Diodes Incorporated Magnetic Field Sensors 111

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Part RoHS Manufacturer Sensors or Transducers Type Mounting Feature No. of Terminals Output Type Package Shape or Style Output Range Package Body Material Minimum Range Of Magnetic Field Maximum Supply Voltage Maximum Output Current Technology Screening Level Input Mode Maximum Magnetic Field Range Hysteresis Body Length/Diameter Body Width Power Supplies (V) Output Circuit Type Resistance Package Equivalence Code No. of Axes Sub-Category Linearity (%) Body Height Minimum Supply Voltage Maximum Operating Temperature Response Time Minimum Operating Temperature Sensitivity (mV/G) Terminal Finish Termination Type Output Interface Type Output (V) Maximum Operating Current Output Polarity Additional Features Maximum Measurement Range (mm) Housing JESD-609 Code Operating Frequency Minimum Measurement Range (mm)

AH1885-ZG-7

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

6

ANALOG VOLTAGE

RECTANGULAR

0.2-1.6V

PLASTIC/EPOXY

1.5 mT

3.3 V

CMOS

BIPOLAR

5.9 mT

.8 mT

1.6 mm

1.175 inch

1.8/3

FL6,.047,20

Other Sensors

.585 mm

1.65 V

85 Cel

-40 Cel

MATTE TIN

SOLDER

4 mA

NON-INVERTING

BATTERY OPERATION

e3

AH1886-ZG-7

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

6

ANALOG VOLTAGE

RECTANGULAR

0.2-1.6V

PLASTIC/EPOXY

.6 mT

3.3 V

BIPOLAR

5.5 mT

.8 mT

1.6 mm

1.175 inch

1.8

FL6,.047,20

Other Sensors

.585 mm

1.65 V

85 Cel

-40 Cel

MATTE TIN

SOLDER

4 mA

NON-INVERTING

BATTERY OPERATION

e3

AH1884-ZG-7

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

6

ANALOG VOLTAGE

RECTANGULAR

0.2-1.6V

PLASTIC/EPOXY

1.5 mT

3.3 V

BIPOLAR

5.5 mT

.8 mT

1.6 mm

1.175 inch

1.8/3

FL6,.047,20

Other Sensors

.575 mm

1.65 V

85 Cel

-40 Cel

MATTE TIN

SOLDER

4 mA

NON-INVERTING

BATTERY OPERATION

e3

AH182-PL-B

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

ANALOG VOLTAGE

RECTANGULAR

0.30V

1 mT

5.5 V

10 A

6 mT

1 mT

4.1 mm

1.5 inch

3 mm

2.5 V

85 Cel

-40 Cel

MATTE TIN

SOLDER

.01 mA

e3

AH182-WL-7

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

ANALOG VOLTAGE

RECTANGULAR

0.30V

1 mT

5.5 V

10 A

6 mT

1 mT

3 mm

1.6 inch

1.15 mm

