Precision Infrared Radiation Temperature Measuring Instrument
● The unique air curtain technology prevents condensation from forming on the cavity surface during long-term low-temperature operation. The air curtain also acts as a thermal insulation layer, reducing heat loss and improving temperature stability.
● The super-large diameter cavity can accommodate most D:S radiation thermometers. It is a professional calibration equipment for calibrating various radiation thermometers.
Blackbody Calibration Source Product Selection Table
| Product numbe | DTR-50NG | DTR-30NG | DTR-800G | DTR-1200G | DTR-1600G |
|---|---|---|---|---|---|
| Temperature range (°C) | -50~100 | -30~100 | 50~800 | 100~1250 | 500~1600 |
| Emissivity | 0.998 | ||||
| Orifice size | φ65 | Φ50 | |||
| Temperature control stability (℃/10min) | ≤0.1 | ≤ (0.1 and 0.1%t greater) | |||
| Target surface Uniformity（℃） | ≤0.15 | The greater of 0.15 and 0.15%t | |||
| Resolution (°C) | 0.01 | 0.1 | |||
| Dimensions (mm) | 850×550×1100 | 550×600×800 | 730×780×1470 | ||
| Product numbe | DTBF-50G | DTM-3050BSG |
|---|---|---|
| Temperature range (°C) | 30~50 | 30~50 |
| Emissivity | 0.997 | 0.95 |
| Orifice size | Φ60 | 70×70 |
| Temperature control stability (℃/30min) | ±0.01 | ±0.05 |
| Dimensions (mm) | 358×154×251 | 140×250×180 |
| Product numbe | DTSE-50G | DTSE-50G |
|---|---|---|
| Temperature range (°C) | 0~50(32~42) | 0~100 |
| Emissivity | 0.999 | 0.999 |
| Orifice size (mm) | Φ10 / φ50 | φ130 |
| Temperature control stability (℃/10min) | ±0.01 | ±0.01 |
| Dimensions (mm) | 660（L）×540(W）×1120（H） | |
Blackbody Calibration Source: Guide
In this guide, you will learn all about.
1: What is a Black Body Radiation Source?
A black body radiation source is a theoretical object that absorbs all incident radiation and emits energy solely based on its temperature. In practical terms, black body radiation sources are engineered devices used to simulate the behavior of an ideal black body. They emit radiation following a predictable spectrum, making them highly valuable in applications where precise temperature measurements are crucial. These sources are frequently used in fields such as meteorology, infrared thermometry, and various industrial sectors, as they enable accurate temperature calibration of measurement instruments.
2: Principles and Characteristics
The functioning of a black body radiation source is rooted in fundamental physical laws, particularly Planck's law and Stefan-Boltzmann law. According to these laws, the radiation emitted by a black body follows a specific distribution of wavelengths that directly depends on its temperature.
As the temperature increases, the peak of the emitted radiation shifts towards shorter wavelengths. This predictability is one of the main reasons black body radiation sources are so effective for calibration purposes.
Additionally, black body sources are known for their high accuracy, stability over time, and wide temperature range, which makes them suitable for a variety of scientific and industrial applications. Their designs are often traceable to international standards, ensuring that they provide reliable, consistent data.
3: Why Black Body Sources Are Calibration Standards for Infrared Thermometers?
Infrared thermometers rely on radiation to measure temperature from a distance. Since black body radiation sources emit a predictable spectrum of radiation, they serve as ideal calibration standards for these thermometers. Their ability to cover a wide temperature range and their inherent accuracy make them indispensable in ensuring the precision of infrared temperature measurements. Additionally, compliance with international standards when using black body sources ensures that measurements are consistent and reliable across various applications and industries.
4. Types of Black Body Sources
There are several types of black body radiation sources, each with distinct features:
- Fixed-Point Black Body Sources: These are designed to emit radiation at specific, well-known temperatures, providing extremely high accuracy. They are often used in applications where precise, traceable temperature measurements are critical.
- Variable-Temperature Black Body Sources: These devices offer a broad range of temperature settings, making them versatile and cost-effective for various calibration needs, though they require careful calibration to maintain accuracy.
- Cavity Black Body Sources: These sources are designed to provide uniform radiation, which is particularly important for achieving high accuracy in measurements. They are stable when maintained at thermal equilibrium.
