MK350D Compact Spectrometer

Pocket-sized spectrometer that gets the job done.

MK350D is a 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 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 ultra 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 MK350D Compact Spectrometer in 2 minutes

Specs at-a-glance

Specs at-a-glance
SensorCMOS Linear Image Sensor
Wavelength Range380 to780 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≦ 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

 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.

UPRtek spectrometers uses Diffraction Grating with a CMOS Linear Image Sensor to gain very tight bandwidth differentiation.

Precision and Accuracy

Pocket-sized, ultra portable.

The MK350D Compact spectrometer is only 90mm tall and weighs only 70g (with batteries).  This means it’s ultra portable and pocket-sized. That makes a difference for users like lighting designers, who sometimes need to climb up to high places to measure lighting (e.g. stage lighting on scaffolding, or ceiling lights).

MK350D Compact Form Factor

Bluetooth wireless reach

The MK350D also has built in wireless Bluetooth facilities, allowing you to use your mobile device to control the MK350D from afar.  “Built-in” BT wireless means that connectivity to other devices is more reliable.

With BT, not only can you have full color display and a larger screen, there is a lot of room for creative QC/QA activities.


Manufacturing – SDK, Modbus Interfaces

It’s a basic product but precision is not compromised.  That’s why LED manufacturing companies are employing the MK350D on their production line to integrate with their own RD software/hardware.  Mk350D uses an SDK (Systems Developer’s Kit) and the increasingly popular Modbus interface.

Read on about Manufacturing and Spectrometers

MK350 Bluetooth Wireless
Wing Wifi Card QC versatility

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

MK350D Flicker HEV screens

Flicker and Blue Light metrics

MK350D – Connect up to larger digital world.

MK350D can be used with our uSpectrum PC software to connect (USB cable) 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 uSpectrum PC Software

 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

Everything thing you need to know about Flicker, an insidious, potentially serious lighting artifact impacting visual safety for public places like hospitals, offices, libraries, and more...

▸ 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, Spectroradiometers, Light Calibration Solutions.

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

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Medical Setting using LED or Fluorescent Lights

GPEC Greenhouse Horticulture & Plant Factory Exhibition/ Conference

GPEC is a leading international exhibition focused on the latest advancements and technologies in greenhouse horticulture and plant factories. We are excited to announce that our business partner, ARIANETECH PTE LTD, will be participating in the GPEC 2024 in Japan. They will have a booth at the exhibition where they will showcase our Handheld Spectral PAR Meter, PG200N. We encourage all international visitors attending this exhibition to visit Booth H-07 and explore our innovative PG200N.