MK350D Compact Spectrometer

Pocket-sized spectrometer that gets the job done.

MK350D is our most basic spectrometer, pocket-sized but uncompromising in light measurement accuracy.   Spectrum, CCT, CIE, CRI, LUX, Blue Light Hazard, Flicker Percent, Mobile/PC connectivity.

MK350D Compact Spectrometer (rear front views)

Photo by Marcus Wallis at Unsplash

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MK350D Compact Spectrometer

(click image to download 360 view)


MK350D Compact is for users who just need a simple product with basic measurements essentials.  And yet the measurement accuracy needs to be accurate and up to the scrutiny of global standards.   

It’s the smallest standalone professional spectral meter product on the market.  It’s easy to carry, but back at the office you can connect up to PCs for large screen full color views and data export.

  • 90 x 30 x 32.2 mm (HxWxD), Weight 70g
  • Flicker and Blue Light Hazard
  • MicroSD Card for data export
  • Mobile & PC Connectivity (Bluetooth)

Learn about Mk350S Premium in 3:51

Specs at-a-glance

SensorCMOS Linear Image Sensor
Wavelength Range380 to 780 nm
Wavelength Data Increment1 nm
Spectral BandwidthApproximately 12 nm (Half Bandwidth)
Measurement Range70 to 70,000 lx
Measuring Capabilities

  1. Illuminance (LUX)/Foot Candle (fc)

  2. Correlated Color Temperature (CCT)

  3. CIE Chromaticity Coordinates
    (1) CIE 1931 x,y Coordinates
    (2) CIE 1976 u',v' Coordinates

  4. Color Rendering Index (CRI, Ra) / R9

  5. Percent Flicker

  6. Spectral Power Distribution (SPD) mW/m2

  7. Peak Wavelength (λp)

  8. Blue Light Weighted Irradiance (Eb) w/m2

  9. Blue Light Hazard Efficacy of Luminous Radiation (Kbv) w/lm

  10. Blue Light Hazard Blue-ray % (BL%)

  11. Blue Light Hazard Risk Group(RG)

Display0.96" 128X64 mono OLED
Battery Operation Time≦ 3 hours / Fully Charged
Dimensions90 x 30 x 32.2 mm(H x W x D)
Weight (with Batteries)70 g ± 5 g
Data FormatCompatible Excel
Display languagesEnglish

 Never Compromise on Accuracy and Precision

UPRtek specializes in redesigning lighting instrumentation into handheld form factors, but our mandate is to never compromise on accuracy and performance.

The MK350D Compact uses diffraction grating and CMOS Linear Image Sensor with 380-780 nm wavelength range at 1nm increments.

Precision and Accuracy

Just the basics, please!

MK350D gives you just what you need, basic numbers to make quick and decisive evaluation and assessment of lighting products and lighting environments.

Essential Light Measurement Data

Light Safety Essentials

Flicker Checker and Blue Light Hazard are essential features because of increasing scrutiny by standards organizations to track down safety hazards posed by artificial lighting. 

▸Read on about Flicker

▸Read on about Blue Light Hazard

Flicker and Blue Light metrics

MK350D – Connect up to larger digital world.

MK350D can be used with our uSpectrum software to connect up to PC/laptops.  You can see all of your data and graphics on the big screens in full color.  The micro SD card can transport data including graphics as jpg files and data in excel compatible format.

▸Read about HCL

 MK350D Compact – Just what you need.

MK350D Compact is basic and pocket-sized but doesn’t compromise on the most important aspects of a professional spectral meter – accuracy and precision.

Handbook Series

The Flicker Handbook

A comprehensive look at Flicker, why we have it, what problems it presents, how you can measure it and what you can do to avoid it.

▸ Get it!

About UPRtek

United Power Research and Technology

UPRtek (est. 2010) is a manufacturer of portable, high-precision light measurement instruments; Handheld Spectrometers, PAR meters and Spectroradiometers.

UPRtek HQ, R&D and manufacturing are all based out of Taiwan, with Worldwide representation through our certified Global Resellers.

▸ Read on



UPRtek's partner in China, Quelighting Optoelectronics Co., Ltd, and Plant Growth Chamber Manufacturer Ningbo Jiangnan Instrument Factory will attend the 30th International Conference on Arabidopsis Research (ICAR ) which is being held on June 16-21 at Huazhong Agricultural University in Wuhan City, Hubei Province, China.

▸ Read on.