2.5 V

85 Cel

-40 Cel

MATTE TIN

SOLDER

.01 mA

e3

AH266K-PL-B-B

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

4

ANALOG VOLTAGE

RECTANGULAR

PLASTIC/EPOXY

-10 mT

28 V

400 A

BIPOLAR

10 mT

8 mT

5.22 mm

1.55 inch

24

SIP4,.03,50

Other Sensors

3.65 mm

4 V

85 Cel

-20 Cel

MATTE TIN

SOLDER

OPEN-COLLECTOR

10 mA

COMPLEMENTARY

e3

AH1751-PG-B-A

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

ANALOG VOLTAGE

RECTANGULAR

300mV

PLASTIC/EPOXY

-7 mT

20 V

100 A

BIPOLAR

7 mT

7.5 mT

4.1 mm

1.5 inch

3.5/20

SINGLE-ENDED

SIP3,.03,50

Other Sensors

3 mm

3.5 V

125 Cel

-40 Cel

MATTE TIN

SOLDER

SINGLE-ENDED

6 mA

e3

AH180-PL-A-S

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

ANALOG VOLTAGE

RECTANGULAR

0.30V

2 mT

5.5 V

6 mT

1.5 mT

4.1 mm

1.5 inch

3 mm

2.5 V

85 Cel

-40 Cel

MATTE TIN

SOLDER

9 mA

BATTERY OPERATION

e3

AH180-PL-B-S

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

ANALOG VOLTAGE

RECTANGULAR

0.30V

2 mT

5.5 V

6 mT

1.5 mT

4.1 mm

1.5 inch

3 mm

2.5 V

85 Cel

-40 Cel

MATTE TIN

SOLDER

9 mA

BATTERY OPERATION

e3

AH1888-ZG-7

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

6

ANALOG VOLTAGE

RECTANGULAR

0.2-1.6V

PLASTIC/EPOXY

3.5 mT

3.3 V

BIPOLAR

7.9 mT

.8 mT

1.6 mm

1.175 inch

1.8/3

FL6,.047,20

Other Sensors

.585 mm

1.65 V

85 Cel

-40 Cel

MATTE TIN

SOLDER

4 mA

COMPLEMENTARY

BATTERY OPERATION

e3

AH1822-FU4G-7

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

6

ANALOG VOLTAGE

RECTANGULAR

0.30V

PLASTIC/EPOXY

1 mT

5.5 V

BIPOLAR(LATCHED)

5.5 mT

.8 mT

3.01 mm

2.01 inch

3/5

SOLCC6,.12,20

Other Sensors

.4 mm

2.5 V

85 Cel

-40 Cel

NICKEL PALLADIUM GOLD

SOLDER

OPEN-DRAIN

10 mA

NON-INVERTING

BATTERY OPERATION

e4

ZMT32TA

Diodes Incorporated

MAGNETIC FIELD SENSOR,MAGNETORESISTIVE

SURFACE MOUNT

8

ANALOG VOLTAGE

RECTANGULAR

40-60mV

PLASTIC/EPOXY

8.5 V

6.5 mm

3.5 inch

5

SOP8,.28,60

2

Other Sensors

1.7 mm

160 Cel

-40 Cel

MATTE TIN

SOLDER

BRIDGE

8.5 mA

e3

AH180-WG-7-P

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

ANALOG VOLTAGE

RECTANGULAR

0.30V

-3 mT

5.5 V

6 mT

1.5 mT

3 mm

1.6 inch

1.15 mm

2.5 V

85 Cel

-40 Cel

Matte Tin (Sn)

