MICROSONIC® Thru-beam Sensors Model SM100 Series 0 pages

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Model SM100 Series

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MICROSONIC®

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Thru-beam

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Sensors

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Industry proven, these

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MICROSONIC® sensors

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increase "uptime" with

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reliable, thru-beam

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sensing in harsh, high-

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speed environments

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In response to problems di-

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rectly attributed to the harsh en-

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vironments in which sensors

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operate today, Hyde Park offers

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broad application solutions with

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this industry-proven line of ultra-

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sonic thru-beam sensors. First

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produced in 1974, the

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MICROSONIC® SM100 series

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sensors are a "workhorse" in the

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Hyde Park product line with tens

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of thousands of units continu-

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ing to perform a variety of thru-

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beam sensing functions

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throughout the world.

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Using the world's leading ultra-

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sonic sensing technology, the

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MICROSONIC® SM100 series

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sensors perform precise object

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detection. Of objects from trans-

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parent containers to metal parts

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as small as 6.4 mm (1/4") di-

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ameter at speeds in excess of

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2,000 units per minute.

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Unlike photoelectrics, these

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stainless steel sensors are vir-

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tually unaffected by splashing

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food, caustic cleaning solutions,

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frequent high-pressure wash-

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downs, humidity, changing light

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conditions or colors, dust, and

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ambient noise. The rugged sen-

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sors need no maintenance and

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require no sensitivity adjust-

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ments to compensate for incon-

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sistent product materials.

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Response times range from 4

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ms down to 0.6 ms. The 12 to

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24 VDC circuitry and output sig-

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nal make these sensors directly

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compatible with many program-

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mable logic controllers, comput-

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ers, and other logic control sys-

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tems.

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Operation

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The MICROSONIC® sensors

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are continuous-wave devices

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that consist of an ultra-high-fre-

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quency transmitter and receiver

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positioned opposite each other,

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illustrated below, at a distance

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of up to 1,829 mm (72"). During

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operation, the transmitter sends

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a continuous ultrasonic beam

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which is picked up by the re-

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ceiver. When an object of any

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material or shape passes be-

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tween the transmitter and re-

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ceiver and breaks the beam,

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object presence is detected and

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the output of the receiver

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switches. Or, when a hole as

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small as 3 mm (1/8 inch) diam-

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eter allows the beam to pass

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through to the receiver, the out-

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• Self contained

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• Meets NEMA4X (in-

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door use only) & IP67

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standards

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• Survives harsh

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environments

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• No sensitivity

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adjustments

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• Sensing ranges up to

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1,829 mm (72")

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put of the receiver switches.

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With all circuitry compactly

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sealed in the stainless steel

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transmitter and receiver probes,

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the MICROSONIC® sensors

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boast a narrow, constanthigh-

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frequency sonic beam for high

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sensing resolution.

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The thru-beam sensing mode

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is set up by mounting the sen-

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sors on the same axis opposite

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each other as shown in Figure

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1 .The distance (range) between

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the transmitter face and receiver

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face can be up to 1,829 mm

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(72"), depending on the model

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and range selected.

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Positioning of the transmitter

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and receiver for operation is ex-

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tremely important for the reli-

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able detection of objects, par-

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ticularly small ones. As the fig-

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ure also shows, the width of the

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transmitted sound beam initially

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expands at a rate of 10 degrees

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(5 degrees each side of the com-

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mon axis) as the distance be-

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tween the transmitter and re-

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ceiver increases. This means

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that if the distance between the

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transmitter and receiver is too

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5-3

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