The 907B XP Hall-effect quadrature sensor is designed for applications requiring both speed and direction information. Available in either the 907BV or 907BH configuration, it produces a digital pulse signal for use with speed switches, tachometers, counters, signal conditioners, or can be used as a direct pulse generator. As a pulser disc or split collar wrap (mounted on the monitored shaft) rotates, the target magnets pass in front of the sensor. The Hall-effect sensor switches high and low as it is exposed to the alternating polarity of the magnets on the disc or wrap, producing a digital pulse output. The 907BV is used where the magnets will pass vertically in front of the sensor face. The 907BH is used where the magnets will pass horizontally in front of the sensor face - consult factory for more information.
The recommended gap distance between the sensor and pulse generator is 1/4 inch +/- 1/8 inch. The gap flexibility makes the sensors tolerant of vibration, slight shaft run-out, minor misalignment, and other industrial elements. The 907B XP sensors are used in applications requiring explosion-proof ratings, or in applications where the sensor may be subject to abuse.
The sensors can be mounted up to 1500 feet from the control unit - speed switch, tachometer, etc. They are powered by 5-25 Vdc and provide an NPN Open Collector output. The 907B XP sensor has an XLB-3 enclosure which is C.S.A. approved and UL rated for Class I Group D; Class II Group E, F, G; Class III. It has a 1-inch NPT conduit opening, and is provided with a mounting bracket.
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