Single-channel controller

The TOPAX® L single-channel controller performs precise monitoring and control of water quality in real time. Ideal for a wide range of applications, this single-channel controller guarantees constant water values and meets the highest standards.

Your versatile partner for water treatment


The TOPAX L single-channel controller monitors water values during water treatment and wastewater treatment and controls a dosing system connected for water treatment in real time. In this way, it ensures constant water values in various applications – taking into account the given standards and directives. Available in different versions, each model features specific measurement and control functions, including free chlorine, chlorine dioxide, hydrogen peroxide, pH value, Redox potential or conductivity. All models measure the temperature. In addition, the TOPAX® L provides the flexibility required to connect various optical and diaphragm covered measuring cells.


Discover the full range of measurements:

  • pH / ORP (Redox)
  • Free chlorine
  • Total chlorine
  • Ozone
  • Peracetic acid
  • Bromine
  • Turbidity
  • Flow rate
  • Conductivity
  • Chlorine dioxide
  • Hydrogen peroxide
  • Chlorite
  • Dissolved oxygen
  • Suspended solids

This wide measuring capacity makes the single-channel controller an indispensable tool for performing precise and reliable water quality controls in every application.

Product information

Our complete range of single-channel controllers

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TOPAX L
Your versatile partner in water treatmentThe TOPAX L single-channel controller monitors the water values present during water treatment and wastewater treatment and controls a dosing system connected for water treatment in real time. In this way, it ensures constant water values in a wide range of applications in compliance with the relevant standards and guidelines. Available in different versions, each model is characterised by specific measurement and control functions, including free chlorine, chlorine dioxide, hydrogen peroxide, pH value, redox potential or conductive conductivity. In addition, the TOPAX® L offers the flexibility to connect various optical and membrane-covered measuring cells. Features pH / ORP (redox) Free chlorine total chlorine ozone peracetic acid bromine Turbidity Flow rate Conductivity Chlorine dioxide Hydrogen peroxide Chlorite Dissolved oxygen Suspended solids
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Lutz-Jesco GmbH | Austria
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