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Chlorine Analyzer - HaloSense

The HaloSense range of Residual Chlorine Analyzers are used in many applications requiring the measurement and control of residual chlorine levels. The HaloSense free chlorine analyzer is suitable for chlorine monitoring or chlorine control applications.
A range of residual chlorine analyzers using the HaloSense chlorine sensors means that you get exactly what you need and nothing that you don't. From a low cost no-frills chlorine controller (CRONOS) to a colour touch screen, remote access chlorine controller (CRIUS) - and all with the same great sensors!

Residual Chlorine Analyzer Key Benefits

• Stable and reliable Residual Chlorine Monitor
• Free chlorine analyzers
• Total chlorine analyzers
• Combined chlorine analyzers
• Bufferless chlorine monitor
• Reagentless chlorine monitor
• Low purchase cost
• Low cost of ownership
• Reduced pH dependency
• SMS text alarms
• Remote Access via Internet
• 4-20mA and relay Outputs
• Download brochure

New! Residual Chlorine Monitor now available with up to four chlorine sensor inputs, reducing the cost per point of your bufferless residual chlorine analyzer. Chlorination control is now simpler and cheaper than ever!

Residual Chlorine Analyzer Applications

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

Autoflush

As described in seperate brochures, the HaloSense chlorine analyzers can come equipped to automatically clean themselves or calibrate themselves at user defined intervals, with all the benefits of no operator intervention for 6 months. The Autoflush is particularly useful in food preparation, pulp and paper, and many applications where there is likely to be a build up of solids in the sample. For more information click here.

Principle of Operation

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

The 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 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 analyzer or from an external pH meter.

The sensors work by seperating 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 or Total Chlorine present, and the analyzer gives a reading in 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 dosing control

The HaloSense Residual Chlorine Monitors are bufferless and reagent free, meaning they have 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 analyzers has all the options you could want in an analyzer whilst maintaining a low cost and great value for money.