___________Capital Controls
slvrline.jpg (1988 bytes)

Plant efficiency and operational/environmental safety are the main priorities for water and waste water plant operators today. The very nature of raw water and process water means that the rate of any chemical dosed is unpredictable. In many countries regulatory statutes dictate stringent control of both plant effluent quality and on site safety.

These two factors have contributed to the design of many new technologies in recent years. At Capital Controls we have firmly embraced the changes in our industry and have sought to develop a complete range of solutions to these control and safety requirements.

Our Products

  • Disinfection Systems
  • Process Control and Safety Systems
  • Water Quality Monitors

capcon3.GIF (1491 bytes)

Disinfection Systems

Public health and safety issues are paramount to those responsible for treating waste water and producing drinking water. Industrial processes using water and/or producing an effluent are also regulated to protect both the environment and the public.

Disinfection provides a means of reducing pathogens from water and thereby reducing the risk to public health. The type of disinfection method selected depends on the incoming water quality, the quality requirement of the finished product and local/federal regulations.

Depending upon your application, there are many disinfectants and disinfectant methods available. This section illustrates the range of alternatives.

By far the most common disinfectant is chlorine. Whether purchased as a gas, liquid or produced on-site, chlorine disinfection is practiced in every country around the world.

  • Chlorine and Safety
  • Simple gas feed systems for chlorine and other gases
  • Gas feed systems for larger plants
  • High feed rate systems
  • On site generation of sodium hypochlorite
  • On site generation of chlorine dioxide
  • Super efficient gas induction for water treatment
  • Disinfection by Ultraviolet Light

capcon3.GIF (1491 bytes)

Process Control and Safety Systems

  • Instrumentation to control and monitor chlorine systems
  • Automatic valves for gas feed
  • Chlorine and sulfur dioxide gas leak detectors
  • Gas cylinder weighing scales
  • Chart recorders


capcon3.GIF (1491 bytes)

Water Quality Monitors

The need to automate water processes is growing rapidly. This is due in part to a desire for greater efficiency, and therefore cost savings, but also in response to tighter environmental controls for discharges and supply.

Capital Controls’ range of chlorine analyzers has a pedigree which is unsurpassed. From the sophistication of parts per billion analysis, to the world’s top selling all purpose chlorine analyzer to our reagent free low cost analyzer, we have a solution for every application.

Water quality monitors have been around for many years. In Europe, E.C. legislation of drinking water in particular has created a requirement for on-line monitors for various parameters. Operators take advantage of the technology by also using the data for control purposes.

In many cases monitoring equipment serves a dual purpose. This makes them an important part of the plant process. It is this factor that makes Capital Controls Aztec Series 100 Water Quality Monitors so attractive, for use detecting:

  • Ammonia
  • Residual coagulant - aluminum and iron
  • Chlorine
  • Color
  • pH, conductivity, dissolved oxygen, ORP and temperature
  • Fluoride
  • Manganese
  • Nitrate
  • Phosphate


capcon3.GIF (1491 bytes)


An Example of One of Capital Controls Aztec Series 100 Water Quality Monitors:

capconammonia.gif (84318 bytes)



Ammonia is a key parameter in water and waste water. Often used as an indicator of the presence of contaminants in surface water, the measurement of ammonia at the inlet of a drinking water treatment plant is key to early warning process action.

Ammonia measurements are also used as a part of chloramination schemes. In the chloramination process, ammonia is added to treated water, prior to chlorine addition to form chloramines. Chloramines are a form of disinfectant that, unlike chlorine alone, prevent the production of carcinogenic trihalomethanes (THM’s) in the presence of organics. Naturally, in this environment it is important to know what the concentration is of both residual chlorine and ammonia.

Ammonia nitrogen is also a key parameter in waste water processes, both upstream and in the final effluent. This is particularly true when waste water operators have their discharge permitted for nitrites.

Capital Controls A100 Ammonia Monitor was designed with all of these issues in mind. A stand alone, self calibrating monitor, the A100 can be trusted to provide constant and consistent ammonia results. It uses the tried and tested ion selective electrode (ISE) method. The ISE responds to changes in ammonia concentration very sensitively and can be calibrated across a broad range of measurements.

To measure ammonia with an ISE you first have to add an alkali (to pH > 10.5) and raise the temperature (to 96F). If this doesn’t happen correctly then the ammonia value the ISE provides cannot be trusted. The A100 is unique in that it automatically polices the pH and temperature of the sample to ensure that it is being correctly prepared.

To order literature for this or any product, you can go to
their website at www.capitalcontrols.com, or

Return To Equipment PagesReturn To Home PageRequest More Information From EDP