A magnetic sensor converts field strength or field direction into a voltage or a digital word, so position, speed, and current can be measured with nothing touching the moving part.

Hall is the mature, low-cost default over the widest field range. AMR uses permalloy whose resistance tracks field direction and gives an output proportional to field strength. GMR is the most sensitive of the thin-film types. TMR adds a tunnel barrier for strong output, high precision, and stable behavior over temperature.

Fix the measurement before the part number. Angle and position designs are judged on linearity and resolution. Proximity and end-stop designs need a repeatable operate and release point. Current sensing needs isolation and field linearity. Then match supply, package, and temperature grade.

Magnetic sensor specialist with more than 2,100 models of magnetic switches, Hall sensors, and encoders. The encoder family runs from the 14-bit MT6816 and 15-bit MT6701 up to the 21-bit MT6835, alongside the AEC-Q100 and ISO26262 angle chip MT6521 and the high-isolation current sensor MT9522. Parts operate from -40°C to 150°C for EV, industrial, consumer, and energy designs.

383 sensor part numbers. Hall switches in 22, 33, and 46 Gauss grades from 1.6V to 5.5V in SOT-23-3L, SOT-553, TO-92S, and HFBP1010-4L; KTM1331 TMR switches from 5 to 45 Gauss; 24-bit TMR angle sensors KTM5900 and KTM5910; 16-bit angle encoder KTH7815.

Linear Hall sensors with supply down to 1.0V in SOT-23, SIP-3, DFN, and TSSOP-8; 12-bit angle sensors from the A1330 series to the AAS33051 with supply up to 18V; A33115 and A33110 TMR angle sensors; 3D Hall devices including ALS31313, A31315, A31316, and A31301.

446 sensor part numbers across position, 3D, ultra-low-power, linear Hall, and rotation sensors. MLX90421, 90422, 90425, and 90426 cover on-axis, off-axis, and linear position; MLX90393 and MLX90395 add 3-axis and joystick sensing; MLX90290 linear Hall and MLX90380/90381 rotation sensors complete the range. Many grades run to 160°C ambient.

An angle sensor on the shaft gives the drive absolute rotor position at power-up, so BLDC and PMSM motors start without a homing sequence.

Contactless angle sensing replaces the potentiometer in steering, pedal, and throttle assemblies, with no wiper track to wear through.

Hall and TMR current sensors measure bus and phase current while keeping galvanic isolation from the high-voltage side of inverters and BMS.

A 3D Hall device reads rotation, tilt, and push in a single package for appliance dials, game controllers, and industrial HMI.

Hall switches give repeatable operate and release points for valve position feedback and cylinder end-of-stroke detection.

A magnet on the rotating part plus a Hall switch produces a clean pulse train for wheel speed, flow meters, and lid or door detection.

Hall sensors use the Hall effect and are the most mature and lowest cost option over the widest field range. AMR uses permalloy whose resistance changes with field direction, so the output is proportional to field strength and suits angle and position work. GMR changes resistance with field direction with very high sensitivity. TMR uses a tunnel barrier for a strong output, high precision, and good temperature stability.

For a few tenths of a degree, start with a TMR or AMR angle sensor and plan a line calibration step. For scale, the CONNTEK KTH7812-X-N-QN16 outputs 16-bit absolute angle with INL ±0.35° and 0.015° noise; the Magntek MT6835 encoder reaches 21-bit. The chip alone does not set system accuracy — magnet, air gap, and calibration do.

The field passes through non-magnetic material, so a plastic, aluminium, or stainless housing wall in the gap is normally fine — that is the point of contactless sensing. Ferromagnetic parts distort the field, so keep steel screws, shafts, and brackets out of the sensing area.

Magnet material, air gap, eccentricity, and temperature drift. NdFeB has a temperature coefficient of about -0.120% per °C and samarium cobalt about -0.035%, so the gap between them is real once the assembly sits at 70°C to 80°C. An on-axis 10mm to 30mm magnet tolerates a 1.0mm to 5.0mm gap; off-axis mounting needs factory calibration because the field is no longer axisymmetric.

Click the brand above to browse models, or send us the part number you are replacing, the quantity, and the accuracy you need. We reply with datasheets, samples, and cross-references within one business day.

The MCU that samples the sensor output and closes the control loop, from Artery, YunTu, Cmsemicon, and Winner.

Amplifiers, references, and comparators that condition the sensor output before the ADC sees it.

Regulated 3.3V and 5V rails for the sensor and MCU in 12V and 24V systems.

Clock sources for control-loop timing and encoder interface sampling.

Firmware and calibration tables stored beside the sensor, executed in place at boot.

Browse all memory, oscillator, MCU, analog, and sensor lines in one place.

Why a joint only tens of millimeters across uses a magnetic encoder, and what 16-bit absolute angle, ±0.35° INL, and a 3×3mm QFN buy you — plus magnet choice, air gap, and line calibration.

Many sensor projects start as a replacement. Tell us what is on the board today, the magnet and air gap in the drawing, and the accuracy you must hit — we will come back with an equivalent and a datasheet.