MK350S Premium All-Purpose

Visual Merchandising, Blue-Light, Flicker, PAR meter

MK350S Premium is a full-featured Handheld Spectrometer used by lighting professionals whose broad  customer base presents a wide range of projects and lighting challenges.

MK350S Premium product image

MK350S Premium Spectrometer

Photo by Arturo Castaneyra at Unsplash 

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MK350S Premium

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The MK350S Premium is a full-featured Handheld Spectrometer used  by top-tier Lighting Professionals, whose customer base and project scopes are wide ranging, with varying requirements in light measurement and problem solving.

That being said, the MK350S Premium is designed to tackle almost any lighting situation that comes your way, including:

  • LED Manufacturing
  • Public Lighting Safety
  • Lighting Design
  • Academics & Research
  • Grow Lights and Indoor Agriculture

Learn about MK350S Premium in 3 min 51 sec

Specs at-a-glance

SensorCMOS Linear Image Sensor
Wavelength Range380 to780 nm
Wavelength Data Increment1 nm
Spectral BandwidthApproximately 9 nm (Half Bandwidth)
Measurement Range1 to 150,000 lx
Measuring Capabilities1. 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
(3) CIE 1931 XYZ Value
4. △x,△y,△u',△v'
5. Duv, Excitation Purity, S/P ratio
6. Dominant wavelength
7. CRI, Ra, R1~R15, CQS, GAI, TLCI, TM30-18
8. Flicker Frequency, Percent Flicker, Flicker Index, Flicker Risk IEEE PAR 1789
9. Transmittance
10. Blue Light Hazard (EB/KBv/RG)
11. Melanopic Lux
Dark CalibrationAuto
Display4.3" 800 x 480 Resistive Touch LCD
Battery OperationUp to 4 hours after Fully Charged
Dimensions163 x 81 x 26.6 mm (H x W x D)
Weight (with Batteries)260g ± 10g
Camera Resolution2M pixels
LanguagesEnglish / Traditional Chinese / Simplified Chinese / Japanese / Spanish / German / French / Italian / Russian
Data FormatExcel Data and Jpg Images (screen capture)

LED Manufacturing – Beats Integrating Sphere

Nothing beats an integrating sphere for high precision light measurement, but it’s usually confined to laboratories and research departments.  In a manufacturing environment, sometimes the situation calls for versatility and flexibility in light measurement, as in batch testing, ad-hoc testing, spot-checking, or customer demonstrations.

The MK350S Premium is a portable lab-level measuring instrument designed for just that.  In addition to a full set of measurement metrics, it contains manufacturing features to boost productivity in QC activities.

  • Compare Mode – side by side product compare
  • Log Mode – Interval testing and data collection
  • Checker Mode – Quality Assurance
  • LED Bin rating (ANSI78.377)

▸Read about LED Manufacturing

Graphical and Numerical Comparative Analysis

Bin rating and Pass/NotPass QA checker

Public Lighting Safety – Crush the bad lighting

TLA or Temporal Light Artifacts can be problematic for light safety in public areas.  The MK350S Premium measures for problematic areas of lighting.

Flicker – Measures Flicker and provides severity assessment. (based on IEEE PAR 1789-2015 safety regulations)

▸Read about Flicker

Stroboscopic Effect – SVM metric measures one of the most dangerous lighting artifacts especially in factories with high speed equipment.

Read about SVM

Blue Light Hazard – BLH is an insidious hazard implicated in cataracts and macular degeneration.  MK350S Premium provides measurement and assessment. (IEC 62778 and utilized IEC 62471 standards)

▸Read about BLH

Human Centric Lighting – HCL measures how lighting can impact our physiology and chemistry.  Poor HCL ratings are implicated in diminished attention, depression and sleep disorders. (WELL Building Standard-V1 and CIE TN 003-2015 Report)

Read about HCL

Lighting Design – Create ambiance consistently.

If you are a lighting designer or a light setup coordinator, you probably understand the very subjective nature of light and color.  It’s very stressful work, especially with large projects and short deadlines.

With a spectrometer, you are validating your design by the numbers, and saving the data for subsequent projects.  MK350S  Premium provides Spectrums, LUX visuals and many Color Rendering Indices, to help designers quickly and confidently evaluate their lighting conditions.

▸Read about Light Design

Academics and Research – Perfect Teaching Tool, Data Collection, Data Analytics

The MK350S Premium is widely employed by major Universities and Research organizations.  It’s easy to transport from office, to lab and classroom.  It connects to large screens through PCs, collects large swaths of data, and easily transports and exports data to other systems for data analysis.

Grow Lights and Indoor Agriculture

Indoor agriculture is a  fast growing industry with potential hi-impact on global food supplies.  MK350S Premium can measure PFD and PPFD for grow lights.

▸Read about Grow Lights

Spectrum Measurement – Hitting the target

Precision is paramount when presenting credible numbers .  UPRtek spectrometers uses Diffraction Grating with a CMOS Linear Image Sensor to gain very tight bandwidth differentiation.

The MK350S Premium provides over 40 light measurement metrics (CCT, LUX, CRI, CIE (1976/1931), PPFD, CQS, Duv, LambadaP, S/P ratio.

Connect-up for Big View & Data Analytics

One of our most popular features is our uSpectrum PC software.  It allows the MK350S Premium to connect to PC devices through USB cable for full screen viewing, data collection and data export to popular software.

▸Read about our uSpectrum products

Full Featured means Full Confidence.

Don’t get caught without the right tools for the job.  If you are a lighting specialist, the MK350S Premium is the most comprehensive product in our lineup.  And that means confidence in your capabilities and confidence from your customers!

Handbook Series

The Grow Light Handbook

Everything thing you need to know to get started on Indoor Farming, PAR meters, and Grow Lights  – history, industry, vertical farming, PPFD, types of lights, photosynthesis 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.

▸ Read on


Grow light chamber

What is a "Spectral" PAR Meter

Valentine’s Day is approaching, and you're an anxious indoor rose farmer trying to encourage your buds to bloom in time.

The good news is that researchers have begun to understand the triggering mechanisms for seed germination, flowering, and fruiting, involving grow-light strategies

Now indoor farmers are using this information with “Spectral” PAR meters, measuring grow lights for a light metric PSS (Phytochrome Photostationary State) to trigger photomorphogenesis (i.e., plant transformations caused by light).

  ▸ Read on