Angle, position and current sensing, as well as compasses and even some switches, rely on magnetic sensors. While Hall-effect technology has been a dominant enabler of these sensors, so-called xMR or magnetoresistive/magnetoresistance technologies are playing an increasing role. The x can stand for anisotropic (AMR), giant (GMR) or tunnel (TMR). With these new technologies playing […]
Hall Effect
How fast is that thing going?
The need for speed implies the requirement for speed sensing. Speed sensors provide the input and feedback data to monitor and control motors and other rate sensitive linear and rotary applications. For example, the throughput of automated high-speed production lines depends on many parameters but the line speed is an early indication of expected versus […]
No Contact- No Wear Angle Sensors
Novotechnik, U.S. RFC4800 Series of touchless angle sensors can measure angular position up to 360° for a revolution counter and speed measurements. The RFC4800 Series of Hall Effect sensors includes programmable zero point offset, measurement averaging and sign of rotational direction and has a resolution of 14-bits across 360°, repeatability of 0.36° and independent linearity […]
Hall Effect Sensors
By Chris Francis Magnetic sensors are typically Hall effect sensors (named after Edwin Hall who discovered the effect in 1879), whereby a small voltage difference can be measured across a conductor with current flowing through it when a perpendicular magnetic field is applied. They are available as small, integrated solutions with signal or multiple outputs, […]
Magnetic Position Sensors Address Automotive Application Issues
In addition to meeting traditionally tough automotive specs, some newer automotive applications require IS26262 safety certification. For magnetic position sensing applications, ams AS5170 (8-pin SOIC package) and AS5171 (System-in-Package (SiP) format) sensors were specifically developed as Safety Element out of Context (SEooC) devices, as defined in the ISO26262 functional safety standard. Both are available with […]