411 Home Repair


Latest Articles

5 Easiest DIY Projects For Beginners

The easiest way to cut costs while repairing your house is to do it yourself. But repair work is easier said than done. For most people breaking...

on Oct 25, 2016

The 4 Way Test: How To Choose The Best Bed Mattress For Your Child

There will come a time when your precious bundle of joy becomes too big to sleep in a crib. This is the right time for you to buy your...

on Oct 23, 2016

The Best Way to Clean Your Kitchen Cabinets

Your kitchen is prone to messes more so than any other room in your home. When you consider all of the cooking, eating, socializing, and even the...

on Oct 21, 2016

How to Turn Your Garage into a Home Gym

Getting a gym membership can be a great way to get in shape, but for those who are pressed for time, or lack local facilities, setting up your own...

on Oct 20, 2016

Should You Cut Back On High Speed Internet?

If you’re thinking of cutting back on your expenses, you might think it’s a good idea to cut back on high speed Internet. After all, you reason,...

on Oct 19, 2016

Residual Chlorine Analyzer Applications for Pools

by Guest on Jun 6, 2011

Chlorine meters are used in many applications requiring the measurement of residual chlorine concentration for chlorine monitoring or residual chlorine dosing control.

A residual chlorine analyzer or meter has various applications including:

  • Continuous chlorine monitoring
  • Water treatment plant residual chlorine control
  • Secondary chlorination free chlorine control
  • Distribution monitoring for total residual chlorine
  • Cooling tower chlorine monitoring and control
  • Pasteuriser chlorine dosing control
  • Seawater chlorination control
  • Chlorine in seawater monitor

The membraned amperometric chlorine sensor is enhanced with a third, reference, electrode which eliminates zero drift. pH correction is often not required at all. (NB. These chlorine sensors are often known as polarographic chlorine sensors although this is a misuse of the word polarographic).

The chlorine sensor used by the Residual Total Chlorine Monitors and the Residual Free Chlorine Monitors are both largely pH independent meaning that both chlorine analyzers are bufferless and reagentless. They both utilize amperometric chlorine sensors and both show remarkable sensitivity and stability. For those making a chlorine measurement at high pH (>pH 8.5) on variable pH water it is possible to provide pH compensation from either a pH sensor connected to the chlorine analyser or from an external pH meter.

The chlorine sensors work by separating the electrodes that perform the chlorine measurement from the sample, by a membrane. This membrane allows the free residual chlorine (HOCl and OCl-) or the Total Residual Chlorine (HOCl and OCl- plus chloramines) through the membrane. Inside the sensor the residual chlorine meets the electrolyte which is at a low pH. This converts the majority of the OCl- to HOCl. The HOCl is reduced at the gold working electrode and the current generated is proportional to the Free Chlorine or Total Chlorine present, and the chlorine analyzer gives a reading in chlorine ppm or mg/l.

This technique is the most advanced method of continuous chlorine measurement and has many benefits to the user including a very stable chlorine measurement and better chlorine dosing control.

In addition to residual chlorine measurement the free chlorine sensor determines the chlorine concentration and the chlorine analyzer can control the chlorine dosing using a variety of control algorithms including PID control.

The Residual Chlorine Monitor is bufferless and reagent free, meaning it has a low total cost of ownership and with maintenance intervals at 3 or even 6 months, the HaloSense bufferless Chlorine Monitor is fast becoming the instrument of choice for the engineer who wants the best chlorine monitor at the best price.

The HaloSense Free and Total Residual Chlorine Analyzers are equipped with process control options, datalogging, relay outputs, serial comms, (TCP, Ethernet, ModBus are available now with Profibus available soon). Remote Access of the chlorine monitors (including remote access to all control options) is available via the internet, and via a LAN. In fact the HaloSense range of chlorine analyzer products has all the options you could want in a Chlorine Analyzer whilst maintaining a low cost and great value for money.  

Most Recent Articles

Sponsored Articles

Random Articles

My Top Techniques to Get Organised in the Kitchen

When I graduated from university, I decided to become a better cook. I know that one day I will have a family of my own to feed, and I’d prefer my...

Kitchen / Bathrooms

Mistakes To Avoid When Purchasing Your Ideal Home

Purchasing a house is considered to be a major investment on the buyer's side. It represents years of hard work, plenty of sacrifices that enable...

Real Estate / Finance

3 Staircases to Add Style and Flair to Your Home

A beautiful home is beautified further by internal décor.  A number of small decisions, like a painter’s strokes, encapsulate and finally originate...

Interior Design / Decor

Learning How to Remove Polystyrene Ceiling Tiles

There are many individuals that really like the look of ceiling tiles. Therefore, when they need to replace their old polystyrene ceiling tiles...

Walls / Ceilings / Attics

2-Family Homes - Why Are They So Popular

If you are looking for a profitable investment property or looking to upgrade to a new home, you might consider buying a two family house rather...

Real Estate / Finance


Contact Us | Submit Article | RSS | 411homerepair © 2016