SOLDER

9 mA

e3

AH173-PL-BA

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

ANALOG VOLTAGE

RECTANGULAR

PLASTIC/EPOXY

-6 mT

20 V

25 A

BIPOLAR

6 mT

8 mT

4.1 mm

1.5 inch

12

SIP3,.03,50

Other Sensors/Transducers

3 mm

3 V

125 Cel

-40 Cel

MATTE TIN

SOLDER

PASSIVE PULL-UP

6 mA

INVERTING

e3

AH173-PL-BB

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

ANALOG VOLTAGE

RECTANGULAR

PLASTIC/EPOXY

-8 mT

20 V

25 A

BIPOLAR

8 mT

8 mT

4.1 mm

1.5 inch

12

SIP3,.03,50

Other Sensors/Transducers

3 mm

3 V

125 Cel

-40 Cel

MATTE TIN

SOLDER

PASSIVE PULL-UP

6 mA

INVERTING

e3

AH1888-FJRG-7

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

3

ANALOG VOLTAGE

RECTANGULAR

0.2-1.6V

PLASTIC/EPOXY

3.5 mT

3.3 V

7.9 mT

.8 mT

1.6 mm

1.175 inch

1.8

SOLCC3/6,.09,20

Other Sensors

.585 mm

1.65 V

85 Cel

-40 Cel

NICKEL PALLADIUM GOLD

SOLDER

4 mA

NON-INVERTING

BATTERY OPERATION

e4

AH3765Q-W-7

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

3

PLASTIC/EPOXY

AEC-Q100

3/28

OPEN-DRAIN

TO-236

Other Sensors/Transducers

150 Cel

-40 Cel

MATTE TIN

4 mA

e3

AH3762Q-SA-7

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

3

CURRENT OUTPUT

RECTANGULAR

30-55mA

PLASTIC

-4 mT

28 V

55 A

AEC-Q100

BIPOLAR

4 mT

5 mT

2.9 mm

1.3 inch

TO-236

1.025 mm

3 V

150 Cel

-40 Cel

MATTE TIN

SOLDER

4 mA

e3

AH3762Q-W-7

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

3

CURRENT OUTPUT

RECTANGULAR

30-55mA

PLASTIC

-4 mT

28 V

55 A

AEC-Q100

BIPOLAR

4 mT

5 mT

3 mm

1.6 inch

1.15 mm

3 V

150 Cel

-40 Cel

MATTE TIN

SOLDER

4 mA

e3

AH3362Q-W-7

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

3

CURRENT OUTPUT

RECTANGULAR

30-55mA

.5 mT

28 V

55 A

AEC-Q100

UNIPOLAR

4.5 mT

1 mT

3 mm

1.6 inch

1.1 mm

3 V

150 Cel

-40 Cel

MATTE TIN

SOLDER

OPEN-DRAIN

4 mA

e3

AH3363Q-P-B

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

CURRENT OUTPUT

RECTANGULAR

2 mT

28 V

AEC-Q100

UNIPOLAR

7.2 mT

2 mT

4.1 mm

1.5 inch

OPEN-DRAIN

SIP3,.02,50

3 mm

3 V

150 Cel

-40 Cel

MATTE TIN

SOLDER

OPEN-DRAIN

4 mA

PLASTIC

e3

AH3363Q-SA-7

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

3

CURRENT OUTPUT

RECTANGULAR

2 mT

28 V

AEC-Q100

UNIPOLAR

7.2 mT

2 mT

2.9 mm

1.3 inch

OPEN-DRAIN

TO-236

1 mm

3 V

150 Cel

-40 Cel

MATTE TIN

SOLDER

OPEN-DRAIN

4 mA

PLASTIC

e3

AH3363Q-W-7

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

3

CURRENT OUTPUT

RECTANGULAR

2 mT

28 V

AEC-Q100

UNIPOLAR

7.2 mT

2 mT

3 mm

1.6 inch

OPEN-DRAIN

TSOP3,.11,37

1.1 mm

3 V

150 Cel

-40 Cel

MATTE TIN

SOLDER

OPEN-DRAIN

4 mA

PLASTIC

e3

AH3369Q-P-B

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

CURRENT OUTPUT

RECTANGULAR

30-55mA

12.5 mT

28 V

55 A

AEC-Q100

UNIPOLAR

20 mT

2.5 mT

4.1 mm

1.5 inch

SIP3,.03,50

3 mm

3 V

150 Cel

-40 Cel

MATTE TIN

SOLDER

OPEN-DRAIN

4 mA

LOW SENSITIVITY: BOP AND BRP OF 175G AND 150G TYPICAL

e3

AH3761-PG-B

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

CURRENT OUTPUT

RECTANGULAR

50-90mA

PLASTIC/EPOXY

-6 mT

28 V

90 A

6 mT

6 mT

4.1 mm

1.5 inch

SIP3,.03,50

4.55 mm

3 V

125 Cel

-40 Cel

MATTE TIN

SOLDER

OPEN-DRAIN

6 mA

SEATED HEIGHT-CALCULATED

e3

AH3761-PG-A

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

CURRENT OUTPUT

RECTANGULAR

50-90mA

PLASTIC/EPOXY

-6 mT

28 V

90 A

6 mT

6 mT

4.1 mm

1.935 inch

SIP3,.03

4.55 mm

3 V

125 Cel

-40 Cel

MATTE TIN

SOLDER

OPEN-DRAIN

6 mA

SEATED HEIGHT-CALCULATED

e3

AH175-PG-A-A

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

PLASTIC/EPOXY

-6 mT

BIPOLAR

6 mT

12

SIP3,.03

Other Sensors

125 Cel

-40 Cel

MATTE TIN

OPEN-COLLECTOR

6 mA

NON-INVERTING

e3

ATS177-PG-B-A

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

PLASTIC/EPOXY

-7 mT

BIPOLAR

BIPOLAR(LATCHED)

