Cyanuric acid (CYA) is best known as a stabilizing reagent for chlorine. It is widely applied in swimming pool and spa treatment programs to slow down the decomposition of hypochlorous acid. In outside pool areas, this process is accelerated by the effects of UV rays. When applied properly it can save up to 80% of normal chlorine consumption in pools during peak months. Cyanuric acid is also used in chlorinated bleaches, selective herbicides and whitening agents.
The HI97722 uses an adaptation of the turbidimetric method to measure cyanuric acid concentrations up to 80 mg/L (ppm). When added to a sample containing cyanuric acid, the reagent will react to cause a white suspension; the greater the concentration of cyanuric acid, the more turbid the sample. The associated change is colorimetrically analyzed according to the Beer-Lambert Law. As the change in turbidity of the reacted sample increases, absorbance at a specific wavelength of light also increases, while transmittance decreases.
- LED that generates very little heat.
- 8 nm narrowband interference filter that is accurate to +/- 1 nm.
- Reference detector that modulates the voltage to LED for consistent light output.
- A concave focusing lens that reduces errors from imperfections in the cuvette.
HI97722 is an advanced portable photometer for the measurement of cyanuric acid in water. This meter offers a superior optical system that utilizes a reference detector and narrow band interference filters for extremely fast and repeatable measurements.
- No warm up time before taking a measurement
- Tutorial mode for step-by-step instructions
- CAL Check to verify meter performance
Advanced features including CAL-Check to verify performance and if necessary, recalibrate.
Backlit dot matrix LCD that offers an exceptionally intuitive user interface that is easy to read and understand.
Tutorial mode for step-by-step instructions to guide a first-time user in how to perform a measurement correctly.
Built-in reaction timer that ensures consistency amongst multiple users.
Manual : Download
|Product Name||Cyanuric Acid Portable Photometer|
|Cyanuric Acid Range||0 to 80 mg/L (as CYA)|
|Cyanuric Acid Resolution||1 mg/L|
|Cyanuric Acid Accuracy||±1 mg/L ±15% of reading at 25°C|
|Cyanuric Acid Method||adaptation of Turbidimetric Method|
|Photometer/Colorimeter Light Source||LED with 525 nm bandpass filter|
|Photometer/Colorimeter Light Detector||silicon photocell|
|Bandpass Filter Bandwidth||8 nm|
|Bandpass Filter Wavelength Accuracy||±1.0 nm|
|Cuvette Type||round 24.6 mm diameter (22 mm inside)|
|Display||128 x 64 pixel B/W LCD with backlight|
|Logging Memory||50 readings|
|Battery Type/Life||1.5 V AA Alkaline (3 pcs.) / > 800 measurements (without backlight)|
|Automatic Shut-Off||after 15 minutes of inactivity (30 minutes before a READ measurement)|
|Environment||0 to 50°C (32 to 122°F); 0 to 100% RH (IP67)|
|Weight||380 g (13.4 oz.)|
|Dimensions||142.5 x 102.5 x 50.5 mm (5.6 x 4.0 x 2.0″)|
|Ordering Information||HI97722C is supplied with cuvettes (2), caps (2), plastic stopper(2), 1.5V AA batteries (3), instruction manual, and instrument quality certificate|