Hanna Colour of Water (PCU) Portable Photometer – HI-97727
| Brand | |
|---|---|
| Model | HI-97727 |
| Colour range | 0–500 PCU |
| Resolution | 1 PCU |
| Accuracy | ±10 PCU ±5% of reading at 25°C |
| Method | Platinum-cobalt colour comparison by photometry |
| Logging | Automatic logging of 50 readings |
Hanna HI97727 for water colour from 0–500 PCU. Measures prepared filtered or unfiltered samples; colour is different from turbidity. Base instrument; CAL Check standards separate.
£602.93 (inc VAT)
Hanna HI97727 Colour of Water Photometer
Water colour in PCU, using filtered or unfiltered samples
The HI97727 measures water colour from 0 to 500 Platinum Cobalt Units, or PCU. It can be used for apparent colour from an unfiltered sample and true colour after the specified filtration.
PCU is a colour measurement. It is not a turbidity reading in NTU and does not identify the substance responsible for a coloured sample. Choose it when this particular colour method matches the job.
| Specification | Details |
|---|---|
| Model | HI97727 |
| Colour range | 0–500 PCU |
| Resolution | 1 PCU |
| Accuracy | ±10 PCU ±5% of reading at 25°C |
| Method | Platinum-cobalt colour comparison by photometry |
| Memory | Automatic logging of 50 readings |
The blank and sample preparation
The exact manual uses deionised water for the zero reference. It then measures an unfiltered sample for apparent colour, or a sample passed through a 0.45µm membrane for true colour. Follow the method for cuvette preparation and the order of readings.
This colour measurement does not use a colour-forming reagent added to the sample. Allow for suitable deionised water, the required filtration equipment and the sample cuvettes used by the procedure. Keep the cuvette surfaces clean and avoid bubbles.
Base instrument or standards kit
The standard HI97727 package includes two sample cuvettes with caps/stoppers, three AA batteries and documentation. Matched CAL Check standards are separate for the base instrument.
Compare the HI97727C carrying-case kit if you want the matched standards included. The manual separates blank, unfiltered and filtered sample preparation, so check the complete set of cuvettes and filtration items you need.
CAL Check and interpretation
Use HI97727-11 as the named CAL Check standard set and follow the certificate and CAL Check menu for verification and permitted calibration. Those reference cuvettes are different from chemicals added to a test sample.
A colour result should be interpreted alongside the other measurements and observations relevant to the water. It does not tell you on its own whether a pond is healthy or which treatment to add.
Browse our water-testing range to compare other parameters and methods.
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