Why is it important to never touch the glass bulb at the end of a pH meter?

Why not? Because what the pH meter is actually measuring are tiny, tiny changes in electrical potential. If you wipe the surface of the bulb, you can induce a tiny static electrical charge on the surface of the glass.

How do you calibrate a pH meter?

How to calibrate a pH meter

Examine the pH electrode. First, check the pH electrode for contamination or damage.
Flush the pH sensor. Next, flush your sensor with distilled water.
Immerse the pH electrode.
Calibrate the pH meter.
Rinse the pH sensor and repeat.

How do you use Hanna cleaning solution?

The cleaning solution to use . . .?: (Non-aggressive formula). Soak in HANNA Protein Cleaning Solution (HI-7073) for 15 minutes to enzymatically dissolve deposits from protein sources. Soak in HANNA Inorganic Cleaning Solution (HI-7074) for 5 to 15 minutes.

Which Hanna PH meter should I Choose?

The low range Combo® pH, EC, TDS (ppm) and temperature meter is one of Hanna’s most popular meters. The waterproof design, simple operation, and replaceable electrode mean that you can rely on this meter for years. The HI98129 is designed for low range use (0 to 3999 µS/cm or 0-2000 ppm). Choose the HI98130 for the high range model.

What does the Hanna Instruments Hi 98129 measure?

The Hanna Instruments HI 98129 is a multi-parameter tester that measures pH, electro-conductivity (EC), total dissolved solids (TDS), and temperature, and features automatic temperature compensation (ATC), an LCD screen, automatic shut-off, and a waterproof body that floats in water.

How accurate is the hi98129 pH meter?

The HI98129 is a highly accurate, waterproof pH meter that can also measure EC/TDS in the low range (0 to 3999 µS/cm EC/ 0 to 2000 ppm TDS) and temperature. This floating, waterproof combination tester has an easy to read, LCD and an automatic shut-off.