Tytronics FPA 4000/4100 – Photometer


Calorimeter, Ion Selective Electrode, Titrator

Analyzed liquids

Water quality



  • Description


Tytronics FPA 4000/4100

The FPA 4000/4100 is an online dual filter photometer capable of measuring the concentration of many analytes in process liquid or gas streams.

The FPA 4000/4100 uses well established spectrophotometric techniques to perform the measurement. In general, energy from a source lamp is transmitted to a measurement cell via a multi-stranded fiber optics bundle. The sample continuously flows through the cell, where the analyte of interest will absorb energy from the light source. The energy that passes through the cell is then transmitted to a set of photodetectors via a bifurcated fiber optics bundle. The amount of energy absorbed by the sample is proportional to the
concentration of the analyte in accordance with Beer’s Law.



  • Chlorine dioxide
  • Ozone
  • Hydrogen sulphide
  • Sulphur dioxide
  • Nitrogen oxides
  • Chlorine in vent gases


  • Oil in water
  • UV-254 TOC
  • Aromatics in solution
  • Oil in boiler condensate
  • COD (chemical oxygen demand)
  • Hazen color of water and solvents
  • ASTM color
  • Saybolt color of fuels and oils
  • Chlorine in water
  • Hypochlorite for deodorizing control
  • Copper in concentrate and plating solutions
  • Nickel and cobalt in electro-winning solutions
  • Permanganate in water
  • Nitrate in water
  • Leakage of heat exchange fluids (eg, dowtherm and therminol)
  • Para-tert-butylcatechol in butadiene
  • Phosgene in process streams
  • Chlorine in phosgene
  • % Water in organic solvents

…many other applications available

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