Mavospec Base M521G

2,497.81€ *
Net price: 2,099.00€

Prices incl. VAT plus shipping costs

Delivery time 3-6 months*


Mavospec Base M521G - Spectrometer from Gossen MAVOSPEC BASE is a miniaturized spectrometer... more

Mavospec Base M521G - Spectrometer from Gossen

MAVOSPEC BASE is a miniaturized spectrometer for the everyday measurement of all conventional and modern light sources such as LEDs or OLEDs. All characteristic measured variables such as illuminance, most similar colour temperature, colour rendering indices, colour coordinates according to various CEI standards, colour purity, flicker, spectral power distribution, peak wavelength and dominant wavelength are determined from the measured spectrum and displayed on the colour display, which is easy to read for experts and laymen alike. Operation is user-friendly and intuitive via ring controller and a few keys.
Versatile application possibilities and a wide range of applications make the MAVOSPEC M521G a reliable partner for the lighting specialist when selecting, adjusting, checking, detecting, comparing, evaluating the light and colour quality of different light sources or from different manufacturers.
Application daylight, LEDs, halogen, etc.
Illuminance Evis 10 lx - 100 000 lx
Color temperature CCT 1600 K - 50 000 K (Duv > - 0,1)
Color temperature difference
zum Planck's curve Duv
(1600 K < CCT < 50 000 K)
Color rendering IES TM-30-15 Rf, Rg
Color rendering-index CRI according to CIE 13.3 Ra, Re, R1 - R15
Gamut Area Index GAI -
Peak Wavelength -
Dominant wavelength according to CIE 15 -
Color purity -  according to CIE 15 -
Color port coordinates[u,v] according to CIE 1931 -
Color port coordinates[u,v] according to CIE 1976 -
Color port coordinates[u,v] according to CIE 1960 -
Flicker - Index 0,00 - 1,00 (f < 400 Hz and Flicker % > 2,5 %)
Flicker - percentage 2,5 % - 100 % (f < 400 Hz)
Flicker - frequency 2 Hz - 6000 Hz (Flicker % > 2,5 %)
Configurable measured value display -
Switchable units lx / °C -C? fc / °F
Sensors Measuring tolerances MAVOSPEC BASE
Sensor CMOS image sensor, 256 pixels
Light entry area diffuser  F 7 mm
Distance between diffusor and measured area 25 mm
Error limit - cos fidelity rating (f2') = 3,00 %
Spectral Range 380 - 780 nm (VIS)
Half Value Bandwidth FWHM = 15 nm (typical 12 nm)
Physical resolution ~ 1,72 nm
A/D converter 16 bit
Wavelength reproducibility ± 0,5 nm
Integration time automatic, manual 10 ms - 3000 ms
Signal to Noise Ratio 1000:1
Diffuse reflection -25 dB
Dark current compensation automatically via temperature sensor
Measurement uncertainty Illuminance* ± 3 %
Reproducibility of color location* ± 0,0005
Uncertainty of measurement CCT* ± 2 %
Uncertainty of measurement TM30* ± 1,5 %
Uncertainty of measurement CRI* ± 1,5 %
Uncertainty of measurement Flicker* ± 1,5 %
* Standard illuminant A, 2856 K @ 1000 lx  
Operation, interfaces, memory MAVOSPEC BASE
Display 2.1? Colour TFT 320×240
Operating elements 3 keys, ring controller
Interface USB 2.0
Interface Protocol disclosed
Data memory 4 GB Micro SD / 500.000 measurements
Storage mode Manual, Auto
Data format CSV
Product specifications are subject to change without notice
- included in the scope of functions
Miscellaneous MAVOSPEC BASE
Plug-in power supply 100-240 V (50/60 Hz) 0,15 A, 5 V,
1 A (DC) USB socket
Power supply via USB connection -
Battery Li-Ion 3,7 V - 890 mAh
Automatic shutdown programmable, display + device
Battery Life = 8 h continuous operation
Charging time with power supply 1,5 h
Operating temperature 5 - 40 °C
Dimensions [H x W x D] 139 mm x 60 mm x 30 mm
Weight 150 g
Scope of delivery Instrument, cover cap, battery V070A, USB cable, power supply, aluminium case, neoprene case, carrying line, calibration protocol, manual German / English, 4 GB Micro SD card with EXCEL evaluation and manuals in German / English / French / Italian / Spanish as PDF, SD adapter

Spectral power distribution

represents the radiant power of a light source for a wavelength or wavelength band in the visible range. It provides information about the colour characteristics and can be used to compare the colour composition of different light sources. The colour rendering property can also be derived from this, because missing or reduced areas in the spectrum cause errors in colour rendering.

Color rendering index

Ra is a measure of the colour rendering properties of lamps whose theoretical maximum value is 100. The higher the colour rendering index, the better the colour rendering properties of the lamp. The most natural colour rendering possible is achieved by using lamps with Ra > 90. Ra is the arithmetic mean of the color deviation of the first 8 of 14 test colors according to DIN 6169, with the color rendering index Re, calculated across all 14 test colors and the additional test color 15 (Asia Skin Color), which also takes saturated colors, leaf greens and skin tones into account. DIN EN 12464 defines the colour rendering properties of lamps for lighting in different types of rooms and activities.

color coordinates

are a measure to precisely define a color or the color location belonging to the color in the CIE standard color system. The human eye has sensory cells for the perception of the three primary colours red, green and blue. The spectral eye sensitivity curves were determined by the CIE for the normal observer in 1931 and show the sensitivity for the individual wavelength ranges.


refers to changes in the brightness of the light due to voltage fluctuations. The noticability threshold for luminance changes is a frequency-dependent variable that indicates from which relative luminance change at a given frequency this is perceived. These fluctuations have an impact on human health. A good LED driver regulates voltage fluctuations and avoids flicker. The flicker value is a measure of the quality of the lamp or luminaire and should be as low as possible.

Illuminance strength

indicates the intensity with which a surface is illuminated. It is one lux if the luminous flux from one lumen illuminates the surface of one square metre evenly. One luxmeter is used to measure illuminance on horizontal and vertical surfaces. However, it does not reflect the impression of brightness of a room, as this depends largely on the reflective properties of the room surfaces. Under normal lighting conditions, no uniform light distribution is usually achieved, which is why specifications in standards usually refer to average illuminance. It is calculated as the weighted arithmetic mean of all illuminances in the room.

Colour temperature

is a measure to quantitatively determine the respective colour impression of a light source. The unit of colour temperature is Kelvin (K). In concrete terms, it is the temperature whose light effect is most similar to the colour to be described at the same brightness and under fixed observation conditions. h3>Color rendering IES TM-30-15 is a new IES standard for evaluating the colour rendering of light sources, which works with 99 reference colours distributed over the entire colour space. It therefore includes considerably more colours and shades in the calculation of the Fidelity index Rf, which describes the same relationship as the colour rendering index Ra. The Gamut-Index Rg provides information regarding color saturation and color shift similar to the Gamut-Area-Index GAI of the previous observation of color rendering.
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8 May 2020

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