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AccuRange 200™ laser displacement sensorswith measurement spans from 6 mm to 50 mm

AR200 Model Specifications in mm unless stated otherwise

Model 200-6M 200-12M 200-25M 200-50MMeasurement Range 6.35 12.7 25.4 50.8 inches 0.25 0.50 1.00 2.00Standoff 21 20 34 42 inches 0.827 0.787 1.339 1.654Linearity/Accuracy +/- 0.2%Resolution 0.0019 0.0038 0.0076 0.015 inches 0.000071 0.00014 0.0003 0.0006Laser Spot Size (µm) @ target standoff 35 40 45 50 @ 0 and end of span 100 200 130 220

AR200 SpecificationsLaser 650 nm, Class II red visible diodePower 10 - 30 V D.C. (75 mA at 15V)Resolution +/- 0.03% of measurement range (span)Operating Temperature -10 to 60°CWeight (less cable) 85 g (3 oz.)Enclosure meets NEMA-4 and IP-67 requirementsSample Rates, configurable maximum BLE off 1250 samples / sec BLE on 600 samples / sec minimum 0.2 samples / sec or sample on requestCable Length 2 mCable Configuration 8 conductor, Power and serial Data cableRegulatory

AR200 OutputsOuput formats may be selected using device pushbuttons or throughserial commandsAnalog signals

4 - 20 mA Configurable zero and span points 0 - 10 V Configurable zero and span pointsLimit Switch signals 150 mA with short-circuit protection Two NPN (sinking) Two PNP (sourcing)Serial Output RS-232 Full Duplex 1200 - 230 K baud RS-422 Half Duplex 1200 - 230 K baud, 1200 m max. RS-485 Multidrop 1200 m max.regardless of termination resistor Serial Output Format Binary 3 bytes / sample, 0 - 50K over full scale span

Hex FF terminated ASCII Up to 11 bytes / sample, terminal readable

The AR200 family of triangulating laser displacement sensors has four modelsto satisfy your range requirements with excellent resolution and sensitivity. Themost accurate model measures distances over 6 mm with a resolution of 2 µm. Thelongest range AR200 sensor measures to 50mm with a resolution of 17 µm.

AR200 Sensitivity for typical surfacesand relative amounts of diffuse lightMost surfaces reflect light in two ways. Some lightis diffusely scattered over wide angles and someis reflected specularly, as from a mirror. Diffusereflections are typically used for measurement,since they scatter widely and can be detectedwithout precise alignment. The AR200 boasts greatsensitivity to small amounts of the diffusecomponent from shiny surfaces. Versions of theAR200 sensor can measure many materials usingeither specular or diffuse reflections.

Sensitivity (normalized)for minimum target reflectance

at 20 Hz at 1.25 KHzAR200-6 .00003 .003AR200-12 .00003 .003AR200-25 .00006 .006AR200-50 .0008 .008

Examples of diffuse scattered light fromvarious materials

Diffuse Max sample Material Reflectance rate (Hz)

(normalized)

White Paper 0.85 1250Unpolished Metals 0.2 - 0.5 1250 (iron, steel)Wood (various) 0.1 - 0.7 1250Flat Black Paint 0.03 1250Gloss Black Paint 0.003 600 or plasticPolished Metals 0.8 - 0.0005 1250 - 100 (Al, st. steel)Clear glass 0.0004 100 (polished fused silica)Laser Mirror 0.0004 100

Principles of OperationThe AR200 sensors project a beam of visible laser light that creates a spot on a target surface. Reflectedlight from the surface is viewed from an angle by a line scan camera inside the AR200 sensor. Thetarget’s distance is computed from the image pixel data. The AR200 can not be overloaded and measuresaccurately even when a mirror reflects the entire light beam back to the detector. Likewise, on surfacesof polished glass or water, almost the entire beam passes through or is reflected away. The AR200sensors can measure distance from the small remaining scattered light.

