AI- Tek Instruments DH Series are differential based, zero-speed, precision, single-channel, speed sensors. At power-up, they calibrate themselves to the unique magnetic signature of their installed application and continue to update the calibration as the sensor is running.
The experts at AI-Tek have been designing and manufacturing Hall Effect sensors for harsh applications for over sixty years. With a dedication to providing reliable and accurate sensors, the Magnetic Hall Effect Sensor DH Series product line is developed specifically for the industrial, rail, military, and automotive industries.
AI-Tek has taken its years of experience in designing and manufacturing Hall Effect sensors for harsh applications and has developed a line of durable products for industrial, rail, military, and automotive use.
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This unique combination of differential sensing technology and calibration makes these sensors highly tolerant of installation misalignment, target geometry and composition, target run-out, vibration, and air gap changes.
In comparison, the RH series are single-element based, zero speed, single-channel speed sensors and are an excellent choice for general-purpose speed sensing. Unlike the Magnetic Hall Effect Sensor DH Series that requires rotational alignment at installation, the RH requires no alignment. Air gap adjustment is precise and easy and similar to a VR type sensor.
The Magnetic Hall Effect Sensor DH Series can sense each change in target movement, regardless of speed, from zero to 15 kHz frequency range, generating a steady pulse train of frequency proportional to the 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 the “N” type, which uses P-N-P transistor logic).
AI- Tek Instruments DH Series Features:
- Reverse voltage protection, to prevent damage if miswired
- Wide range of supply voltage
- Two output options of Supply Tracking or TTL Compatible
- Rugged design meeting IEC 77 Standards (European Railroad Applications)
- Require special alignment
- Improved duty cycle
- Improved fine pitch performance
- Increased air gaps
- Special circuitry provides a high level of EM1 hardness
- Select versions equipped with RTD temperature measurement output
AI- Tek Instruments DH Series Specification
| Power Supply | |
| Power Supply Voltage | 4.5 – 24 Vdc |
| Power Supply Current | 50 mA maximum |
| Outputs | |
| Output Voltage | Essentially square wave fanout to 10 TTL inputs |
| TTL Compatible | 50% ±10% duty cycle |
| Logic 0: +.6 Vdc maximum | |
| Logic 1: +4 to +5 Vdc @ 5mA | |
| Supply Tracking | 50% ±10% duty cycle |
| Logic 0: +.6 Vdc maximum | |
| Output Impedance | 2.2K Ohms ±5% |
| Output Current | 20 mA sink maximum |
| Output Current – Short Circuit | 5 mA maximum with 10V power supply |
| Reverse Battery Voltage | -30 Vdc |
| Mechanical | |
| Target Frequency | 0 to 15 kHz |
| Target Air Gap | .005 to .025 with a 32 diametral pitch gear |
| .005 to .055 with a 24 diametral pitch gear | |
| .005 to .100 with a 20 diametral pitch gear | |
| .005 to .120 with a 12 diametral pitch gear | |
| .005 to .175 with an 8 diametral pitch gear | |
| Materials | |
| Housing | 300 series stainless steel |
| Connector | MIL Style Mates with MS3106A10SL-3S |
| Leads | AWG #24 Teflon, 200°C |
| Cable | AWG #20 Irradiated cross-linked polyolefin, 125°C |
Download Data Sheet: Magnetic Hall Effect Sensor DH Series
Ref: aitekinstruments.com