YANTAI STARK INSTRUMENT CO., LTD.

L7 dual beam UV-VIS spectrophotometers adopt double beam optical system, and blazed holographic gratings. 

They have outstanding test precision and very competitive prices. 8-inch color touch-screen, cutting-edge user interface, powerful functions, and easy operation. 
With powerful functions, the equipment shows great performance in qualitative and quantitative testing, such as: 
● Full-spectrum scanning 
● Linear regression 
● Detailed spectrum scanning
● Concentration direct reading 
● Time-based kinetics determination 
● Peak / Valley detecting 
● GOTO λ 
● Multi-wavelength measurement 

 

The equipment is designed with sophisticated power protection system. With high capacity of internal memory, it can store testing results, scanned images, regression equations and correction data. Therefore, it follows a fast initialization when power on. 
The instrument can be connected with dedicated printer, which can print testing results, or draw curve from spectral scanning, fixed wavelength time-based scanning, and linear regression. 
With USB COM port the device can be connected to a PC, which can not only enhance theperformance in data testing and spectrum scanning, but also expand the memory to save more testing results.

Main Features

● Double beam optical system 
● 8-inch color touch-screen 
● Automatic zero and full scale adjustment 
● Automatic wavelength settings 
● Equipped with USB COM port 
● UV WIN8 Spectrum Data Processing Software optional 
● Thermal plotter optional 

Specificatons

Photometry:     Double Beam

Monochromator Type:    Czerny-Turner

Focal Length:    160mm

Grating:    1200 lines/mm

Detector:     Silicon Photocell

Spectrum Bandwidth:    1.8nm

Wavelength Setting:     8-inch color touch-screen

Wavelength Range:    190-1100nm

Wavelength Accuracy:    ±0.3nm

Wavelength Repeatability:    ≤0.1nm

Scanning Speed:    Fast-Medium-Slow

Stray Light  :     ≤0.03%T( at 220nm NaI, 360nm NaNo2 )

Photometric Range:     0.0-200.0% T

-0.301-4.000 A

0.000-9999 C

Photometric Accuracy:    ±0.3% T

  ±0.002 Abs (0-0.5A)

  ±0.004 Abs (0.5-1A)

Photometric Repeatability:    ≤0.15% T

     0.001 Abs (0-0.5A)

        0.002 Abs (0.5-1A)

Baseline:     ≤±0.002 A(200-1090nm)

Noise:    100%（T）noise≤0.15%(T) ， 0%（T）noise≤0.1%(T)

Drifting:    ≤0.0009 Abs/h (250nm and 500nm after 2h warm up)

Power:    AC220V±22V 50Hz±1Hz, 200W

Packaging Size:    710mm X 590mm X 505mm 0.21M³ 36kg

Standrad Accessories

● Operation manual 1
● Glass cuvette 1cm 4pcs
● Quartz cuvette 1cm 2pcs
● Power cable 1
● Fuse 2pcs
● Cuvette holder 10mm

Optional Accessories

● UV WIN8 Spectrum data processing software
● Thermal Plotter

● no optional cuvette holder