Your material end-use conditions determine which type of UV lamp you should use. All QUV lamps emit primarily ultraviolet light rather than visible or infrared light. The power of the UV lamp is equivalent to an ordinary 40-watt fluorescent lamp. However, the total UV energy emitted by each different type of lamp is different, and the spectral distribution is also different. UV lamps can generally be divided into UVA and UVB, depending primarily on the region where most of the output spectrum is located.
UVA lamp
UVA lamps are especially suitable for comparative testing because UVA lamps do not contain any ultra-short UV light 
below the 295nm cut-off point of sunlight. His destructive effect on materials is slower than that of UVB lamps. However, it correlates better with outdoor exposure results.
UVA-340
UVA-340 simulates the critical short-wave ultraviolet region of sunlight from 365nm to the cut-off point of 295nm very well . It has a peak at 340nm. UVA-340 is especially useful for comparative testing of different compositions.
UVA-351
UVA-351 simulates the ultraviolet portion . Suitable for aging testing of indoor products such as certain inks and polymeric materials placed adjacent to windows.
UVB lamp
UVB lamps emit the shortest . Therefore, fluorescent ultraviolet UVB lamps are widely used in QC and R&D departments for more rapid and effective testing. Since all UVB lamps emit non-naturally occurring short- wave ultraviolet rays below the 295nm stop point in sunlight, the results . We offer two types of UVB lamps that deliver different amounts of radiation but produce the same waveform of UV wavelengths.
UVB-313EL
Compared with QFS-40 lamp, UVB-313EL is more suitable for QC and R&D applications and testing of durable materials. UVB- 313EL emits higher UV output for faster test results and is also very stable.
UVB-313EL is an alternative product of UVB-313, which can provide more output stability. The solar eye light intensity control system can simulate the QFS-40 lamp by reducing the irradiated light intensity of UVB-313EL. This prolongs the life of the lamps and reduces the cost of lamp replacement.
QFS-40
Called FS-40 or F40 UVB, this is an early QUV lamp. FS-40 lamps have been used for many years. In many automotive testing standards, especially paint , there are still regulations to use QFS-40 lamps. QFS-40 is only suitable for QUV/basic models.
Lamp recommended application
| UVA-340 | Especially suitable for comparative testing of different formulations. Recommended for correlation testing of most plastics, textiles, coatings, pigments and UV stabilizers . Suitable for comparison with outdoor exposure results |
| UVB-313EL | Suitable for QC and R&D applications, recommended for some durable materials, such as: roofing materials and some outdoor coatings. |
| QFS-40(F40 UVB) | Automotive exterior paint |
| UVA-351 | For UV simulation of sunlight through glass. Recommended for some automotive interior parts, textiles and inks. |
Note: Do not mix different types of lamps
Mixing different types of lamps in a QUV will make the light source inconsistent on the sample , which will produce streaks of different shades on the sample.
Solar Eye Irradiance Control
Both the QUV/se and QUV/spray are equipped with a solar eye irradiance control system. The controller continuously monitors the UV intensity with four sensors in the same plane. The feedback loop system can automatically compensate the light intensity changes caused by the aging of the lamp or other factors by adjusting the power of the lamp. The Solar Eye automatic irradiance control system has better reproducibility and repeatability than manual irradiance control systems such as the old QUV or QUV/basic.
high irradiance
With push-button irradiance settings, you can have the solar eye operate , and keep relatively realistic test conditions. For example : with UVA340 lamps, you can make the solar eye simulate the following daylight conditions.
Typical conditions: Fast results without sacrificing relevance; with UVA340 lamps, this irradiance level is equivalent to midday summer sunlight.
Enhanced conditions (1.75X): 75% higher than the intensity of summer noon sunlight for faster results.
