MK350S Premium Advanced Spectro-Flicker meter

The MK350S premium is a lightweight, portable, easy to operate Spectral Illuminance (LUX) Meter, Spectral Light and Flicker Meter.  It is designed for spectral illuminance measurements of general lighting, horticulture/agriculture lighting, and LEDs.  Designed to be intuitive and user friendly, it is versatile and ideal for measuring general light metrics such as LUX, CCT, CRI, CIE 1931, Ra, R1 to R15, Wavelength, PPFD & PAR and many others.  Uniquely, the MK350S premium also includes an integrated CCD camera to give an additional visual view to display the feeling of lighting level and uniformity for the area under measurement.


* Touchscreen control with a 3.5″ resistive touch LCD screen.
* More than 40 units of measurement including LUX, SPD, CRI, CCT, Ra, R1 to R15, CIE 1931, u’ v’, Peak and Dominant Wavelength, and many others.
* Stand alone Spectral Light meter – no other equipment necessary (e.g., PC, Smartphone, etc.). Built-in file browser allows for quick access to previously saved data
* 380 to 780nm measurement range
* NIST Traceable calibration.
* Wifi remote control via Smartphone or tablet apps (IOS and Android)
* Visual aim & click display (on-screen viewport) – No more blind measurements
* Automatic continuous measurements with data-save to an SD card
* Illumination distribution charts provide assistance in fixture design
* Easy, on-the-spot data comparison features – Comparing different lamps/LEDs or comparing against historical data
* Maximum and minimum acceptable ranges for evaluating LED quality
* 3-year product warranty
* Package Contents: MK350S Premium LED Meter, hard case, protection bag, battery, USB cable, power adapter, neck strap, tripod/stand bracket, User Manual & Warranty booklet




