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Our laboratory offers accredited calibration services for illuminance meters (luxmeters), UV A meters, UV C meters, and spectrophotometers. Calibration is a critical process to ensure the reliability of measuring instruments, conducted at the highest standards in our laboratory.
What is Optics?
Optics is a branch of science that studies the nature of light and its interactions with matter. The visible region of the electromagnetic spectrum is defined as light and ranges from 400 to 750 nm in wavelength. Devices that measure illuminance in this range are called luxmeters, and the measurement unit is "Lux." The calibration of luxmeters is performed according to the BS 667 (Illuminance meters, Requirements and Test Methods) standard. In our laboratory, accredited calibration is conducted in the range of 20 lux to 5000 lux using the substitution method.
Usage of UV Meters
The UV (ultraviolet) region, which the human eye cannot perceive, ranges from 280 to 400 nm in wavelength and is divided into three main areas: UV A (320 - 400 nm), UV B (280 - 320 nm), and UV C (100 - 280 nm). UV A meters are used to investigate the effects of UV A radiation on human health, conduct non-destructive testing, environmental monitoring, and in solar energy systems. Calibration of UV A meters is carried out according to the CIE 220 standard, and our laboratory provides calibration services in the range of 15 µW/cm² to 6000 µW/cm².
UV C meters are used to measure UV C radiation in fields such as disinfection, sterilization, water treatment facilities, ventilation systems, and food processing. Calibration of UV C meters is also performed according to the CIE 220 standard, within the range of 80 µW/cm² to 150 µW/cm².
The Role of Spectrophotometers
A spectrophotometer is a device that examines the interaction of light with matter. When light interacts with matter, it can either be absorbed or transmitted. The absorption of light by matter is called "absorbance," while the passage of light through matter is termed "transmittance." Spectrophotometers vary depending on their light source, typically having two types of light sources: one that emits visible light and another that emits UV light. During the calibration process, wavelength verification is performed in the range of 270 nm to 900 nm, and photometric verification measurements are conducted between 0.1 Abs and 2 Abs. These calibrations are carried out both in our laboratory and at the customer's site.