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Comparator / color disc for 4,0 - 10,0 pH

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SKU: 147011

Manufacturer: Hach

Availability: Order only

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Comparator / color disc for measuring pH in the middle range 4,0 - 10,0.

Model: 17N

Smallest increment: 0.5

Test - kit included:

wide range indicator solution (article: 2329332)
color disc (article: 990100)
color comparator box
two plastic tubes
instruction sheet
carrying case

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Description Specifications Recommended products Accessories

Description

Most natural waters have a pH of 4 to 9, but they are usually higher than 7 due to carbonates and bicarbonates (alkalinity). The PH of industrial water, boilers and swimming pools is usually in a narrow range.

Before using the single-parameter test place the colored disc on the center post in the color comparator box (numbers on the front) and rinse the tubes with the sample. After finishing to do a test rinse the tubes with deionized water.

For more accurate results use a buffer solution as a sample. Chlorine with a concentration of more than 1 mg/L interferes with the test. To remove chlorine from a sample, add 1 drop of 0.1 N sodium thiosulfate solution per 25 ml of sample and mix and then use this dechlorinated sample in the test procedure. Sodium thiosulfate removes a maximum of 10 mg/L chlorine from the sample.

Step-by-step instructions for testing with the test-set Hach 17N:

Fill the tube with a sample to 5 ml;
Place the test tube - on the left in the color comparator box;
Add 6 drops of indicator solution to the second tube;
Rotate the tube to mix the sample;
Place the second tube in the color comparator box;
Keep the color comparator box out in the light (use sunlight or a desk lamp). Rotate the color wheel until the colors match. If the color is the same between two segments use the value in the middle of the two segments;
Compare obtained results in pH.

Specifications

Application area	Test kits, Wastewater, Reagents, Water supply
Type	Portable
Industry	Chemical, Municipal
Parameters	pH
Measurement Range	4,0 - 10,0 pH
Method	Wide range indicator
Number of tests	300

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