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MK350S Premium Spectrometer
Sensor 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 Approximately 9 nm (Half Bandwidth)
Wavelength Reproducibility ± 1 nm *1
Measurement Range 1 to 150,000  lx
Illuminance Accuracy Illuminant A @ 2,856 K*2*7 ± 2.5%
Illuminance Repeatability (2σ) 0.2%  in CIE 1931 x,y (100 to 150,000 lx)
0.5%  in CIE 1931 x,y (5 to 100 lx)
1% in CIE 1931 x,y (1 to 5 lx)
Color Accuracy ± 0.002 in CIE 1931 x,y(100 to 150,000 lx)
± 0.0025 in CIE 1931 x,y (5 to 100 lx)
±0.003 in CIE 1931 x,y (1 to 5 lx)
Color Repeatability  (2σ) 0.0002  in CIE 1931 x,y (500 to 150,000 lx)
0.0004  in CIE 1931 x,y (30 to 500 lx)
0.001  in CIE 1931 x,y (5 to 30 lx)
0.002  in CIE 1931 x,y (1 to 5 lx)
CCT Accuracy ± 2%
CRI Accuracy @ Ra ± 1.5%
Stray Light -25 dB max. *3
Integration Time Range 60us to 5,000 ms
Digital Resolution 16 bits
Measurement Range 1 to 150,000  lx
Sampling Rate 100k sample/sec
Frequency Range 5 to 50k Hz
Frequency Resolution 2, 4, 8, 16, 32 Hz
Accuracy 5% (5 to 30K Hz)*6
Capture Function One Shot/Continuous
Operation Mode Standalone Mode/WiFi Mode*4/USB Mode (MSC Mode*5 + PC connection)
Integration Mode Auto/Manual
Dark Calibration Auto
Measurement Mode 1. Basic Mode
2. Spectrum Mode
3. CRI Mode
4. CIE 1931 / 1976 Chromaticity Mode
5. LUX Image Distribution Mode
6. Logging Mode
7. BIN Chart Mode
8. Quality Control Checker Mode
9. Measurement Comparison Mode
10. Transmit Mode
11. TM-30-18 Mode
12. Flicker Mode
13. Frequency Mode
14. Flicker Risk Mode
15. Blue Light Hazard Mode
16. HCL Mode
17. Browser Mode
18. Option Mode
Measurement Capabilities 1.Illuminance (LUX)/Foot Candle (fc)
2.Correlated Color Temperature ; CCT (K)
3.CIE Chromaticity Coordinates
 (1) CIE 1931 x,y Coordinates
 (2) CIE 1976 u’,v’ Coordinates
 (3) CIE 1931 XYZ Value
4.△x , △y , △u’ , △v’
5.Delta uv ; Duv
6.Dominant Wavelength ; Hue ; λd (nm)
7.Excitation Purity (%)
8.Scotopic and Photopic Ratio (S/P)
9.BIN ANSI C78.377 or Customized
10.Standard Deviation Color Matching (SDCM)
11.Color Rendering Index (CRI, Ra)/R1 to R15
12.Color Quality Scale (CQS)
13.Gamut Area Index (GAI)
14.TM-30-15 (Rf, Rg, Color Vector Graphic)
15.Television Lighting Consistency Index (TLCI)
16.Flicker Frequency (Hz)
17.Percent Flicker (%)
18.Flicker Index
19.Stroboscopic Effect Visibility Measure (SVM)
20.Flicker Risk – IEEE PAR1789
21.PPFD (400 to 700nm) µmol/(m2*s)
(1) PFD-UV (380 to 400nm) µmol/(m2*s)
(2) PFD-B (400 to 500nm) µmol/(m2*s)
(3) PFD-G (500 to 600nm) µmol/(m2*s)
(4) PFD-R (600 to 700nm) µmol/(m2*s)
(5) PFD-FR (700 to 780nm) µmol/(m2*s)
23.Spectral Power Distribution(SPD), Unit: (mW/m2)
24.Peak Wavelength ; λp (nm)
25.Peak Wavelength Value ; λpV (mw/m2)
26.Transmittance (%)
27.Blue Light Weighted Irradiance ; EB (w/m2)
28.Blue Light Hazard Efficacy of Luminous Radiation ; KB,V (w/lm) 
29.Blue Light Hazard Risk Group(RG)
30.Blue Light Hazard Blue-ray %
31. Melanopic Lux
(1) Mel Irradiance
(2) Mel Daylight Lux
(3) Melanopic Ratio
(4) Rhodopic Lux
(5) Chloropic Lux
(6) Erythropic Lux
(7) Cyanopic Lux
System Configurations
Display 4.3″ 800X480 Resistive Touch LCD
Max. Files ≒ 21,000 Files @ 8GB SD Card (Excel + JPG)
Battery Operation Time ≦ 4 hours / Fully Charged
Power Adapter; 2500 mAh (3.7V Rechargeable Li-ion Battery)
Data Output Interface SD Card (SD2.0,SDHC/up to 32G)/Mini USB Port (USB 2.0)/WiFi SD Card compatible with iOS and Android
Data Format Compatible Excel/JPG
Dimensions 163 x 81 x 26.6 mm (H x W x D)
Weight (with Battery) 260 g ± 10 g
Operating Temperature/Humidity 0 to 35 ℃, relative humidity 70% or less without condensation
Storage Temperature/Humidity -10 to 40 ℃, relative humidity 70% or less without condensation
Display languages
English/Traditional Chinese/Simplified Chinese/Japanese/Spanish/German/French/Italian/Russian
Camera Resolution 2M pixels
Cosine Correction
*1:Input source must be a stable light source.
*2 :Temperature 23±2℃ and relative humidity 50% or less.
*3:Input the 550nm monochromatic light and measure the stray light ratio at 550nm ± 40nm.
*4:It can be connected to mobile phones and tablets.
*5:MSC Mode- Mass Storage Class.
*6:Test condition is based on Lux > 300 lux of sine wave light source.
*7:Repeatability test is based on the status of shutter opening.
The company reserves the right to change product specifications at any time without prior notice.