7 mT

3.5/20

SIP3,.03,50

Other Sensors

85 Cel

-20 Cel

MATTE TIN

OPEN-COLLECTOR

10 mA

NON-INVERTING

e3

AH3765Q-P-A

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

CURRENT OUTPUT

RECTANGULAR

30-55mA

PLASTIC/EPOXY

-9 mT

28 V

55 A

AEC-Q100

9 mT

14 mT

4.1 mm

2.235 inch

3/28

OPEN-DRAIN

SIP3,.03

Other Sensors/Transducers

3 V

150 Cel

-40 Cel

MATTE TIN

SOLDER

4 mA

e3

AH3766Q-P-A

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

CURRENT OUTPUT

RECTANGULAR

30-55mA

-14 mT

28 V

55 A

14 mT

22 mT

4.1 mm

2.235 inch

3 V

150 Cel

-40 Cel

MATTE TIN

SOLDER

4 mA

e3

AH3768Q-P-A

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

CURRENT OUTPUT

RECTANGULAR

30-55mA

-20 mT

28 V

55 A

20 mT

35 mT

4.1 mm

2.235 inch

3 V

150 Cel

-40 Cel

MATTE TIN

SOLDER

4 mA

e3

AH3769Q-P-A

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

CURRENT OUTPUT

RECTANGULAR

30-55mA

-25 mT

28 V

55 A

25 mT

44 mT

4.1 mm

2.235 inch

3 V

150 Cel

-40 Cel

MATTE TIN

SOLDER

4 mA

e3

AH3772-P-A

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

CURRENT OUTPUT

RECTANGULAR

30-55mA

-4 mT

28 V

55 A

4 mT

5 mT

4.1 mm

2.235 inch

3 V

125 Cel

-40 Cel

MATTE TIN

SOLDER

4 mA

e3

AH3775-P-A

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

CURRENT OUTPUT

RECTANGULAR

30-55mA

-9 mT

28 V

55 A

9 mT

14 mT

4.1 mm

2.235 inch

3 V

125 Cel

-40 Cel

MATTE TIN

SOLDER

4 mA

e3

AH3775-P-B

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

CURRENT OUTPUT

RECTANGULAR

30-55mA

-9 mT

28 V

55 A

9 mT

14 mT

4.1 mm

1.5 inch

3 V

125 Cel

-40 Cel

MATTE TIN

SOLDER

4 mA

e3

AH3776-P-A

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

CURRENT OUTPUT

RECTANGULAR

30-55mA

-14 mT

28 V

55 A

14 mT

22 mT

4.1 mm

2.235 inch

3 V

125 Cel

-40 Cel

MATTE TIN

SOLDER

4 mA

e3

AH3776-P-B

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

CURRENT OUTPUT

RECTANGULAR

30-55mA

-14 mT

28 V

55 A

14 mT

22 mT

4.1 mm

1.5 inch

3 V

125 Cel

-40 Cel

MATTE TIN

SOLDER

4 mA

e3

AH3777-P-A

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

CURRENT OUTPUT

RECTANGULAR

30-55mA

-17 mT

28 V

55 A

17 mT

28 mT

4.1 mm

2.235 inch

3 V

125 Cel

-40 Cel

MATTE TIN

SOLDER

4 mA

e3

AH9250-P-B

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

DIGITAL CURRENT

RECTANGULAR

-4 mT

5.5 V

1 A

-3 mT

1 mT

4 mm

1.52 inch

4.705 mm

2.5 V

85 Cel

-40 Cel

MATTE TIN

SOLDER

3 mA

e3

AH3763Q-P-A

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

CURRENT OUTPUT

RECTANGULAR

30-55mA

-4.5 mT

28 V

55 A

4.5 mT

6 mT

4.1 mm

2.235 inch

3 V

150 Cel

-40 Cel

MATTE TIN

SOLDER

4 mA

e3

AH3764Q-P-A

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

CURRENT OUTPUT

RECTANGULAR

30-55mA

-6 mT

28 V

55 A

6 mT

8 mT

4.1 mm

2.235 inch

3 V

150 Cel

-40 Cel

MATTE TIN

SOLDER

4 mA

e3

AH3767Q-P-A

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

CURRENT OUTPUT

RECTANGULAR

30-55mA

-17 mT

