These high quality reagents are clearly marked with the lot number and expiration date on each package for traceability.

The HI-770-25 are high quality, pre-measured reagents that allow users to make fast and accurate measurements with their Silica High Range Checker® HC. These reagents follow the standard 4500-SiO2C method, where the reaction between silica and reagents produces a yellow tint in the sample. By simply adding the HI-770-25 reagent packet to the sample, the reaction occurs and the HI-770 determines the concentration based on the color produced. Results are displayed in ppm silica. These reagents are designed for use with samples with an expected silica range of 0 to 200 ppm.

Tip for an accurate measurement

It is important that the sample does not contain any dirt.

When the cuvette is placed in the measuring cell, it must be dry on the outside and completely free of fingerprints, oil or dirt. Wipe the cuvette thoroughly with HI-731318 or a lint-free cloth before inserting.

Shaking the cuvette may cause air bubbles to form, which will result in higher readings. For accurate measurements, remove such air bubbles by swirling or gently tapping the cuvette.

Do not leave the reacted sample standing for too long after the reagent is added, otherwise the accuracy will be lost.

After measurement, it is important to discard the sample immediately, otherwise the glass may become permanently discoloured.

Four steps. One click. Instant readout.

• 1. Zero the Checker®HC with your bottle in it.
• 2. Place a 10 ml water sample in the bottle and add your reagent.
• 3. Place your bottle in your Checker®HC.
• 4. Press the button and read the results.

Also available: HI-770-11 calibration kit.