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Walter Spectrophotometers

The spectrophotometers are designed for educational and general analysis at a reasonable price. These instruments have variable wavelengths for transmittance and absorbance. The solid-state, silicon detector covers the entire wavelength range, eliminating the need to change detectors. The technology of the Type IV concave grating and Toyoidal mirror are used in this optical system. It is ideal for various applications such as:

S21_spectrophotometer copy.jpg (33147 bytes)S-21
  • Biochemistry
  • Environmental Protection
  • Petrochemistry
  • Clinical Chemistry
  • Food and Beverage Labs
  • Water & Waste Water Labs
S-22 Standard Package Includes
  • S22 Spectrophotometer
  • Software Package
  • RS-232 Serial Cable
  • 4 Position Cuvette Holder
  • Power Cable
  • Spare Fuse (2A) and Lamp
  • Instruction Manual
S22 _spectrophotometer copy.jpg (105238 bytes)S-22 S51_spectrophotometer copy.jpg (28382 bytes)S-51 S-51 Standard Package Includes
  • S51 Spectrophotometer
  • Software Package
  • RS-232 Serial Cable
  • 4 Position Cuvette Holder (2
  • Quartz Cuvettes included)
  • Power Cable
  • Spare Fuse (2A) and Lamp
  • Instruction Manual

Specs

S-21

S-22

S-51

Wavelength Range (nm)   

340-1000

340-1000

200-9002

Wavelength Accuracy (nm)  

Better than ± 2.5nm

± 2

±2

Wavelength Reproducability (nm) 

Better than 2mn

1

1

Spectral Slitwidth (nm) 

12nm

6nm 

6nm

Photometric Readout  

Lrg 3 LED

Lrg 4 LED

Lrg 4 LED

Photometric Accuracy  

± 1.0%(cuvette)

±0.5% (T)

±0.5% (T)(SRM930D)

Photometric Reproducability   

-

±0.3% (T)

±0.3% (T)

 


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