Description A high quality, digital hall effect sensor for use as a wheel speed sensor. Specifically designed to withstand Automotive enviroments. It’s typical application is for wheel speed sensing, though it is equally capable of cam position sensing and crank position sensing (providing there are not too many teeth on the trigger wheel – typically not more than 12 for < 10000rpm). Compatible ECU's include Adaptronic, DTA, Motec, Syvecs, Link and many more. Note, these are NOT cheap replica sensors. The sensor is of the proximity type and will often work fine with an existing ABS trigger ring or other metal toothed trigger or ring somewhere in the drive train. The sensor is directly interchangeable with the (now discontinued) Honeywell 1GT101DC sensor. The sensor should run from ignition power but will work with any voltage input from 4.75 to 24vdc. The output is of the “open collector” type meaning that when the sensor detects a tooth on the ring it’s output will be closed (or pulled) to ground. Dimensions are: Length = 35mm (not including wires) Diamater of cylinder = 18mm Maximum switching speed = 15Khz Wiring details: Red trace = supply (4.74 to 24vdc) Black wire = – ground White with black trace = output These units have built-in “pull up” so no additional resistor is required between output and supply. The output is pulled-up to supply voltage. Normally open output (so output will be high for no tooth. When a tooth is detected the output is pulled close to 0v.) For launch control with an Adaptronic you need only the one speed input from an un-driven wheel connected to an SVSS input. For gear dependent boost with Adaptronic you need either a differential speed signal or a sensor like this on each driven wheel connected to the MVSS inputs. For traction control you typically need all 4 wheels monitored, or as a minimum you can use differential speed and a un-driven wheel speed. Using an ABS ring on those wheels with one of these sensors mounted above it (rather like a crank angle sensor) is the simplest way of achieving a speed signal.