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Integrating Sphere Black Body Sources: These are known for providing uniform radiance, which is essential in radiometric measurements. However, they may have lower stability compared to other types.
5: Advantages and Disadvantages
Each type of black body source comes with its own set of advantages and disadvantages:
- Fixed-Point Sources: The main advantage is their high accuracy and traceability to established standards. However, their limited temperature range and high cost are notable drawbacks.
- Variable-Temperature Sources: These are more flexible and cost-effective, covering a wide range of temperatures. However, they tend to offer lower accuracy and require frequent recalibration.
- Cavity Sources: They provide excellent radiation uniformity and stability at thermal equilibrium, but their temperature range is limited and they require ongoing maintenance.
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Integrating Sphere Sources: Known for their excellent radiance uniformity, they are versatile but have limited stability and range.
6: Main Parameters
Key parameters to consider when using black body sources include the temperature range, emissivity, radiance uniformity, stability, precision, and aperture size. These factors directly impact the accuracy and reliability of the measurements.
7: Impact on Accuracy and Reliability
The use of a black body radiation source significantly enhances the accuracy and reliability of infrared temperature measurements. Calibration precision ensures that the instruments used in various industries, such as medical diagnostics or environmental monitoring, provide accurate and consistent readings. This reduces uncertainty in measurements and guarantees traceability to recognized standards.
8: Calibration Methods
- Radiation Calibration: In this method, the emitted radiation is compared with reference standards using radiometers and spectrometers.
- Contact Thermometer Calibration: This method involves using a thermometer to directly measure the temperature of the black body source, providing a more direct calibration.
9: Applications
Black body radiation sources have numerous applications across industries:
- Industrial: They are used to calibrate sensors in steel and glass manufacturing.
- Scientific: Laboratories rely on black body sources to ensure the accuracy of instruments used in research.
- Medical: These sources are used to calibrate medical devices, ensuring accurate diagnostics.
- Environmental: They play a role in climate research and weather forecasting.
- Military: Black body sources are used to calibrate thermal imaging devices for improved defense equipment.
10: Infrared Instruments Calibrated by Black Body Sources
Instruments commonly calibrated using black body sources include radiation and infrared thermometers, thermal cameras, radiometers, heat flow meters, and spectrum analyzers.
11: Using a Black body when Developing New Equipment
A black body source is particularly useful for developing new technologies that deal with thermal imagery because they deliver consistent and expected resuits. The black body radiation thev produce is well behaved and in accordance to the parameters that the developer sets.
When developing a new method of thermal imaging, this alows for the accuracy of the technoloay to be tested to values as accurate as the black body radiation source will allow.
The main reason accuracy is so important revolves around the delicate nature of military electro-optical technology. A areatel range, such as the -409C to 12009C range that the black bodies from Cl Systems provides, allows for imaging technology designed to find man-made installations in extremely cold climates to developing optics capable of being used with satelites to inspect for weapons of mass destruction.
The accuracy of these machines to produce black body radiation influences the results that the developer can expect. This helps to eliminate false positives while ensuring the technology can accurately determine valid results.
12: Black Body Radiation Generation
Black body radiation is electromagnetic radiation that is emitted by an object that is in thermodynamic equilibrium. An obiect is considered a perfect black body when it absorbs all of the incoming liaht and does not reflect any.
It appears perfectly black at room temperature. At any given temperature the amount of radiation a black body emits is the maximum amount possible at that temperature.
In theory a black body emits energy in the fulspectrum of wavelengths, whether in the ultraviolet, visible,infrared spectrums as well as other wavelenaths. Essentially the black body emits a known amount of energy for an infinite number of wavelengths. This enables to draw the expected black body radiation curve for a given temperature.
Diferent obiects radiate diferently at temperatures and wavelenaths based on their emissivity. No one material is truly an idea black body radiation source. This radiation can be measured by sensors that are sensitive to the temperature diferences in the captured data. By processing this data, an image can be produced that displays a thermal mapping. When combined with optics a thermal image of the surrounding area is generated. The process for generating images uses a FllR detection model. A FLlR is an acronym for Forward Looking lnfra-Red technology. This technology is the basis for thermal imaging.
Conclusion
Black body radiation sources are critical for ensuring accurate infrared temperature measurements across various industries. Their ability to provide predictable, traceable, and stable radiation makes them the ideal calibration standard for a wide range of instruments. For further information or to inquire about our black body radiation sources, please feel free to contact us.
