Product Description

Hanna HI-780 Marine pH Handheld Colorimeter, Checker®HC

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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.

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

Take the vial out and add your reagent

Place your vial into your Checker®HC

Press the button and read the results

Specifications Hanna HI-780 Marine pH Handheld Colorimeter, Checker®HC

Range		6.3 to 8.6 pH
Resolution		0.1 pH
Accuracy @ 25°C/77°F		±0.2 pH
Light Source		LED @ 525 nm
Light Detector		silicon photocell
Method		colorimetric adaptation of phenol red method
Auto-off		after ten minutes of non-use
Environment		0 to 50°C (32 to 122°F); RH max 95% non-condensing
Battery Type		(1) 1.5V AAA
Ordering Information		HI-780 Checker HC is supplied with sample cuvettes with caps (2), pH reagent starter set, battery, and instructions
Accessories purchased separately		HI-780-25 Reagent set for approx. – 100 tests. HI-780-11 Calibration set