UV is our Business

UV-REF-LED

Tool for PTB traceable calibration of UV sensors, consisting of
Current and temperature stabilized UV LED array
Precise sensor holder
PTB traceable transfer standard

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Con gusto le asesoramos sobre este producto

Romana Sonnenberg
Dipl.-Ing.

+49 (0) 30 53015211

Niklas Papathanasiou
Dr. rer. nat.

+49 (0) 30 53015211

Calibración UV FAQ

Does sglux offer ISO17025 accredited calibration?

sglux offers calibration according to ISO 17025 / DAkkS 71 SD 0 025, but is not accredited according to ISO 17025.

Is sglux’ calibration traceable to NIST standards?

sglux calibration is traceable to the German Nation Metrology Institute “Physikalisch Technische Bundesanstalt” PTB. PTB and NIST are contractual partners of the CIPM Mutual Recognition Arrangement (CIPM MRA), which is the framework through which National Metrology Institutes demonstrate the international equivalence of their measurement standards and the calibration and measurement certificates they issue.

What is the sglux calibration chain?

sglux calibration can be found here (link to pdf).

Where can I find the calibration certificates of sglux transfer normal?

sglux calibration certificates can be found here (link to folder with certificates).

What information does the calibration certificate contain?

A typical calibration certificate can be found here (link).

What calibration method is used?

In most cases calibration by substitution is performed. The calibration object or device under test (DUT) is measured at a UV source. At the same position a traceable reference measurement is performed e.g., with a spectroradiometer. The calibration of the DUT is only valid for UV sources with the same spectral emission. For other UV sources the spectral mismatch between spectral response of the DUT and the spectral emission profile must be calculated.

Do you offer calibration according to DVGW 294-3 / DIN 19294-3?

Yes, sglux offers calibration according to DVGW 294-3 / DIN 19294-3 for low pressure and medium pressure mercury lamps (LP/MP -Hg lamp) at a reference lamp system with LP-Hg irradiance of ~2 W/m² and ~40 W/m². The reference measurements are performed with traceable calibrated reference radiometer DVGW2.4 for LP-Hg lamp and DVGW04 for MP-Hg lamp. The measurement uncertainty (k=2) of these calibrations are 6 % for LP-Hg sensors and 9 % for MP-Hg sensors.

Do you offer lux / lumen calibration?

sglux could offer lux and lumen calibration but is specialized in irradiance calibration of UV detectors.

Which units can be calibrated with sglux?

sglux offers calibration of following units: - irradiance in W/m² between 200 nm and 1000 nm - spectral irradiance in W/m²/nm between 200 nm and 1000 nm - spectral irradiance response in A/W/m² between 200 nm and 1000 nm - illuminance in lux

What is the measurement range of the calibration?

For spectral irradiance the measurement range is 5E-3...2E5 W/m².

What is recommended recalibration interval for sglux UV sensors?

The recalibration interval depends on the specific use of the detector. In high irradiance applications and frequent use, the sensors should be calibrated more often. sglux recommends recalibration every 18 months.

What is the uncertainty of the calibration?

The measurement uncertainty depends on the wavelength range and irradiance level the detector is calibrated. Typical relative measurement uncertainties with a of 95% (k=2) are: 200 - 239 nm -> 10% 240 – 299 nm -> 8% 300 – 339 nm -> 6% 340 – 359 nm -> 5% 360 – 399 nm -> 4.5% 400 - 439 nm -> 5%