28 V

55 A

17 mT

28 mT

4.1 mm

2.235 inch

3 V

150 Cel

-40 Cel

MATTE TIN

SOLDER

4 mA

e3

ATS277H-PG-B-A

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

VOLTAGE OUTPUT

RECTANGULAR

-5 mT

20 V

5 mT

7.5 mT

5.22 mm

1.55 inch

5.07 mm

3.5 V

85 Cel

-20 Cel

Matte Tin (Sn)

SOLDER

25 mA

e3

AH173-PG-A-A

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

DIGITAL VOLTAGE

RECTANGULAR

PLASTIC/EPOXY

-6 mT

20 V

25 A

BIPOLAR

BIPOLAR(LATCHED)

6 mT

8 mT

4.1 mm

1.5 inch

12

SIP3,.03,50

Other Sensors

3 V

125 Cel

-40 Cel

MATTE TIN

SOLDER

PASSIVE PULL-UP

6 mA

e3

AH173-PG-A-B

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

DIGITAL VOLTAGE

RECTANGULAR

PLASTIC/EPOXY

-8 mT

20 V

25 A

BIPOLAR

BIPOLAR(LATCHED)

8 mT

8 mT

4.1 mm

1.5 inch

12

SIP3,.03,50

Other Sensors

3 V

125 Cel

-40 Cel

MATTE TIN

SOLDER

PASSIVE PULL-UP

6 mA

e3

AH337-PG-A

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

VOLTAGE OUTPUT

RECTANGULAR

PLASTIC/EPOXY

3 mT

28 V

25 A

UNIPOLAR

15 mT

6 mT

4.1 mm

1.5 inch

12

SIP3,.03,50

Other Sensors

4.2 V

125 Cel

-40 Cel

MATTE TIN

SOLDER

OPEN-DRAIN

4 mA

NON-INVERTING

e3

AH337-PG-B

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

THROUGH HOLE MOUNT

3

VOLTAGE OUTPUT

RECTANGULAR

PLASTIC/EPOXY

3 mT

28 V

25 A

UNIPOLAR

15 mT

6 mT

4.1 mm

1.5 inch

12

SIP3,.03,50

Other Sensors

4.2 V

125 Cel

-40 Cel

MATTE TIN

SOLDER

OPEN-DRAIN

4 mA

NON-INVERTING

e3

AH373-SA-7

Diodes Incorporated

MAGNETIC FIELD SENSOR,HALL EFFECT

SURFACE MOUNT

3

DIGITAL VOLTAGE

RECTANGULAR

PLASTIC/EPOXY

-6 mT

20 V

BIPOLAR

6 mT

6 mT

2.9 mm

1.3 inch

2.2/20

TO-236

Other Sensors/Transducers

1.05 mm

2.2 V

125 Cel

-40 Cel

MATTE TIN

SOLDER

PASSIVE PULL-UP

4 mA

NON-INVERTING

e3

Magnetic Field Sensors

Magnetic field sensors are electronic devices that measure the strength and direction of magnetic fields and convert them into a measurable electrical signal. They are commonly used in a variety of applications, such as navigation, automotive, industrial, and medical.

Magnetic field sensors work by detecting the change in magnetic field strength or direction as a magnetic field interacts with a sensing element. The sensing element is typically a small piece of magnetic material, such as a magnetoresistive or Hall-effect sensor, which generates a measurable electrical signal proportional to the strength and direction of the magnetic field.

There are several types of magnetic field sensors, including Hall-effect sensors, magnetoresistive sensors, and fluxgate sensors. Hall-effect sensors work by measuring the change in voltage across a thin strip of semiconductor material as it is exposed to a magnetic field. Magnetoresistive sensors work by measuring the change in resistance of a thin film of magnetic material as it is exposed to a magnetic field. Fluxgate sensors work by using a coil to detect the magnetic field and a feedback circuit to measure the strength and direction of the field.