Durham Instruments carries a variety of pulser discs, magnet wheels

Electro-Sensors manufactures many kinds of pulser discs and magnet wheels.

Among the many great measurement solutions available through Durham Instruments are devices for industrial speed measurement. With these products, businesses monitor speed with inductive, magnetic, and other technologies for feedback in challenging environments, like machine RPM, over-speed, under-speed conditions. Examples include various combinations of pulser discs, pulser wraps, speed sensors, housings, and electronic alarm or transmitter modules. Electro-Sensors manufactures many options in this category.

With 120 alternating magnetic poles

Electro-Sensors offers two models of magnet wheels – the 198EM and the 199SM. These 60 Pole Pair devices are ferro-magnetic nylon wheels with 120 alternating magnetic poles infused within the material. With a diameter of 3¾ inches, each unit has the magnetic surface on the outside circumference of the wheel; the rectangular magnets are evenly spaced with small non-magnetized spaces between them.

These wheels are usually mounted on shafts with diameters of up to three inches. They are custom-bored onto the shafts and secured with two set screws. Durham Instruments offers many standard hub sizes, including NEMA C Frame Motor sizes, and they also come in end-of-shaft mount versions.

Also available: eight models of Electro-Sensors heavy-duty pulser discs. These are designed with magnets of alternating polarity embedded in the faces of the discs on the outside edges or circumferences. The end of each shaft to be monitored is centre-drilled and tapped, and the disc is mounted on the shaft end. The magnets function as targets for Hall Effect sensors, which switch as a result of exposure to changing magnetic poles.

Models of pulser discs available:

• 232. Four-inch PVC disc with 32 face-mounted magnets.
• 255. The standard for most Electro-Sensors systems. Four-inch nylon disc with 16 face-mounted magnets.
• 256. A 2½-inch PVC unit with eight face-mounted magnets. Standard with M5000 speed switch systems.
• 257. Eight-inch PVC disc with 32 face-mounted magnets.
• PD225. Measuring 2¾ inches in diameter, with 20 face-mounted magnets.
• PD455. Measuring 4¾ inches in diameter; 20 face-mounted magnets.
• PD725. Diameter of 7½ inches; 60 face-mounted magnets.
• PDE450. Four inches in diameter; 20 edge-mount magnets.

To learn more, contact Durham Instruments.

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