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DefinitionsTarget Standoff Distance: Distance from the face ofthe sensor to the middle of the measurement range.Measurement Range (Span): Working measurementrange defined as the distance range over which thesensor will reliably measure displacement.Resolution: Smallest change in distance that a sensorcan detect. Stated as +/- % of the measurement range.Linearity: The largest deviation from a best-fit straightline over the measurement range, created by data fromthe sensor with reference taken from a true distancescale. Stated as +/- % of the measurement range.Sample Rate: Rate that data samples are obtainedfrom the sensor. The maximum attainable sample rateis determined by the selected operating mode and targetreflectance.Background Light Elimination (BLE): A user-selectedoperating mode that improves measurement in brightsurroundings by capturing an image with the laser offand subtracts it from the image taken with the laseron. Sample rates are lowered as a result.Sensitivity: A measure of the relative ability to detectsmall amounts of reflected light. The better thesensitivity, the higher the attainable sample rate onsurfaces such as glass, gloss black paint or shiny plastic.

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40°

20 mm(.80")

64 mm(2.53")

2.8 mm(.11")

48.5 mm(1.91")

2.8 mm(.11")

21 mm(.83")

9 mm(.34")

69.8 mm(2.75")

54 mm(2.13")

LaserAxis

CameraAxis

O.D. 6.3 mm (.25") Cable,8 Conductor

Laser &CameraWindow

2 Mounting HolesM3 (#4) through3mm (.120") Dia

BLKYEL

GRN

GRN

YEL

120 ohm

YEL

GRN

RS-232RS-422/RS-485 Term RS-485

2

RED

BRN

1

ORNG

2

BRN

BLK1

ORNG

PNP LSNPN LS

-+

ORNG

BRN

0-10 VDC

BRN

ORNG

4-20 mA

0 VDC: LASER Disabled

0 VDC: Buttons Disabled

12-30 VDC

Open: LASER Enabled

Open: Buttons Enabled-+RED

WHT

BLUBLK AR-200-6

AR-200-12AR-200-25AR-200-50

MODEL No.

S/N:

COMPLIES WITH 21 CFR1040.10 AND EN60825-1:2001

AcuityR E S E A R C H

Mechanical Dimensions

AR200 Inputs AR200 sensor command set: Set Zero Point (Configurable anywhere in measurement range.)

Set Sample Interval between 0.2 to 1250 samples / sec Continuous sampling or Sample on command Set Span Point: either side of zero point Background Light Elmination ON / OFF Send Zero / Send NO update if NO measurement Serial and Current Loop output Enable / Disable Save / Retrieve Configuration settings Select: Serial, Analog or Limit Switch configurations

Take Single Sample

AR200 Signal and Power InterfaceThe table below shows the wiring of AR200 sensors ordered without power supplies.

Red Power, +15V (12-30 VDC) Black GroundBlue Switches DisableWhite Laser DisableShield Ground at supply end

Function: 4-20 mA 0-10V NPN LS PNP LSOrange CL Out Voltage Output NPN 1 sink PNP 1 sourceBrown CL RTN Voltage RTN NPN 2 sink PNP 2 source

Function: RS422/RS485 (term) RS485 (unterm) RS232YellowYellow TxData+/RxData+ TxData+/RxData+ RxDataGreen TxData-/RxData- TxData-/RxData- TxData

Rev.8/03 Page 42003 Schmitt Measurement Systems, Inc.

AR200 Sensor OptionsPower Supply: Universal AC power supply. 100-240 V, 50 - 60 HzDisplay: Encased display with bright green characters, 9 mm high for output from AR200 in mm or in. Dimensions: 246.4 x 71.1 x 116.8 mm (L x H x D) with a 78.7 mm flange.

Acuity is the leader in laser sensor development. If our standard products do not exactlymeet your needs, please call us with your requirements. We are happy to design a sensor toyour range, accuracy and size constraints. For example, our products can be configured todetect multiple surfaces of transparent materials. Our custom configurations provede thegreatest flexibility for your specialized applications.

AccuRange 4000 sensorseries with 0 - 54 footrange and 0.1 inchaccuracy

AccuRange 600long-range modelswith spans of 20, 32and 50 inches

AccuRange 600 shortand medium rangemodels with spans of1/8, 1/4, 1/2, 1, 2 or4 inches

The following label appearson all AR200 models. Thisproduct complies with21CFR 1040.10 and1040.11. Specificationssubject to change withoutnotice.

A division of Schmitt Measurement Systems, Inc.2765 NW Nicolai St.Portland, OR 97210Tel: 650-369-6782 Fax: 650-369-6785www.acuityresearch.com

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