DW-721N VIS Spectrophotometer

DW-721N VIS Spectrophotometer has the holographic blazed grating monochromator has the advantages of high wavelength accuracy, good monochromaticity and low stray light.

● Linear regression method and coefficient method are added to the concentration test method. 
● USB interface is added, and large capacity memory can store 30 concentration curves.
● Adopt microcomputer measurement system, with high conversion accuracy of T-A, automatic adjustment of 
● 0% T and 100% T, concentration factor setting and concentration direct reading.
● High accuracy, Good Reproducibility and Stability of Measurement Readings.
● Automatic light gate technology, No need blackbody, to protect the photoelectric sensor

DW-721N Brochure

Features of DW-721N VIS Spectrophotometer

  • Sample compartment for 5-50mm cuvettes
  • Precise automatic T/A changeover
  • Automatic zero and full scale adjustment 
  • Equipped with USB port
  • Direct concentration read-out and concentration factor setting function
  • Automatic light gate technology to protect photoelectric sensors

Specifications of DW-721N VIS Spectrophotometer

PhotometrySplit Beam
Monochromator TypeCzerny-Turner
Focal Length160mm
Grating1200 lines/mm
DetectorSilicon Photocell
Spectrum Bandwidth2nm
Wavelength SettingManual Turn Knob
Wavelength Range340-1100nm
Wavelength Accuracy±2nm
Wavelength Repeatability≤1nm
Stray Light≤0.1%T( at 360nm NaNo2 )
Photometric Range0.0-100.0% T
0.000-1.999 A
0.000-1999 C
Photometric Accuracy±0.5% T
±0.004 Abs (0-0.5A)
±0.008 Abs (0.5-1A)
Photometric Repeatability≤0.2% T
0.002 Abs (0-0.5A)
0.004 Abs (0.5-1A)
Noise100%（T）noise≤0.3%(T) ， 0%（T）noise≤0.2%(T)
PowerAC220V±22V 50Hz±1Hz, 80W
Packaging Size580mm X 460mm X 345mm 0.1M3 12.5kg

Standrad Accessories

Operation manual1pc
UV WIN8 Spectrum data processing software1pc
Glass cuvette 10mm4pcs
Power cable1pc
Fuse2pcs
Cuvette holder 10mm1pc

Optional Accessories

Cuvette holder50mm 100mm
Cuvette20mm 30mm 50mm 100mm