Welltech Instrument Company LtdTel: 852-23491224 Fax: 852-26669436 Email: info@fbg.com.cn

FBG SensorBare FBGWeldable FBGEmbedded FBGTemperature FBGFRP-FBGPressure FBGDisplacement FBGAcceleration FBGEarth Pressure FBGRebar FBGLoad FBGTilt FBG

BARE FBG (BARE Fiber Bragg Grating Sensor)Application: Structural Health Monitoring, Strain Monitoring, Composite Strain Monitoring

We manufacturer bare FBG and supply to world wide, our FBG is specially designed for civil engineering, bridge monitoring, structural health monitoring. To measure microstrain, 1.2pm(0.0012nm)=1µε.

Bare FBG Strain Sensor• CenterWavelength:anywavelengthbetween1510to1590nm• GratingLength:10mm(standard),1mm,2mm,3mm,5mm,15mm• StrippingArea:30mm• FBGType:Apodized• StrainRange:+/-3000µε(+/-5000µε as option)• Tolerance:+/-0.5nm

• SLSR:>15dB• ProofTest:>100kpsi• Coating:none,acrylateorpolyimide• FiberType:AcrylateSMF-28eorPolyimideSMF28e(OFSBF04446)• PigtailLength:1m• OperatingTemperature:AcrylateSMF-28fiber(5-120degC),Polyimide SMF28e(-40to300degC)

BARE FBG

Bare FBG Noted: Suitable for strain or temperature measurement

WecanwritethemultiFBGononefiber,distancebetween the fbg can be followed by customer’s requirement.

Grating Reoating Thickness:1.Nocoating2.Acrylate3.Polyimide

FBG Array

GratingLength: 1mm 2mm 3mm 5mm 10mm 15mmReflectivity: >70% >70% >70% >75% >90% >90%Bandwidthat-3dB:nm <0.7 <0.7 <0.7 <0.6 <0.3 <0.25

FC/PC

FC/PC

2500mm 1523 1531

1548.2 1540.5

1534.2 15361

1534

700mm 750mm 750mm

750mm750mm 750mm

100mm

Cable:0.9mmloosentube Cable:PolyimideFiber

Cable:SMF28-eFiber Cable:3mmjumpercable

Pigtail (cable)

Ordering Code

WELDABLE FBGWeldable FBG (Weldable Fiber Bragg Grating Sensor)Application: Structural Health Monitoring, Strain Monitoring, Composite Strain Monitoring

The weldable FBG is specially designed for outdoor applications for strain monitoring, particularly on structure with weldable surface. The obvious featureofthisproductmakeitcanbeeitherfixedwiththeboltfortemporarilymonitoringorfixedbyweldingforlongtermmonitoring.Ithasadvantagesofeasy implementation, rugged and high reliability.

Weldable FBG Strain Sensor• CenterWavelength:anywavelengthbetween1510to1590nm• StrainRange:+/-3000µε (+/-5000µε as option)• Resolution:1µε• Installation:ArcWeldable• Dimension:65x35mm• OperatingTemperatureRange:-30to80degC•Option:withtemperaturecompensationdesign (i.e.built-in2fbginside,oneforstrainmeasurement,anotherfortemperaturecompensation)• Dimension:130x35mm

Example:• Model:FBG-Weldable-1540.5-L4AA-R10AA • WeldableFBGwithwavelength1540.5nm• Leftpigtail:ArmorcablewithFC/APCconnector,4mlong • Rightpigtail:ArmorcablewithFC/APCconnector,10mlong

Typical Calibration Curve Spectrogram

Ordering Code

EMBEDDED FBGEmbedded FBG (Embedded Fiber Bragg Grating Sensor)The embedded FBG is designed for embedded into the interior of the concrete, reinforced concreteor compositematerials. Its ruggeddesignensure longterm monitoring.

Embedded FBG Strain Sensor• CenterWavelength:anywavelengthbetween1510to1590nm• StrainRange:+/-3000µε (+/-5000µε as option)• Resolution:1µε• Installation:Embedded• Dimension:35x60mm(or35x100mm)• OperatingTemperatureRange:-30to80degC• Option:withtemperaturecompensation (i.e.built-in2fbginside,oneforstrainmeasurement, another for temperature compensation)• Dimension:35x130mm

Typical Calibration Curve

Ordering Code

TEMPER ATURE FBGTemperature FBG (Temperature Fiber Bragg Grating Sensor)Application: Temperature measurement

ThetemperatureFBGisdesignedtomeasuretheexteriorandinteriortemperaturesofvariousstructures,whichcanbeembeddedintotheinteriororstickonthesurfaceofthemeasuredobject.WecanfollowcustomerrequirementtomakeanyshapeoftemperatureFBG.

