Design World October 2015

Page 86

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n operating temperatures up to 105° C. Units are accurate from 0 to 360° rotation with 0.5 V to 4.5 Vdc output or 10 to 90% duty cycle for PWM.

Applications: Rotary Hall-effect sensors are becoming increasingly popular for replacing resistive film and potentiometers—mechanical devices subject to wear and oxidation that degrade signals in the control unit. So, Halleffect sensors work in myriad motion designs. For example, they can help measure the angle of a flapper valve in a fluid-flow system to precisely adjust the flow rate; in control circuits, they work to detect dial position.

Reed sensors work well on elevator-door applications.

Which coating is best for your

EMI/RFI shielding application? SODIUM SILICATE COATING SYSTEMS High temperature resistant • Water based

MB600S

Basics of linear Hall-effect sensors Linear Hall-effect sensors measure linear movement of a magnetic field rather than rotation. Such sensors are programmable for a set output voltage that is ratiometric for a given travel distance. (Their output options are the same as those for rotary Hall-effect sensors.) The sensors measure linear movement and relative flux angle of magnetic

AntiVibration Mounts

MB600G

SILVER FILLER

GRAPHITE FILLER

SURFACE RESISTIVITY

SURFACE RESISTIVITY

<10 ohm

<1 milliohm

MB600SCN

• Absorb kinetic energy on impact • Prevent damage shock and rebound • Use as bumpers, leveling feet, or sound dampers

SILVER COATED NICKEL FILLER

SURFACE RESISTIVITY

<10 milliohm

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October 2015

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