Checker photometer for pH in seawater

HI780 Details:

The HI-780 Checker HC is a simple, accurate, and cost effective way to measure pH in seawater. Designed as a more accurate alternative to chemical test kits, this handheld colorimeter provides quick, accurate pH testing results.

pH of ocean surface water is normally 7.5.to 8.5 pH.

Over the years however, acidification tendency is to decrease 0.1 to 0.2 pH units/century. Acidification is a consequence of carbon dioxide (CO_₂) absorption in seawaters and oceans. Carbon dioxide reacts with seawater to produce carbonic acid (H_₂CO_₃).

pH modifications affect marine life growth, reproduction, and communication. Hydrogen ions have a tendency to bond with carbonate to form bicarbonate. The greater attraction to carbonate over calcium can adversely affect skeleton building and can limit coral growth.

• Ideal for aquariums and marine biology
• Easier to use and more accurate than chemical test kits
• Small size, big convenience

Four steps. One click. Instant Readout.

  1. ‘Zero’ the Checker®HC with your vial & 10ml water sample inside

  2. Take the vial out and add your reagent

  3. Place your vial into your Checker®HC

  4. Press the button and read the results

HI780-11 Details:

The pH Checker HC® Calibration Check Set – HI-780-11 provides a simple solution to validating the pH Checker® HC – HI-780. HI-780-11 Marine pH Certified Cal Check Standards. This high-quality set of standards is supplied with a Certificate of Analysis. 

HI780-25 Details:

The HI-780-25 is the replacement reagents for the HI-780 Marine pH Checker® HC. These high-quality reagents are clearly marked with the lot number and expiry date on the dropper bottle for traceability. 

HOW TO TEST

Press the ON/OFF button to turn the checker on. All segments will be displayed for a few seconds, followed by “Add”, “C.1” with “Press” blinking.

Fill the cuvette with 10 mL of unreacted sample and replace the cap. Insert the cuvette into the checker and close the cap

Press the ON/OFF button. When the display shows “Add”, “C.2” with “Press” blinking, the checker is zeroed

Remove the cuvette. Unscrew the cap and add 5 drops of HI-780-25 pH reagent indicator. Replace the cap and invert 5 times to mix

Insert the cuvette into the checker and press the ON/OFF button. The instrument displays the result in pH. The checker automatically turns off 10 minutes after reading.