AI- Tek Instruments DH Series Magnetic Hall Effect Sensor

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

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