Hall (Magnetic) Sensors
Our partnerLake Shore Cryotronics

Hall (Magnetic) Sensors

From Lake Shore Cryotronics

Hall effect sensors are measuring or detecting magnetic fields electronically. They are providing an output voltage proportional to the magnetic flux density. This device relies on the Hall effect. 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. We offer a range of Hall sensors for various applications. In all cases, these sensors go beyond the application of simple magnetic presence detection such as those used in encoders, contactless switches, and electronic compasses. Lake Shore sensors are useful for field measurement applications, where field value, direction, and polarity are of interest.

Features
  • Single or 3-axis configurations
  • Wide operating temperature range
  • Plug-and-play version available for teslameters and gaussmeters

Further information

A Hall sensor is a 4-lead device. The control current (IC) leads are normally attached to a current source such as the Lake Shore Model 121. The Model 121 provides several fixed current values compatible with various Hall sensors.

The Hall voltage leads may be connected directly to a readout instrument, such as a high impedance voltmeter, or can be attached to electronic circuitry for amplification or conditioning. Device signal levels will be in the range of microvolts to hundreds of millivolts.

The Hall sensor input is not isolated from its output. In fact, impedance levels on the order of the input resistance are all that generally exist between the two ports. To prevent erroneous current paths, which can cause large error voltages, the current supply must be isolated from the output display or the downstream electronics.

 

2Dex

InAs—stable

InAs—sensitive

GaAs

What makes this work?
Words to impress your boss

Thin-film technology using a 2‑dimensional electron gas (2DEG) structure

Indium arsenide bulk material, doped for high stability

Indium arsenide bulk material, doped for high sensitivity

Gallium arsenide thin film

Temperature range
An advantage of non-silicon-based Hall sensors is the opportunity for use in more extreme temperatures

1 K to 402 K
(-272 °C to 125 °C)

1.5 K to 375 K
(-271.5 °C to 102 °C)

208 K to 373 K
(-65 °C to 100 °C)

233 K to 402 K
(-40 °C to 125 °C)

Interchangeability
Ability to operate multiple sensors with identical drive and measurement setups

Good—narrow range of sensitivity values, excellent linearity, and small offset voltage

Poor—sensitivity range is large enough to require knowledge of the average sensitivity value

Poor—sensitivity range is large enough to require knowledge of the average sensitivity value

Poor—sensitivity range is large enough to require knowledge of the average sensitivity value

Ruggedness
Ability to survive shock and vibration

Good

Poor

Poor

Good

Lake Shore instrument compatibility
Gaussmeter/teslameter compatibility for these sensors, allowing for field values to automatically be displayed by the instrument

F71 or F41 teslameter with plug-and-play sensors—full sensor calibration and temperature compensation providing accuracy equivalent to a full teslameter probe

425 or 475 gaussmeter using HMCBL cable; field conversion accomplished with single sensitivity value only, meaning linearity and temperature compensation is not carried out by the gaussmeter

425 or 475 gaussmeter using HMCBL cable; field conversion accomplished with single sensitivity value only, meaning linearity and temperature compensation is not carried out by the gaussmeter

None

Planar Hall effect
Physical property related to Hall element thickness that introduces measurement error when the field is in-plane with the sensor element

None, making these sensors ideal for measuring fields with unknown orientation

Significant—bulk material produces enough of a planar Hall effect that fields with known directions are required for accurate measurements

Significant—bulk material produces enough of a planar Hall effect that fields with known directions are required for accurate measurements

Some—thin film elements may exhibit small amounts of planar Hall effect error

Sensitivity at nominal current
Impacts measurement accuracy and resolution—a higher number is better

50.5 to 52.5 mV/T

5.5 to 11 mV/T

55 to 125 mV/T

110 to 280 mV/T

Sensitivity temperature coefficient
Impacts accuracy during large temperature shifts

200 ppm/°C

50 ppm/°C

800 ppm/°C

600 ppm/°C

Nominal drive current
The recommended excitation level for these sensors

1 mA

100 mA

100 mA

1 mA

Typical input resistance
Useful when selecting the drive circuit

800 Ω

2 Ω

2 Ω

750 Ω

Typical input resistance temperature coefficient
An additional source of measurement error if using a voltage source (rather than current source) to power the sensor

0.7%/°C

0.15%/°C

0.18%/°C

0.2%/°C

Best offset voltage (field equivalent)
An error component that has a bigger impact at small fields

±25 µV (0.5 mT)

±50 µV (4.5 mT)

±75 µV (0.6 mT)

±2.8 mV (10 mT)

Specification

2Dex™ Hall Sensors

  • Multiple package types
  • Small active areas
  • Single or 3-axis configurations
  • Suitable for extreme environments (temperature, radiation, vacuum)
  • Plug-and-play version available for direct connection to Lake Shore F71/F41 teslameters

2Dex™ Plug-and-Play Hall Sensors

  • Multiple package types
  • Small active areas
  • Single or 3-axis configurations
  • Plug-and-play sensors
  • Inline connector
  • Easy extension

InAs and GaAs Hall Sensors

  • Multiple packages available
  • Options for high stability or sensitivity
  • Compatible with Lake Shore 400 Series gaussmeters

Downloads

2Dex Hall sensors
2Dex Hall sensors
Magnetic field sensors Hall generators
Magnetic field sensors Hall generators

Contact

Stephane Struyve
Stephane Struyve

Contact

Quantum Design GmbH

Meerstraat 177
B-1852 Grimbergen
Belgium

Phone+32 230 84324
Mobil:+32 495 797175
E-mail:benelux@qd-europe.com
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Stephane StruyveSales Manager
+32 2 3084324
stephane.struyve@qd-europe.com