MK350S Premium Spectrometer


The MK350S Premium is a stand-alone, handheld multi-function spectrometer. In addition to a full range of spectrometer functions, it can also be used as a Quantum PAR Meter or an oscilloscope.  Users can choose from more than 40 light measurement units.  Data can be downloaded via USB or Wi-Fi connection for storage and analysis, and uSpectrumTM / uFlickerTM software downloads are included, free of charge.

Additional features versus the MK350S Premium include

  • PAR measurement
  • BIN mode
  • QC check
  • Data Comparison
  • Blue Light Hazard
  • LUX Image Distribution


Precision, Power and Portability in a Compact & Lightweight Package


  • Completely Stand-Alone Operation - no other equipment necessary (e.g., PC, Smartphone, etc.) 
  • More than 40 units of measurement
  • Conforms to JIS AA Class & DIN Class B Requirements
  • Built-in file browser allows for quick access to previously saved data
  • Wi-Fi remote control option with IOS or Android applications
  • Automatic continuous measurements with data-save to an SD card
  • NIST Traceable calibration

With an intuitive, user-friendly interface, the MK350S Premium offers a dynamic range from 1 to 150,000 lux. Automatic dark calibration is embedded to reduce noise interference over a range of operating temperatures and lighting environments. 

Product Features

Capture Function

One-time or continuous

Operation Mode

Stand-alone, WiFi or USB (to PC, mobile device or tablet)

Integration Mode

Auto or Manual

Automatic Dark Calibration

Auto mode

Measuring Modes

Basic                                    Spectrum                         CRI                                              CIE 1931 Chromaticity

CIE 1976 Chromaticity         BIN Chart                         TM30-15                                      Lux Image Distribution

Log                                       QC Checker                     Measurement Compare               Transmit

Flicker                                  Frequency                        Flicker Risk                                  Blue Light Hazard

Browser                               Option

Measuring Capabilities

Light & Color Parameter

Illuminance (lux) or Foot-candle (FC)

Correlated Color Temperature (K)

CIE Chromaticity Coordinates

CIE 1931 x,y           CIE 1976 u’, v’      CIE 1931 XYZ

ΔX, ΔY, ΔU’, ΔV’

Delta UV; DUV

Dominant wavelength; Hue, ƛd (nm)

Chroma Purity (%)

Scotopic and Photopic ratio: S/P

Light & Color Evaluation

BIN ANSI C78.377 or customized

Standard Deviation Color Matching (SDCM)

Color Rendering Index (CRI, Ra) R1 to R15

Color Quality Scale (CQS)

Gamut Area Index (GAI)

TM-30—15 (Rf, Rg, Color Vector Graphic)

Television Lighting Consistency Index (TLCI)


Flicker Frequency (Hz)

Flicker Percentage (%)

Flicker Index

Stroboscopic Effect Visibility Measure (SVM)

Flicker Risk – IEEE PAR 1789

Photosynthetically Active Radiation (PAR)

PPFD 400-700 nm µmol/m2/sec

PPFD UV 380-400 nm µmol/m2/sec

PFD-B 400-500 nm µmol/m2/sec

PFD-G 500-600 nm µmol/m2/sec

PFD-R 600-700 nm µmol/m2/sec

PFD-FR 700-780 nm µmol/m2/sec

Spectral Radiation

Spectral Power Distribution (SPD) mW/m2

Peak Wavelength (ƛp) nm

Peak Wavelength Value (ƛpV) mW/m2

Transmittance %

Blue Light Hazard

Blue Light Weighted Irradiance (EB) W/m2

Blue Light Hazard Efficacy of Luminous Radiation (K B,V) W/lm

Blue Light Hazard Risk Group (RG)




CMOS linear image sensor

Illuminance Meter Class

Directional response conforms to JIS C 1609-1:2006 for General Class AA

Directional response conforms to DIN 5032 Part 7 Class B

Wavelength Range

380 to 780 nm

Wavelength Data Increment

1 nm

Spectral Bandwidth

12 nm                                     (half power bandwidth)

Wavelength Reproducibility

± 1 nm                                    (assumes stable input light source)

Measurement Range

1 to 150,000 lux

Illuminance (1)




±  2.5%

    Repeatability (2σ)

±  0.2% from 100 to 150,000 lux

±  0.5% from 5 to 100 lux

±  1 from 1 to 5 lux

Color (1,2)




x y: ±  0.002 from 100 to 150,000 lux

x y: ±  0.0025 from 5 to 100 lux

x y: ±  0.003 from 1 to 5 lux

    Repeatability (2σ)

x y: ±  0.0002 from 500 to 150,000 lux

x y: ±  0.0004 from 30 to 500 lux

x y: ±  0.001 from 5 to 30 lux

x y: ±  0.002 from 1 to 5 lux

CCT Accuracy

± 2%

CRI Accuracy at Ra

± 1.5%

Stray Light

-25 dB maximum                     (550 ± 40nm monochromatic source)

Integration Time Range

60 µsec to 5 sec                    

Digital Resolution

16 bit



Measurement Range

1 to 150,000 lux

Sampling Rate

100 kHz

Frequency Range

5 to 50 kHz

Frequency Resolution

2, 4, 8, 16, 32 Hz

Flicker Accuracy

± 5%


System Configuration


800 x 480 mm (4.3 in) resistive touch LCD

Maximum Files

21,000 with 8 GB SD card, compatible with Excel® and JPG

Battery Operation

Up to 4 hours, onboard 3.7 V Li-ion

External Power

Adapter (included), 2500mAh via USB connector

Data Interface

SD card  (SD2.0.SDHC up to 32 GB) or  mini USB port (USB 2.0) or WiFi SD card (IOS or Android)


163 mm (6.4 in) H x 81 mm (3.2 in) W x 26.6 mm (1.1 in) D                       260 g (0.6 lbs) including battery

Language Options

English, Traditional Chinese, Simplified Chinese, Japanese, Spanish, German, French, Italian, Russian

Camera Resolution

2M pixels

(1) At 23 ± 2° C and relative humidity ≤ 50%                                                                                    Specifications are subject to change without notice.

(2) Illuminant A at 2,856 K

(3) 30 Hz AC/DC 10% sine wave unless otherwise specified