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Hall Effect Devices detect magnetic flux density (mainly produced by a permanent magnet) and are used in both movement and position sensing. By integrating the sensing element onto the same silicon as its control logic and interface circuitry, Melexis has produced sensor chips with various degrees of intelligence to suit most applications. Sensing the rotation of shafts (e.g. cam- and crank-shaft) in engine, monitoring movement in motors and actuators, sensing pedal, throttle and steering wheel position, Melexis Hall Devices offer a reliable, contactless method of movement and position detection.
Melexis is a technological leader for the design, development and testing of integrated Hall Effect Devices. Melexis Hall Effect Devices enable an optimal use of the smaller feature sizes of which semiconductor technology is capable today. Therefore, very sophisticated mixed analog-digital signal conditioning circuitry (such as Chopped Analog String, Digital Signal Processing Core, Microcontroller) can be integrated. Most of the devices can withstand the severe automotive conditions despite few external components.
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If you look for a sensor for position, passage, presence, level or speed, we must have it in our range of magnetic sensors. We can even design the ideal product for your applications.
At celduc® relais, we are eager to offer the best products for your application, thanks to our 30-year experience in the key technologies that we use in our products :
- Reed switch, a dry contact in a sealed glass bulb providing insulation at the same time. A simple, reliable and low cost solution.
- Electronic cell, based on either magneto-resistance or Hall effect, necessary for higher performance, particularly in frequency .
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Honeywell's miniature position sensors respond to the presence or the interruption of a magnetic field by producing either a digital or an analog output proportional to the magnetic field strength. These Hall-effect sensors have single and double sensing elements for mounting on IC chips. These extremely small sensors come in a variety of magnetic actuation types including omnipolar, unipolar, bipolar, bipolar latch, ratiometric and analog. Termination types include radial lead IC and surface mount. Some products are available on tape and reel.
Best Used For:
Speed and RPM sensing, brushless dc motor commutation, motor and fan control, tachometer and counter pickup, disc speed and tape rotation, magnetic encoding and flow rate sensing.
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Hall-Effect Position Sensor W/ Linear Output Voltage (HL)
Non- contact magnetic sensors that are designed to respond to a wide range of positive or negative magnetic fields and can sense relatively small changes in a magnetic field. By having magnet as a target, this unit produces a Ratio-metric Rail-To-Rail linear output. It also has an internal amplifier to boost the output to a higher level. These sensors are ideal for applications such as magnetic flux measurement, displacement, and linear output rotary measurement.
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Description:
These Hall-effect devices contain a monolithic integrated circuit which incorporates a Hall element, a linear amplifier, a threshold amplifier, and Schmitt trigger on a single Hallogic® silicon chip. Included on-chip is a band gap voltage regulator to allow operation with a wide range of supply voltages. These devices feature logic level output and provide up to 21 mA of sink current. This allows direct driving of more than 7 TTL loads or any standard logic family using power supplies ranging from 4.5 to 24 volts. Output amplitude is constant at switching frequencies from DC to over 200 kHz. The Uni-Polar turns on with a (logic level “0”) after a sufficient magnetic field from the south pole of a magnet approached the symbolized face of the device (Operating Point) and turns off (logic level “1”) after the magnetic field reached a minimum value. The Bi-Polar latch device turns on (logic level “0”) in the presence of a magnetic south pole and turn off (logic level “1”) when subjected to a magnetic north pole. Both magnetic poles are necessary for operation for Bi-Polar devices. This feature makes these sensors ideal for applications in noncontact switching operations, brushless DC motors and for use with multiple pole magnets.
Features:
- Designed for non-contact switching operations
- Operates over broad range of supply voltages (4.5 V to 24 V)
- Operates with excellent temperature stability in harsh environments
- Drive capability up to 7 TTL loads
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Hall Sensors are used for speed, rotational speed, linear position, linear angle and position measurement in automotive, industrial and cunsumer applications.
Integrated silicon based Hall ICs containing the hall element and the signal conditioning circuitry monolithically integrated on one single chip.
* Transmission Speed Sensor IC
* Dynamic Differential Hall IC
* Chopped Hall Switches
* Programmable Linear Output Hall Sensor
* Low Power Hall ICs
* Self calibrating Differential Hall ICs for Wheel Speed Sensing
* Dynamic Differential Hall ICs
* Uni- and bipolar Hall IC Switches
* Chopped Mono Cell Hall IC
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GVS series Gear tooth sensor provides speed sensing capabilities using an integrated Hall-effect sensor in conjunction with a permanent magnet which supplies a bias field, this ready-to use pick-up directly senses rotating ferrous gear and other similar gear type target. GVS speed sensor is a non-contact, solid state ferrous detecting device with a switched output. Its unique design provides a low cost solution for a wide range of speed sensing applications, especially those requiring true zero speed performance. This device utilizes a Hall Effect sensor that is internally biased with a permanent magnet and detects the interaction from an external ferrous target. Unlike earlier Hall based products, this device automatically detects changes in target position or symmetry to compensates for these changes. This specialized feature eliminates the need to externally calibrate or mechanically adjust each sensor for optimum performance. In addition, electronic hysteresis built into the device eliminates false triggering due to mechanical backlash and vibration.
Features:
Digital Output Signal
Gear Tooth Sensing Capability
No Rotary Orientation Concerns
Operation from –40°C to 125°C
Short Circuit Protection
Zero Speed Operation
High Speed (15kHz) Operation
6.3-24 VDC Operation
Nickel plated, Brass housing
PVC jacketed cable
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AI-Tek has taken its years of experience of designing and manufacturing Hall Effect sensors for engine timing applications and has developed a line of durable products for industrial use.
With multiple standard variations we offer the widest range of standard catalog sensors to meet your various design needs. The design is flexible to easily meet all of your application requirements.
The Hall Effect sensor can sense each change in target movement, regardless of speed, from near zero to 15 kHz frequency range, generating a steady pulse train of frequency proportional to target speed. Typically, each time a gear tooth (or any ferrous discontinuity) passes in front of the sensor the output changes state. This type of sensor is known as a "P" type because it uses N-P-N transistor logic (as opposed to "N" type, which uses P-N-P transistor logic).
Key features to note are:
- Reverse voltage protection, up to -30 Vdc, to prevent damage if miswired
- Higher temperature range of -40°C to +125°C
- Wide range of supply voltage in single design of 4.5 - 24 Vdc
- Two output options of Supply Tracking or TTL Compatible
- Rugged design meeting IEC 77 Standards (European Railroad Applications)
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Hall-Effect Zero Speed Sensor (HS)
Non-contact magnetic sensors that measure the distortion of magnetic field created by a ferrous target. Hall-Effect Zero speed sensors provide very precise measurements of movement even at zero speed which makes the Hall-Effect zero speed sensors ideal for speed measurements. Hall-effect zero speed sensors provide digital output with constant amplitude signal regardless of variation of the speed.
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Wheel Speed Sensor, Gear Speed Sensor : Hall Effect Speed Sensors
Gill Speed Sensors use a dual element hall effect device to detect changing magnetic fields in the presence of a toothed ferrous metal target wheel. Tried and proven in F1 championship gearboxes, our speed sensors are suitable for either gearbox or wheel speed sensing.
With robust fully encapsulated constructions, unique internal designs and sealing methods, the sensors may be fully immersed in oil at high temperature without reduction in performance.
We currently have several differential speed sensor designs available and have the ability to rapidly produce custom products if required.
- Zero Speed to 20KHz
- No Moving Sensor Parts
- High Temperature Operation to 150°C
- Robust
- Thermally Stable
- Compact
- Lightweight
- Custom Designs Available
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