VIS721 | Visible Spectrophotometer

The VIS721 Visible Spectrophotometer is a routine laboratory instrument used for colorimetric analysis in the visible wavelength range from 340nm to 1020nm. It is suitable for samples that already have color or can be reacted with color-developing reagents before measurement. This makes it useful for water testing, wastewater analysis, soil and agriculture labs, food testing, chemical QC, teaching labs and industrial quality control. Common applications include iron testing with 1,10-phenanthroline; phosphate/phosphorus testing via blue phosphomolybdate complex formation; copper testing using blue ammonia complexes; chromium VI analysis with diphenylcarbazide; manganese testing with permanganate; and nitrite/nitrate analysis using colour-forming methods such as the Griess reaction.

Pro Tip

A visible spectrophotometer yields the best results when paired with the correct reagent method. Always confirm the wavelength, blank solution, reaction time, and calibration curve before testing; incorrect reagent preparation can yield poor results even when the instrument is working correctly. Buy VIS721 Visible Spectrophotometer from Kamadi Pakistan for practical visible-range laboratory and colorimetric testing.

Buyer’s Selection Guide

Choose the VIS721 if your laboratory performs visible-range colorimetric tests for water, wastewater, soil, agriculture, food, education or chemical analysis. It is suitable for routine absorbance, transmittance and concentration work where the test method produces a visible colour. For UV applications below 340nm, such as DNA, protein or UV absorbance analysis, select a UV-Visible spectrophotometer instead.

Key Features

• Visible-range spectrophotometer for colorimetric testing
  
• 340–1020nm wavelength range
  
• Absorbance, transmittance and concentration modes
  
• Suitable for iron, phosphate, copper, chromium, manganese and nitrite tests
  
• RS232 output for data connection

Technical Specifications

• Model: VIS721
  
• Product Type: Visible Spectrophotometer
  
• Optical System: Single beam, grating 1200 lines/mm
  
• Wavelength Range: 340–1020nm
  
• Spectral Bandwidth: 6nm
  
• Wavelength Accuracy: ±3nm
  
• Wavelength Repeatability: 1nm
  
• Photometric Accuracy: ±1%T
  
• Photometric Repeatability: 0.5%T
  
• Light Source: Tungsten lamp
  
• Cuvette Holder: 10mm manual 4-cell holder

Applications

• Water and wastewater colorimetric testing
  
• Iron, phosphate and chromium VI analysis
  
• Soil, fertilizer and agriculture lab testing
  
• Food, beverage and chemical QC analysis
  
• Educational and routine laboratory experiments