ST61, ST81Portable infrared thermometers

Non-contact temperature measurement

Raytek knows temperature, with decades of thermometry experience.

Today, we offer the latest in non-contact IR temperature test tools and application expertise. Here’s what the Raytek ST61 and ST81 offer you:• Laserguidedsightingsystemforeasytargetingwith1%accuracy• Datalogging—12pointsfortheST61,99pointsfortheST81• Advancedopticstomeasuresmallertargetsatgreaterdistances• Adjustableemissivityformoreaccuratetemperaturemeasurements• SelectableMAX,MIN,DIFandAVGfunctionsthatdisplayvaluesinstantlywithHi/LoAlarm

• Expandedmeasurementrange(seespecificationsonback)• Optionalprobeaccessoryavailablefordualcontactandnon-contact

temperature measurements

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Comparison chart ST61 ST81

IRtemperaturerange -32°Cto600°C(-25°Fto1100°F) -32°Cto760°C(-25°Fto1400°F)

Accuracy <0°C:±(1°C+0.1°/1°C);≥0°C:±1%ofreadingor±1°C,whicheverisgreater <32°F:±(2°F+0.1°/1°F);≥32°F:±1%ofreadingor±2°F,whicheverisgreater

Repeatability ±0.5%ofreadingor±1°C(2°F),whicheverisgreater

Displayresolution 0.1°C(0.1°F)

Spectral response 8μmto14μm

Responsetime(95%) <500ms

Distance:spot(90%energy) 30:1 50:1

Lasersighting Singlelaser,output<1mWClassII,wavelength630nmto670nm

Emissivity Digitallyadjustablefrom0.10to1.00by0.01orviabuilt-intableofcommonmaterials

Datastorage 20points 99points

Communication none none

Relativehumidity 10%to90%RHnon-condensingupto30°C(86°F)

Operatingtemperature 0°Cto50°C(32°Fto122°F)

Storagetemperature -20°Cto60°C(-4°Fto140°F)

Power 2-AA/LR6batteries(alkalineorNiCd) 2-AA/LR6BatteriesorUSBconnection whenusedwithaPC

Batterylife 12hourswithlaserandbacklighton; 100hourswithlaserandbacklightoff,at100%dutycycle(thermometercontinuouslyon)