CHLORINE ANALYSER

The Turtle Tough Chlorine Analyser is suitable for total or free residual chlorine monitoring or control applications in potable water, seawater, process water, swimming pool water, waste water, food washing, paper and pulp, etc.

• Low purchase cost
• Low cost of ownership
• Reduced pH dependency – largely pH-independent
• Stable and reliable
• Bufferless
• Reagentless

https://www.turtletough.com.au/product/chlorine-analyser-2/

The Turtle Tough Chlorine Analyser is a Free Chlorine Analyser.  The sensor is a membrane amperometric type which has been advanced with a third reference electrode to eliminate zero drift.  This unique design makes it less dependent pH, meaning that pH compensation is not usually required at all, completely eliminating reagents.

Many water companies want to measure free chlorine residuals without the need for chemical buffers traditionally associated with such measurements. Acetate and phosphate buffers are expensive and environmentally unfriendly. Buffer delivery systems are maintenance intensive and have fairly costly consumables and there are health and safety considerations in the handling of the acids and high disposal costs if the acid treated water is unable to be fed back into the water supply.

The sensor has outstanding sensitivity and stability and being largely pH-independent means that the measurements do not require buffers or reagents.  For high pH applications (ie where pH >8.5) it is possible to provide pH compensation from an additional pH sensor connected to the analyser.

The sensors work by separating the electrodes that perform the 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 dissolved 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 chlorine present, and the instrument 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 online measurement and better dosing control.

The Turtle Tough Chlorine Analyser (TT-Cl) is both bufferless and reagent free, meaning that it has a low total cost of ownership and maintenance intervals are as low as 6 months intervals.   The TT-CL is fast becoming the class leading Chlorine Analyser for operators who demand quality, hassle free operation at the lowest cost of ownership.

The Turtle Tough Chlorine Analysers are available in the following ranges

• Online free and total chlorine analysers 0.01-2 ppm, 0.01-5 ppm, 0.01-10 ppm, 0.01-20 ppm, 0.01-200 ppm (free only)
• Online residual chlorine in seawater analysers (free or total bromine) 0.01-2 ppm, 0.01-5 ppm, 0.01-10 ppm, 0.01-20 ppm
• Online zero chlorine (designed to measure the absence of free chlorine) 0.01-2 ppm for applications such as post activated carbon and pre-RO monitoring.

Working Model

The Turtle Tough Chlorine Analyser (TT-Cl), comes with amperometric sensors and show remarkable sensitivity and stability. For those needing to measure chlorine 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 transmitter or from an external pH meter.

The sensors work by separating the electrodes that perform the 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 dissolved 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 chlorine present, and the instrument 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 online measurement and better dosing control.