United Power Research Technology Corp.


Handheld Spectrometer

MK350D Bluetooth ios/android Smart Control Handheld Spectrometer Uprtek 

Compact MK350D 70g pocket size
The lightest handheld spectrometer in the world.

Flicker measurement for disease prevention and health check

Standalone operation
no need smart phone or PC connection

Aim and shoot
Supports Micro SD card
unlimited data storage for measurement

CCT, LUX, CRI, CIE1976 u’, v’, CIE1931 x, y
Spectrum diagram、Percent Flicker and 27 light unit-of-measures

Compatible with smart devices
Wireless control by Bluetooth

Additional uSPECTRUM App and Software for advance analysis
Additional 5 customized lighting application modes
To make you lighting measuring job easier


 Sensor CMOS Linear Image Sensor
Wavelength Range 380 to 780 nm
Wavelength Data Increment 1 nm 
Spectral Bandwidth Approximately 12 nm (Half Bandwidth)
Wavelength Reproducibility ± 1 nm (Input source must be a stable light source.)
Measurement Range 70 to 70,000  lx
Illuminance Accuracy Illuminant A @ 2,856 K at 20,000 lx (Temperature 23±2℃ and relative humidity 50% or less.) ± 5%
Color Accuracy ± 0.0025 in CIE 1931 x,y
Color Repeatability ± 0.0005 in CIE 1931 x,y
CCT Accuracy ± 2%
CRI Accuracy @ Ra ± 1.5%
Stray Light -25 dB max. (Input the 550nm monochromatic light and measure the stray light ratio at 550nm ± 40nm.)
Integration Time Range 6 to 1,000 ms
Digital Resolution 16 bits 
Frequency Range 10 to 165 Hz
Capture Function One time
Operation Mode Standalone Mode / Bluetooth Mode (It can be connected to mobile phones and tablets.) /
USB Mode (PC connection)
Integration Mode  Auto
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)
System Configurations
Display 0.96" 128X64 mono OLED
Max. Files ≒ 1.2 million Files @ 8GB Micro SD Card (Excel)
Battery Operation Time ≦ 3 hours (Fully Charged)
Power USB Power; 700 mAh (3.7V Rechargeable Li-ion Battery)
Data Output Interface Micro SD Card (SD 2.0, SDHC/up to 32G) /
Mini USB Port (USB 2.0) /
Bluetooth 3.0 and 4.0 compatible with iOS and Android
Data Format Compatible Excel
Dimensions 90 x 30 x 32.2 mm (H x W x D)
Weight (with Battery) 70 g ± 5 g
Operating Temperature /
0 to 35 ℃,
relative humidity 70% or less without condensation
Storage Temperature /
-10 to 40 ℃,
relative humidity 70% or less without condensation
Display languages English
Cosine Correction  

The company reserves the right to change product specifications at any time without prior notice.


2014 Top 100 Awards
2015 Taiwan Excellence

Optional Accessory

Applicable Industry

LED Screens
LED Professionals
Road and Traffic
Marine Biology