LEDs enable much greater control of the lighting quality than the technologies they are rapidly replacing. Many international standards now specify requirements for internal and external lighting systems in terms of both ‘quality’ and ‘quantity’ of light as well as in terms of efficiency and life time. Photometry in the lighting industry generally focuses on the intensity (i.e. illuminance) and color (i.e. correlated color temperature CCT and color rendering index CRI) of light falling on a surface. LED lamps are extremely versatile in terms of emission spectra, which is why spectral measurement of the illuminance and color has now become essential for any high-end light meters.
The MSC15 – compact, handheld, and low cost
The MSC15 from Gigahertz-Optik GmbH is a modern light meter whose technical concept allows for precise measurement of the illuminance spectrum, color, and color rendering. Its cutting-edge design concentrates on measurement accuracy rather than unnecessary esoteric electronic features which results in a high quality meter for an attractive price. The light sensor consists of a fast spectroradiometer that covers a spectral range between 360 nm and 830 nm (V-lambda range according to CIE S023) with a spectral bandwidth of 10 nm. The device also integrates an optical bandwidth correction feature (CIE 214) in order to further improve the quality of the values calculated based on the spectral measurement data. Another key feature that ensures accurate illuminance measurements of extended lighting conditions is its carefully designed field of view. Accurate illuminance measurements are only possible with a precise, cosine-corrected entrance optic. The MSC15 has an excellent cosine response (f2≤ 3 %), at the same time as offering a wide measurement range for illuminance and color between 1 lx and 350,000 lx. The colored touch screen of the device makes it extremely easy to use. Uninterrupted operation of more than 8 hours is provided by its lithium ion battery which is recharged via the USB 2.0. Remote control of the device and data read out are made possible by the supplied software.
Calibration of the MSC15
One essential quality feature of photometric devices is their precise and traceable calibration. The MSC15 is calibrated by Gigahertz-Optik’s calibration laboratory that is accredited by DAkkS (D-K-15047-01-00) for the spectral responsivity and spectral irradiance according to ISO/IEC 17025. Every device is supplied with its respective calibration certificate.
Additional functions of the MSC15
The MSC15 also includes additional functions for use in specialist fields of lighting.
For users interested in photosynthesis, the device includes an additional function for evaluating the illuminance effectiveness in plant growth through photosynthetically active photon flux density (PPFD) in µmol/m²s (400 nm to 700 nm). Standard: DIN 5031-10
Besides the measurement of lighting conditions, another feature that makes the device ideal for the clinical field is its ability to measure the blue light irradiation routinely used in the treatment of neonatal jaundice. Newborns whose jaundice levels exceed the thresholds are treated by irradiation with blue light that has an ideal wavelength of 459 nm (450 nm to 475 nm in practice). In order to minimize the side effects of the phototherapy, the MSC15 can be used to measure and regulate the bilirubin effective irradiance.
Options for the MSC15:
- Software development kit for integration of the device in the user’s own software
MSC15 for measurement of the illuminance, spectrum, color, and color rendering in the lighting industry
Touchscreen for intutive handling of the meter
Display of photopic lux, CCT and CRI Ra
Display of the spectral power distribution, photopic lux and CCT
Display of the CRI's
Display of photopic and scotopic lux and their ratio.
Display of PAR and the spectral power distribution
Display of Bilirubin and the spectral power distribution
Example measurement in the MSC15's software
Spectroradiometer for measurement of the illuminance, spectrum, light color, and color rendering
Mobile meter, spectroradiometer with a 10 nm optical bandwidth and additional optical bandwidth correction (CIE214), precise cosine field of view function, Lithium ion battery with over 8 operation hours
|Range of measurement||
1 lx to 350,000 lx, 360 nm to 830 nm
Precise spectral light meter for the lighting industry
Factory calibration. Traceable to PTB calibration standards
Handheld meter for illuminance and light color. Color-Touchscreen, simple intuitive Operation with clearly arranged display views.
(Class B according DIN 5032-7 or AA according to JIS C 1609-1:2006)
Color coordinates (x,y)
CRI (color rendering index)
Diffuser window with 10mm diameter, cosine corrected field of view, f2 ≤ 3 %
(360 - 830) nm
optical bandwidth correction applied according to CIE 214
|Measurement range typ. white LED||
(1 - 350000) lx
|Δx, Δy reproducibility||
|Δx, Δy uncertainty||
+/- 0.002 (Standard illuminant A)
|CCT Measurement range||
(1700 - 17000) K
+/- 50K (standard illuminant type A)
+/- 4% (depending on the LED spectrum)
Illuminance (standard illuminant A) +/- 3%
Illuminance (typ. LED) +/- 4%
(Traceable to national standard. Uncertainty of the standard is included)
Operation: 10°C bis +30°C
Storage: -10°C to +50°C
minimum 8h of operation
5VDC by USB
136 mm x 74 mm x 32 mm
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