler) to generate a signal.
		The sensor was located in the distributor and the shutter was part of the rotor assembly.
		These Hall Sensors work from an 8 volt power supply and the output is a 5 volt-0 volt signal to the Engine Controller (EC).
	www.kemparts.com /TechTalk/tt10.asp (719 words)

	HALL SENSORS - Cryogenic Hall Generators and Probes - HALL EFFECT SENSOR - Lake Shore Cryotronics, Inc
		A Hall generator is a solid state sensor which provides an output voltage proportional to magnetic flux density.
		The Hall effect is the development of a voltage across a sheet of conductor when current is flowing and the conductor is placed in a magnetic field.
		Due to the shorting effect of the current supply contacts, most of the sensitivity to magnetic fields is contained in an area approximated by a circle, centered in the Hall plate, whose diameter is equal to the plate width.
	www.lakeshore.com /mag/mas/msm.html (435 words)

	Second Hall Effect Sensor for an Airhead
		The sensor part of this unit can fail without warning but if a second sensor is fitted then by simply changing a connection you can continue with your trip.
		The second hall effect sensor is cheap and light (10 grams, add 20 for wires, connectors, silastic and cable ties), but not easy to fit.
		The bottom sensor plate holes should be enlarged to enable the sensor rivets to be penned over, be careful not to damage the smaller holes in the top sensor plate.
	www.geocities.com /fwarner_au/mc_things/bmwr_ign_sensor.html (2119 words)

	Hall-Effect Sensors
		Allegro's sensors are based on Hall-effect technology, which allows contactless sensing devoid of mechanical wear, sensing either an external magnet or a ferrous object.
		Specifically, Hall-effect sensors are used for highly accurate gear-tooth sensing, direction detection, linear sensing, speed sensing, position sensing and contactless switching.
		The direction-detection Hall-effect sensor is a new generation of special function integrated sensors that are capable of sensing the direction of rotation of a ring magnet.
	www.allegromicro.com /hall (664 words)

	Hall effect - Wikipedia, the free encyclopedia
		Hall probes are used to measure magnetic fields, and make use of the Hall effect.
		By sensing the current provided to a load and using the device's applied voltage as a sensor voltage it is possible to determine the power dissipated by a device.
		Accurate and efficient management of all aspects of energy is a critical aspect of any successful solar car - Hall effect current transducers are an ideal solution due to their high accuracy, environmental hardiness and low power consumption.
	en.wikipedia.org /wiki/Hall_effect (1702 words)

	Sensors International
		Sensors International sells custom designed sensor control boards to fit the needs of your project.
		Sensors International can provide your company with variable reluctance, hall effect, and speed sensors that exactly match the applications for which they are needed.
		We sell analog variable reluctance sensors with an effective range of operation from 20 inches per second (the angular velocity of the ferros gear teeth) to several hundred inches per second.
	www.sensorsinternational.com (186 words)

	A Hall Effect Rotation Sensor: (Site not responding. Last check: 2007-10-21)
		Notice that the sensor end of the brick is filed slightly to clear the magnet wheel.
		The heart of it is a quadrature hall effect sensor P/N A3425LK from Allegro (www.allegro.com).
		Note that the sensor can also be used as a linear position sensor by moving it along a long flat strip of fridge magnet.
	www.plazaearth.com /usr/gasperi/hallrotate.htm (340 words)

	Micronas HAL 810 Programmable Linear Hall Effect Sensor Product Information
		The HAL 810 is a universal magnetic field sensor with a linear output based on the Hall effect.
		The sensor is designed for hostile industrial and automotive applications and operates with a supply voltage of typically 5 V in the ambient temperature range from -40 °C up to 150 °C. The HAL 810 is available in the very small leaded packages TO92UT-1 and TO92UT-2.
		The Hall IC is sensitive to magnetic north and south polarity.
	www.micronasusa.com /products/by_function/hal_810/index.html (641 words)

	Hall Effect Sensors
		Hall effect devices are digital On/Off sensors constructed of semiconductor material used to sense the presence of magnetic fields.
		In brushless servo motors, the halls are usually imbedded within the motor windings and sense the position of the rotor magnets.
		There is one sensor for each motor phase, aligned with the stator winding.
	www.motionvillage.com /training/handbook/feedback/hallsensors.html (134 words)

