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Emissivity of Most Common Materials
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Emissivity of Most Common Materials
From Raytek Corporation
 

 

Emissivity is the measure of an object's ability to emit infrared energy. Emitted energy indicates the temperature of the object. Emissivity can have a value from 0 (shiny mirror) to 1.0 (blackbody). Most organic, painted, or oxidized surfaces have emissivity values close to 0.95. Majority of Raytek sensors have adjustable emissivity feature to ensure accuracy when measuring other materials such as shiny metals.

If you are using a thermometer with a fixed, preset emissivity of 0.95, and need to measure a shiny object you can compensate by covering the surface to be measured with spray oil, flat black paint or masking tape. Measure the temperature of the taped or painted surface. That is the true temperature.


Products & Services
Noncontact infrared temperature sensors absorb ambient infrared (IR) radiation given off by a heated surface. They are used in applications where direct temperature measurement is not possible.
Linear velocity sensors measure the linear velocity of an object using either contact or non-contact techniques.
Flexible heaters are devices that can be molded to the shape of a heated object.
Duct heaters are used to heat moving gas streams.
Specialty or proprietary products and accessories related to spectrometers.
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Product Announcements
Raytek Corporation - Marathon MM 3M Infrared Thermometer
The Marathon MM 3M measures low-to-medium temperatures with more accuracy regardless of changing emissivity. This innovative sensor was specifically designed to meet temperature measurement challenges... (read more)
CEM Shenzhen Everbest Machinery Industry Co., Ltd - BX-350/500 Portable IR calibrator
BX-350/500 portable Ir calibrators are used to calibrate long distance Infrared thermometer, which are designed as handhold and small calibrators. (read more)
Sentry Optronics Corp. - ST640 intelligent non-contact infrared thermometer
The ST640, ST642, ST643 are the intelligent non-contact infrared thermometer. Beyond the conventional temperature measuring instruments, two novel functions are build-in. (read more)
Fotronic Corporation / Test Equipment Depot - Extech 42530 Infrared Thermometer w/ Laser Pointer
Extech's Non-contact InfraRed Thermometers point and measure technology provieds fast, easy and accurate reading for most surface temperature measurements. (read more)
Tempil, Inc. - Infrared Thermometer - Tempil IRT-16 Xtreme Duty
From the world's most trusted name in accurate, reliable temperature measurement technology...Tempil. Introducing the Tempil IRT-16 Xtreme Duty, the industry's most advanced, non-contact infrared... (read more)
Palmer Wahl Instrumentation Group - M20 Fixed IR Thermometer
All M20 models feature: • Single-Wire Interface • Target Sizes from 1/2 mm • Micropower Circuitry • 100% Field Interchangeable • All Common Outputs • Extremely... (read more)
Storage Battery Systems, Inc. - Infra-Red Thermometer w/Laser Aiming - SBS-IRT5
SBS offers the IRT-5 for the critical power services professional to evaluate the thermal condition of dc & AC terminals, conductors, housings, windings, contacts & protective devices. The IRT5... (read more)
 
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Topics of Interest
nderstanding an object's emissivity, or its characteristic "radiance" is a critical component in the proper handling of infrared measurements. Concisely, emissivity is the ratio of radiation emitted... (Read More)
Infrared Thermometer: What is an Infrared Thermometer? An infrared thermometer is a non-contact temperature measurement device. Infrared Thermometers detect the infrared energy emitted by all... (Read More)
There has been little discussion about infrared (“IR”) thermography’s ability to determine the temperatures of heating liquids and gas within piping assemblies. Determining accurate emissivity values... (Read More)
Accurately evaluating either gas absorption or emission is a very complicated matter that involves quantum physics. The spectral nature of gaseous matter attributes to this complexity. To avoid... (Read More)
Infrared is an invisible portion of the light spectrum extending from 0.75 to1000 microns. Any object warmer than absolute zero (0 degrees Kelvin) emits energy somewhere within that range. An infrared... (Read More)
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Technical Articles
Emissivity of Most Common Materials - Temperature Sensing
Infrared Technology - Temperature Sensing
Optical Dictionary - Light Sources
Spotlight on Roofs - It's That Season Again! - Video Cameras and Accessories
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See more product announcements for Noncontact Infrared Temperature Sensors
micro IRt/c

micro IRt/c
Exergen Corp.


42510A 1200°F (650°C), 12:1, Mini IR Thermometer

42510A 1200°F (650°C), 12:1, Mini IR Thermometer
Extech Instruments Corp.


Marathon FR Infrared Thermometer

Marathon FR Infrared Thermometer
Raytek Corporation


11 See more product announcements for Noncontact Infrared Temperature Sensors



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