Portable Light Spectrometer (spectrophotometer)


We are happy to launch a revolutionary new products - Portable all-in-one spectrometers (spectrophotometer) for testing lighting quality of the ambient environment and all lighting products, especially LED light sources.

UPRTEK AI-MK350 Spectrometer (spectrophotometer) family are the first lightweight, handheld, portable LED light spectrometer with a color screen which does not require a computer.  They include MK350(first generation product, replaced by MK350N Plus), MK350N Plus, advanced version MK350S, portable version MK350D and economic MF250 flicker meter,  Click here for comparison. This portable spectrometer can be used for LED / OLED lighting research and development, quality control of all lighting products, as well as conventional architectural and stage/studio lighting studies.

With one click, in addition to viewing the full-color spectrum in color, you can also get the following lighting data: CCT, CRI, LUX, Lambda Peak, CIE1931, CIE 1976.  All of this in the palm of your hand, no computer need.   

MK350N PLUS head

 MK350N Plus,   2015 Spectrometer

   MK350S, Advanced  (more info)  


      MF250, Affordable flicker meter, latest!

 MK350D, portable and compact

Update MK350  to Wifi+Analyze  

Software (more info)          





 MK350D spectrometer2 wifi SDMK350-pc-software200
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Direct Buy


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Direct Buy


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Direct Buy


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Direct Buy


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* AI-MK350 (N) first generation spectrometer will be replaced by AI-MK350N Plus in 2015

Note: Government, university and research institute have additional discount, Also, we have price match policy, contact us for more details.



You can analyze spectrum of LED lights on site with no additional equipment, this is the fastest and most economic lighting analyzing tool so far, this device is good for LED/OLED research and development, lighting designer, interior designer, plant research /LED grow lights application, outdoor ads display screen, auto lights, food store illuminating, art and museum lights et al.  


 Accuracy and Reliability

Accuracy and reliability of spectrometer is main consideration except portable benefit, we tested a few single wavelength LEDs and multiple wavelengths fixtures from different manufacturers, below are results. In summary, AI-MK350 spectrum data is very close to data tested by standard spectrometer or data provided by manufacturers, therefore, this handheld spectrometer will be used to wide field with its portability, accuracy, simplicity  and affordable price.

Note:Test condition is not controlled by professional darkroom, the result may be interfered by other lighting source, e.g office lights, sunshine et al.  


   Spectrum of Philips L-prize 9.7W bulb, right bulb is blue LED by removing cover of "remote phosphor" 


 Spectrum of Seoul Semiconductor 660nm Red and 450nm Blue LED 


Spectrum of OSRAM OSLON SSL Hyper Red LED (Left diagram is from osram web)

slt-58a compare

Data of standard spectrometer(left) and AI-MK350 handheld spectrometer of Sltec recessed LED light (model SLT-58A)


Data of standard spectrometer(left) and AI-MK350 handheld spectrometer of EPA grow light designed by AIBC(model AI-180-200, 660nm:620nm:450nm:6000K=6:1:1:1)



Specification of MK350 (N)


CMOS Linear Image Sensor

Spectral Bandwidth

Approximately 12 nmhalf bandwidth

Receptor Size

Ø 6.6 ± 0.1 mm

Measurement  Range

70 ~ 70000 LUX ( FAQ Q9)

Wavelength  Range

360 ~ 750 nm

Integration Time  Range

8 ~ 1000 ms

Capture Function

One time / Continuous

Integration Mode

Auto / Manual

Measuring Modes

1. Basic Value Mode

2. Spectrum Graph Mode

3. CIE 1931 Chromaticity  Diagram  Mode

4. CIE 1976 U.C.S Chromaticity  Diagram  Mode

Measuring  Capabilities

1. Illuminance  / LUX

2. Spectral Irradiance

3. C.I.E. Chromaticity Coordinates

    (1) CIE 1931 x,y Coordinates

    (2) CIE 1976 U.C.S u',v' Coordinates

4. Peak Wavelength

5. Correlated Color Temperature; CCT ( in Kelvins )

6. Color Rendering Index; Ra ( Rendering Average )

Digital Resolution

16 bits

Dark Calibration


Stray Light

-25 dB max.
( Use the input of 550nm single-frequency and measurement the range of optical ± 40nm. )

Wavelength Data Increment

1 nm

Wavelength Reproducibility

± 1 nm
( Input source must be a stable light source. )

Illuminance Accuracy

Illuminant A @ 2856K at 20000 LUX

± 5%

Color Accuracy

± 0.0025 in CIE 1931 x,y

Color Repeatability

± 0.0005 in CIE 1931 x,y

CCT Accuracy

± 2%

CRI Accuracy @ Ra

± 1.5%


3.5" LCD 320X240 Touch Panel

Max. Files

2000 Files @ 2GB SD Card

Battery Operation Time

5 hours / Fully Charged


2500 mAh / Rechargeable Li-ion Battery

Data Output Interface

SD Card SD2.0, SDHC / up to 32G/ USB 2.0

Data Format

Compatible with Microsoft  Office Excel / BMP Date Format


144.2 x 78 x 24 mm ( H x W x D ),  310x250x110 mm (package/unit)

Weight ( with Battery )

250 g ± 20 g

Operating Temperature Range

0 ~ 35 °C

Storage Temperature Range

-10 ~ 40 °C

Language Version

English / Traditional Chinese / Simplified Chinese / Japanese

Cosine Correction  correction


Comparison of similar portable spectrometers

Spectrometer portable spectrometer-100 minolta-cl-200a-100x yokogawa 52006 spectrometer 
Model AI-MK350 (N)  Konica Minolta Cl-200A   Yokogawa  52005
CIE 1931, CIE 1976  Yes  Yes  Yes
Correlated Color Temperature(CCT)  Yes  Yes  Yes
LUX  70-70,000lx(Check FAQ Q9)  0.1-99,990lx  0.1-99,990lx
Display of Spectrum  Color Diagram  No  No
Data Output USB/SD card USB only  USB only
Color Rendering Index(CRI)  Yes  No  No
Screen Display  3.5"  LCD Color Touch Panel   Black 4 Line LCD  Black 4 line LCD
Data Analysis No Computer Needed Need Computer Need Computer
Dimension  78x144x24mm  69x174x35mm  67x218x68mm
Weight  250g with battery  265g


Retail Price $1695 $3500


Package includes items 



We ship spectrometer (spectrophotometer) from New York  State next business day after receiving order. Occasionally, there is extra days delay for refill inventory since high volume demand, we will notice shipping schedule.

We provide our customer the first year of free spectrometer correction service, after that call us for more details.

We have the latest advanced MK350S spectrometer,  visit web for the comparison of MK350 MK350N Plus, MK350S and MK350D and also, if you have basic MK350, you can update wifi and desk software by MK350 WIFI & software update Kit 

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