Hanna Instruments

Total chlorine is given by the sum of free chlorine plus combined chlorine, where free chlorine combines with nitrogen to produce chloramines. Chloramines is harmful to aquatic life and damages water treatment plants that use membranes for water purification (e.g. reverse osmosis). Thus it is important to monitor levels of both free and total chlorine.

Chloramines concentration in water depends on pH, temperature, the initial ratio of chlorine and amines, chlorine demand and total time of exposure. Both forms of chlorine (free and combined) can exist at the same time, though they need to be measured separately.

HI-96724 is an auto-diagnostic portable photometer for accurately measuring free and total chlorine. The advanced optical system employs a specialised tungsten lamp and a narrow band interference filter, assuring accurate readings between 0.00 to 5.00 mg/L.

This instrument is equipped with Cal Check® validation function and standards to validate good performance at any time. Taking just a few short steps, the validation procedure is user-friendly and ensures that the meter is properly calibrated wherever you go. Hanna photometers use the exclusive ready-made, NiST traceable standards to verify the performance of the instrument and recalibrate if necessary.

Cuvettes are constructed from specialised optical glass to ensure the best and most consistent results. The positive locking system ensures that the cuvette is in the same position every time it is placed into the measuring cell. Our sample cell is designed to fit a cuvette with a wide neck to make it easier to add both sample and reagents.

All instruments are factory calibrated and the electronic and optical design minimises the need for frequent calibration. Ideal for field applications, these meters are splash proof and the lamp and filter units are protected from dust or dirt by a transparent barrier. Display messages aid the user during routine operation.

The auto-off feature will disengage the meter after 10 minutes of non-use in measuring mode or 1 hour while in calibration mode. HI-96724 utilises an adaptation of the USEPA Method 330.5 and Standard Method 4500-Cl G. The reaction between chlorine and the reagents causes a pink tint in the sample.

Ordering information

There are two options to buy. The meter only, or the meter complete with the Cal Check standards and carrying case. Please see below:-

The HI-96724 is supplied with 2 cuvettes, battery and instruction manual.

The HI-96724C is supplied with Cal Check standards, 2 sample cuvettes, cuvette cleaning cloth, battery and instruction manual all housed in a robust carrying case.

Please note: that whichever option you choose, you will need to order the relevant reagents from the accessories in order to use your photometer.