- Hall Effect Zero Speed Sensors
- Variable Reluctance Speed Sensors
- RF (Eddy Current) Speed Sensors
- Amplified (Active) Speed Sensors
- Preamplifiers
- Intrinsically Safe ATEX & CSA Speed Sensors
- ExplosionProof (Ex d) ATEX & IECEx Speed Sensors
- Accessories
- Speed Sensor Part Numbers
- Which Sensor is Best for My Application?
Quadrature Output Dual Channel Speed Sensors - HD Series
The HD series of sensors is based on Hall Effect sensor technology, which can sense a change in target motion from true zero to 20 KHz. The HD series offers dual channel output and, where required directional logic. The output frequency of HD sensors has a square pulse waveform (digital) that directly relates to the number of turbine blades, gear teeth, etc. that have been sensed. These pulses, in turn, can be correlated to determine flow rate, RPM, or velocity.
Types of Dual Channel Hall Effect Sensors
These sensors are dual channel versions of our H series or HM series of sensors and offer two channels of output.
HD sensors based on the HM series require that the target be a magnet, such as magnets embedded in gear teeth, blade tips, or around a disc. They must be oriented to the direction of the target movement and can be set to sense both north and south oriented magnets or only north or south respectively. Air gap distances can be as much as 0.200" to 0.250" away, depending on target shape and magnetic field strength.
HD sensors based on the H series incorporate a magnet within the sensor, enabling them to sense ferrous metal as well as magnet targets. Maximum air gap sensing distances are typically 0.100" and these sensors can be optimized to detect fine as well as large pitch targets. As with sensors based upon the HM series, they must be oriented to the direction of target movement to work effectively.
Input Power
- 4.7 to 24 VDC regulated, 15 mA maximum @ no load
- Reverse polarity protected
Pulse Output Options
- TTL/CMOS (Standard); fan-out of 5 TTL/CMOS loads
- Open Collector
- Supply tracking:
logic 0: 0.4 VDC
logic 1: (VS-0.2)xRL/(RL+2200)
Airgap
- Up to 0.250" dependent on target geometry, magnet construction and sensor construction (for those sensors based on the HM series)
- Up to 0.100" dependent on target geometry, magnet construction and sensor construction (for those based on the H series)
Interconnection Options
- Pigtail with wires or cable
- NPT threaded body with wire or cable pigtail for explosion proof environments
- Connector per customer specifications
Physical Features:
- Operating temperature: -40°C to +105°C
- NOTE:
units that operate up to +150°C are also available - Storage temperature: -40°C to +150°C
- Body material: 300 series stainless steel
- Encapsulation: epoxy potting or hermetically sealed, welded construction
- High Shock and Vibration Resistance - contact factory for details
Orientation:
- Alignment of the sensor to target rotation is required for optimal performance, ensuring proper orientation of the hall effect element to the magnetic field
- Our Quadrature sensors are aligned and tested with a 12 pitch gear. The alignment mark on the sensor housing is based upon the 12 pitch gear. In the event that a finer pitch gear is used, the alignment mark should be dis-regarded and the sensor rotated during installation while monitoring the output in order to obtain the proper Quadrature signal. If the proper alignment markings for use with a finer pitch gear is desired, please contact the sales department with gear details prior to ordering.
Approvals
- CE compliant to EMC Directive 2004/108/EC for use in residential, commercial, light industrial and heavy industrial environments
Warranty:
- Unconditional one (1) year warranty if used within specifications
786 Pitts Chapel Rd
Elizabeth City, NC 27909