	Speed Sensor, Hall Effect Sensor FAQ - Cherry
		A: A Cherry geartooth sensor is a solid state device with no moving parts, so its operational life is virtually unlimited.
		Ferrous vane sensors are immune to dust, dirt and grease.
		Cherry reed sensors are not solid state devices, and they're immune to ESD.
	www.cherrycorp.com /english/sensors/sensorfaqs.htm (2321 words)

	Hall Effect Gear Tooth Sensor or Ferrous Object Position Sensor Construction Methods
		This position sensor can be built using either a Hall Effect Latch or Switch IC.
		The object of these instructions is to enable one to build a functional Hall Effect position sensor that can be used for a school lab project, robotic hobby project, or just to learn how a Hall Effect sensor works.
		Figure One: The basic magnetic circuit that will be used to build a Hall Effect gear tooth sensor or a Ferrous Object sensor which will detect a passing steel bolt head.
	www.luetzow.us /S_SensorTitlePage.html (266 words)

	Vishay Spectrol Hall Effect Rotary Position Sensor
		The Model RPS sensor features a bush-and-shaft configuration — with mass and dimensions similar to most contacting potentiometers - in which a Hall Effect IC is mounted.
		The sensor is specified for a maximum output of 2 mA (source or sink), a typical supply current of 5 mA, and maximum over- and reverse-voltage protection of 18 VDC and -14.5 VDC, respectively.
		The sensor is constructed in a stainless steel canister with a flatted or slotted shaft and with solder lugs or wire leads.
	www.vishay.com /company/press/releases/2002/020617sensor (503 words)

	Magnetic Position Sensors - Sensing and Control - Honeywell Automation and Control Solutions (Site not responding. Last check: 2007-10-21)
		Magnetic Position Sensors are reliable, high speed, long life, sensors and are directly compatible with other electronic circuits.
		These sensors respond to the presence or the interruption of a magnetic field by producing either a digital or an analog output proportional to the magnetic field strength.
		Integral magnet position sensors are operated by either a vane passing through a gap or a magnet mounted on a plastic plunger.
	content.honeywell.com /sensing/prodinfo/solidstate (256 words)

	Infineon Introduces Intelligent Wheel Speed Hall Effect Sensor
		The integrated Hall Effect Sensor is based on the Hall effect, named after its discoverer Edwin Hall in 1879.
		The Hall Effect Sensor is virtually immune to environmental contaminants and is suitable for use under severe conditions.
		By using standard bipolar IC technologies it is possible to create and process integrated Hall Effect Sensors resulting in very cost-effective solutions to a wide variety of sensing tasks.
	www.theautochannel.com /news/press/date/20000509/press015081.html (586 words)

	Capacitive Sensor (Site not responding. Last check: 2007-10-21)
		The effect is based on the interaction between moving electric carriers and an external magnetic field.
		The sign and amplitude of the transverse Hall potential difference VH depends on both magnitude and directions of magnetic field and electric current.
		The Hall effect sensor can be used to measure fuel level in a fuel tank (Fig.
	www.mfg.mtu.edu /cyberman/machtool/machtool/sensors/magnetic.html (216 words)

	Flowmeter Circuit with Hall Effect Sensor
		The Hall Effect Sensor serves as a simple, but versatile sensor for Flow Technology flowmeters.
		The magnets in the impellers of a flowmeter trigger the latching circuit in the sensor, which in turn transmits a square wave pulse to any connected signal conditioner, monitoring device, or controller.
		Simply screw the sensor body into a Flow Technology flowmeter, plug in the cable, and lock firmly in place with a few twists of the connector coupling nut.
	www.ftimeters.com /pages/product/ps910qd.html (199 words)

	Hall effect sensor on speedo - Club Cobra (Site not responding. Last check: 2007-10-21)
		About once a year I have to disconnect the hall effect sensor from the speedometer because the guage will start reading 50 or 60 mph when I turn the key on.
		Seems strange it is intermittent and unplugging the transmitter (hall effect) clears it up for a time.
		I have used the VDO Electronic Speedometer and Hall Effect Sensor since 1998 and have never had any problem at all with it.
	www.clubcobra.com /t45451.html (1031 words)

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