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AI-MK350S Advanced Handheld Spectrometer

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  • A portable all in one LED Advanced handheld spectrometer (MK350S)

  • Show Spectrum diagram on site, WIFI connection with IPhone/android device

  • Can test CCT, CRI, LUX, CIE1931, CIE1976, BIN, LUX Imagine,

  • SD and USB Data and wifi output with Excel and image format

  • No computer needed

The UPRTEK AI-MK350S Spectrometer is an advanced version of MK350 (N), first lightweight, handheld, portable LED light spectrometer with a color screen which does not require a computer. 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 needed.

In addition of MK350 model features, MK350S has more features below:

Enhanced screen resolution

• More than 30 light unit-of-measures to choose from

• Standalone LED meter - no other equipment necessary (e.g. PC, Smartphone etc.)

• Illumination distribution charts provide assistance in fixture design

• "BIN" ranking features allow for fast CIE 1931 inspection and confirmation of LED quality • Visual aim 'n click scope (on-screen viewport) - no more blind measurements

• Automatic continuous measurements with data-save to a SD card

• Easy, on-the-spot data comparison features - comparing 2 LEDs, or comparing against historical data • Maximum and minimum acceptable ranges for validating LED quality • "Built-in file browser allows users to instantly read data in saved files.


Please check here for more details.




Specification of MK350S


CMOS Linear Image Sensor

Spectral Bandwidth

Approximately 12 nmhalf bandwidth

Receptor Size

Ø 6.6 ± 0.1 mm

Measurement  Range

20 ~ 70000 LUX ( FAQ Q9)

Wavelength  Range

380 ~ 780 nm

Integration Time  Range

6 ~ 5000 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

5. Color Rendering Index Mode

6. Lux Image Distribution Mode
7. Measuremenr Log Mode
8. CCT BIN Chart Mode
9. Quality Control Checker Mode
10. Measurement Comparison Mode
11. Data Browser Mode

Measuring  Capabilities

1. Illuminance  / LUX/Foot Candle

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/Dominant Wavelength

5. Correlated Color Temperature; CCT ( in Kelvins )

6. Color Rendering Index; Ra /R1-R15

7. △x,△y,△u',△v'

 8. duv, Purity
9. PPF(400nm~700nm)
10. BIN

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%


4.3" LCD 800X480 Touch Panel

Max. Files

 2000 Files @ 2GB SD Card

Battery Operation Time

 4 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


163 x 81 x 25.8 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  MK350S cosine-en


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