Ordering Code

Temperature FBG (Standard)• Wavelength:anywavelengthbetween1510to1590nm• TemperatureRange: -20to85degC (Option1:-20to150degC) (Option2:-50to85degC)• Resolution:0.1degC• Accuracy:1degC• Fiber:SMF-28orcompatible• Dimension:Φ8x100mm

Temperature FBG (Ceramic Type)• TemperatureRange:-20to85degC(-20to150degCasoption)• Resolution:0.1degC• Accuracy:1degC• Fiber:SMF-28orcompatible• Dimension:40x10x5mm

Temperature FBG (Ceramic Type)• TemperatureRange:-20to85degC(-20to150degCasoption)• Resolution:0.1degC• Accuracy:1degC• Fiber:SMF-28orcompatible• Dimension:40x4x5mm

Temperature FBG (Bare Type)• TemperatureRange:-20to250degC• Resolution:0.1degC• Accuracy:1degC• Fiber:SMF-28orcompatible

FRP FBGFiber Reinforced Polymer FBG (FRP FBG)TheFRPFBGisdesignedfordisplacementmeasurement

• GlassFRP• CarbonFRP FRP-FBG Strain Sensor• Wavelength:anywavelengthbetween1525to1565nm• SensingLength:12mm• StrainRange:>5000µε• Accuracy:<0.1%(about2-3ue)• Resolution:1ue• Repeatability:<0.5%• Linearity:<0.5%• Reflectivity:>90%• SideLobeIsolation:>15dB• Length:50mmto2m(or>2m),pleasespecifywhenordering• Material:GlassorCarbonFiberReinforcedPolymer• Type:EmbeddedTypeorWeldableType

Typical Calibration Curve

Ordering Code

PRESSURE FBGPRESSURE FBG (Pressure Fiber Bragg Grating Sensor)

Fiber Reinforced Polymer FBG (FRP FBG)ThePressureFBGisdesignedforwaterlevelmonitoring

Pressure FBG • PressureFBGSensor• Range:0.35, 0.7,1,2,3,5,7or10Mpa• Dimension:26x164mm(option:12mmx164mm)• Accuracy:0.3%F.S.• Resolution:0.05%F.S.• Wavelength:1510to1590nm• WorkingTemperature:-30to70degC(option:upto150C)• TemperatureCompensatedpressuremeasurement.(i.e.onewavelengthforpressurefbg)

Option:• Dualwavelengthoutput:onefortemperature,oneforpressure Ordering Code

Displacement FBG (Displacement Fiber Bragg Grating Sensor)The displacement FBG is designed for displacement measurement

Displacement FBG • Wavelength:anywavelengthbetween1510to1590nm• StandardRange:100mm• Accuracy:1mm• Reflectivity:>90%• WorkingTemperature:-30to80degC

DISPL ACEMENT FBG

Ordering Code

Typical Calibration Curve

Acceleration FBG (Acceleration Fiber Bragg Grating Sensor)

Suitable for vibration, security sensingApplication: bridge monitoring, pipeline security monitoring

Acceleration FBG SensorType1:• Range:5g• FrequencyRange:0-40Hz• Dimension:72x54x37.5mm Type2:• Range:0.5g• FrequencyRange:>100Hz• Dimension:54x48x24.5mm • Wavelength:1525to1565nm• WorkingTemperature:-30to70degC

ACCELER ATION FBG

1538.4

1538.2

1538

1537.8

1537.6

1537.4

1537.2

1537

1536.8

1536.6

1536.4

1 87 173 259 345 431 517 603 689 775 861 947 1033 1119 12051291 1377 1463

Ordering Code

Earth Pressure FBG (Earth Pressure Fiber Bragg Grating Sensor)TheEarthPressureFBGisdesignedforearthpressuremeasurement

Earth Pressure FBG Sensor• Dimension:160mmdia,25mmthickness• WavelengthRange:anywaywavelengthbetween1510to1590nm• Measurerange:0.6MPa• Accuracy:3%• Resolution:0.66%• Repeatability:<1.32%• Linearity:<0.66%• Reflectivity:>90%

EAR TH PRESSURE FBG

Ordering Code

Calibration Curve

Rebar FBG (Rebar Fiber Bragg Grating Sensor)TheRebarFBGisdesignedformeasuringstrainsinfoundations,slurrywalls,precastpiles,caissons,bridgeabutments,tunnel liners, etc.

Rebar FBG Sensor• Range:200MPa• Accuracy:<=1%• Resolution:<=0.1%F.S.• Wavelength:1525to1565nm• WorkingTemperature:-30to70degC• RebarDiameter:12mmor25mm

REBAR FBG

Ordering Code

Wavelength VS Temperature Curve

LOAD FBG

Load FBG (Load Fiber Bragg Grating Sensor)TheLoadFBGisdesignedformeasuringload,maximumupto 1000ton is available

Load FBG Sensor• Range:100,300,500,700,1000,2000,3000ton• Wavelength:1525to1565nm• Accuracy:0.3%F.S.• Sensitivity:0.05-0.1%F.S.• Reflectivity:>85%• WorkingTemperature:-30to70degC

Ordering Code

The tilt FBG is designed for tilt measurement

Tilt FBG Sensor• Range:+/-5deg • Dimension:90x70x27cm• Withtemperaturecompensation• Wavelength:1525to1565nm• Resolution:0.01%F.S.• Accuracy:1%F.S.• WorkingTemperature:-25to80degC

TILT FBG ( Tilt Fiber Bragg Grating Sensor)

Ordering Code

A Wavelength

B Wavelength