Disinfectant Controllers

Chlorine is the most common disinfectant in water treatment. It is readily available, low-cost and generally used in potable water and in swimming pools but also increasingly in cooling towers and other process water applications


Chlorine dioxide is a strong oxidant, commonly used for disinfecting potable water and in food applications. For some applications it is preferred since it does not affect the aroma of the treated water.


Peracetic acid has been used as a disinfectant in the food and beverage industry for decades. In the meantime, its scope of application also includes many other areas such as CIP (clean-in-place), washing installations, pulp and paper industry as well as agriculture.


Ozone is the strongest oxidizer used in water treatment. Generally, it is utilized in potable water for disinfection, oxidation, and aroma control – in swimming pools (therapy pools), zoos and aquariums as well as in the food industry.

 

Our controllers are perfectly fitted to the needs of disinfection applications such as cooling towers, food industry, bottling, CIP (clean-in-place), potable water, wastewater, washing installations, pulp and paper, reverse-osmosis systems, swimming pools, therapy pools, zoos and aquariums.

Disinfection controller WDS600

The Walchem WDS600 offers state-of-the-art technology for automating your disinfection processes.
Several water circulations can be treated at the same time. The controller supports a multitude of sensors. Select between mechanical relays or optical-coupler outputs to proportionally control dosing pumps with contact input. An integrated logging function makes for a complete documentation of the water treatment.

 

The WDS600 features two universal sensor inputs or up to four 4-20 mA inputs for:

  • Free chlorine / bromine
  • Total chlorine
  • Chlorine dioxide
  • Ozone
  • Hydrogen peroxide
  • Peracetic acid
  • Any other sensors with output signals ranging from -2000 to +1500 mV
  • pH/ORP sensors
  • Conductive conductivity-measuring cells with different cell constants
  • Inductive conductivity electrodes
  • Fluorescence sensors (for PTSA or fluorescein)

Six digital inputs can be used for different purposes:

  • Flow switches or other external contacts for disabling the control
  • Water flow meters for dosing chemicals in proportion to quantity

Six relay outputs can be preset to different control modes:

  • On/Off set-point
  • Dosage based on a water flow meter
  • Dosage with switchover between two set-points
  • Timer-based activation
  • Time-proportional control
  • Probe wash
  • In-range or out-of-range activation
  • Common alarm

Via two optional, insulated analog (4-20 mA) outputs, measured values can be transmitted toward a PLC or any other device. Alternatively, the fluid quantities of dosing pumps can be controlled.

 

A USB interface is intended to read out the memory, to import/export configuration files and to update the controller software.

An Ethernet board enables remote access via the Internet or LAN.

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Disinfection controller WDS100W (wall mount)

The Walchem WDS100W provides an economical entry and a very flexible way to control disinfection processes in food and beverage treatment, neutralization and disinfection of wastewater, potable-water treatment.

A universal sensor input means extraordinary flexibility for selecting the sensor:

  • Free chlorine / bromine
  • Total chlorine
  • Chlorine dioxide
  • Ozone
  • Hydrogen peroxide
  • Peracetic acid
  • Any other sensors with output signals ranging from -2000 to +1500 mV

Two digital inputs can be used for different purposes:

  • Flow switches or other external contacts for disabling the control
  • Water flow meters for dosing chemicals in proportion to quantity

Three relay outputs can be preset to different control modes:

  • On/Off set-point
  • Dosage in proportion to quantity based on a water flow meter
  • Timer-based activation
  • Time-proportional control
  • Probe wash
  • In-range or out-of-range activation
  • Common alarm

Via an optional, insulated analog (4-20 mA) output, measured values can be transmitted toward a data logger, a PLC or any other device. Alternatively, the fluid quantity of a dosing pump can be controlled.

A USB interface is intended to update the controller software and to read out diagnostic protocols.

Disinfection controller WDS100P (panel mount)

The Walchem WDS100P provides an economical entry and a very flexible way to control disinfection processes in food and beverage treatment, neutralization and disinfection of wastewater, potable-water treatment.

A universal sensor input means extraordinary flexibility for selecting the sensor:

  • Free chlorine / bromine
  • Total chlorine
  • Chlorine dioxide
  • Ozone
  • Hydrogen peroxide
  • Peracetic acid
  • Any other sensors with output signals ranging from -2000 to +1500 mV

One digital input can be used for different purposes:

  • Flow switches or other external contacts for disabling the control
  • Water flow meters for dosing chemicals in proportion to quantity

Four relay outputs can be preset to different control modes:

  • On/Off set-point
  • Dosage in proportion to quantity based on a water flow meter
  • Timer-based activation
  • Time-proportional control
  • Probe wash
  • In-range or out-of-range activation
  • Common alarm

Via an optional, insulated analog (4-20 mA) output, measured values can be transmitted toward a data logger, a PLC or any other device. Alternatively, the fluid quantity of a dosing pump can be controlled.

A Micro-USB interface is intended to update the controller software and to read out diagnostic protocols.

Disinfection controllers sensors and controls chemicals

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