SPECTEC's Hall effect speed sensors:
- Magnetic Hall effect sensor is activated by a magnetic target
- Hall effect gear tooth sensor is biased by an internal magnetic to be activated by a ferrous (gear) target,
- Hall effect quadrature sensor and
- Intrinsically Safe type Hall effect sensors.
The Hall effect technology fulfills a wide array of applications due to the Hall effect sensor's ability to detect zero speed and direction change and produce a digital output that is read by computers, motion control devices, position monitors and digital to analog converters.
SPECTEC's zero speed Hall effect sensors are used in industrial applications as an output shaft speed sensor to determine shaft or gear speed or direction by detecting fluctuations in the magnetic field.
Hall Speed Sensors For Magnetic Targets
SPECTEC's magnetic Hall effect speed sensors are designed to switch in the presence of a magnetic field of 50 Gauss minimum. Magnetic Hall effect sensors meet a wide array of applications due to its ability to detect the difference in a magnet's north or south pole disposition. Both uni-polar (activated by either north or south pole magnets) and bi-polar (alternating north-south pole activation) are offered. In addition, an omni-polar model (HO type) is available which responds equally to a north or south pole field and converts it to a digital pulse.
Hall Speed Sensors For Ferrous Targets
SPECTEC's HF and HHF type Hall effect sensors are engineered with an internal magnet to switch in the presence of ferrous targets such as gear teeth and blade tips down to absolute zero speed. The gear speed Hall effect sensor detects fluctuations in the magnetic field and can also be configured to so the output signal signifies either the presence or absence of a ferro-magnetic target (i.e. a gear tooth).
The Hall effect gear tooth sensor has the ability to sense a ferrous target while applying zero drag on the target wheel with a sensitivity that detects gear teeth as small as 0.10" wide and 0.10" deep. Air gaps of up to 1/8 inch are possible, depending on mass of target (size of gear).
Quadrature Sensor - Hall Gear Position Sensors - Directional Sensing
The Hall effect quadrature sensor, without applying any magnetic drag, detects the direction a ferrous target, such as a target gear wheel, is traveling. SPECTEC's Hall effect quadrature sensor's sensitivity detects gear teeth as small as 0.10" wide and 0.10" deep. Depending on the size of the target gear, air gaps of up to 0.125" inch may be achieved.
The Hall effect gear position sensor, are dual output sensors that detects the direction and position of a target gear . Also used for rotation profiling, angle profiling and field profiling. SPECTEC's Hall effect position sensor detects gear teeth as small as 0.10" wide and 0.10" deep. Three position sensors can be used to detect X, Y, Z axis of a target.
SPECTEC's line of Hall effect sensors include: Intrinsically Safe, single output, dual output sensors, additional temperature outputs, hermetically sealed, sanitary and conduit-mount. Standard output (NPN) is provided by a 2.2 K ohm internal resistor to a collector which can sink 25mA. In addition, PNP and open collector types are available in order to serve all logic needs.
The magnetic zero speed Hall effect sensors are used in speed sensor applications and digital devices which switch from logic state 0 to logic 1 in the presence of a magnetic field of 50 gauss (H type) and 5 - 10 gauss (HF type).
Zero Speed Sensors Applications:
Hall effect sensor applications such as fine gears, quadrature detection of very low to zero speed and the change in target direction. Hall effect sensors are used as a vehicle speed sensor, wheel speed sensor, ABS brake systems and as camshaft sensors.