Hanna Instruments Foodcare Portable pH Meters are durable, waterproof, and designed specifically for the analysis of beer, food & dairy, milk, yogurt and cheese, with specifically optimized pH electrodes.
- Waterproof - rated IP67 for immersion in up to one meter of water for 30 minutes
- Automatic Calibration - One or two-point calibration is automatic to two selectable buffer sets
- Automatic Temperature Compensation – An integrated temperature sensor allows for automatic temperature compensation of pH measurements.
- Battery Error Prevention System (BEPS) - Alerts the user of low battery power and will automatically shut off if there isn’t enough power to obtain an accurate measurement.
- Battery Life Indicator - The battery percent level is displayed at start up alerting the user to the remaining battery power that is available.
- Multi-Level LCD Display - The split-level LCD displays both pH and temperature readings, along with indicators for reading stability, battery percentage, and calibration instructions.
- On-Screen Tutorial - Clear tutorial messages and directions are available on-screen to quickly and easily guide users through setup and calibration.
The Hanna Instruments HI99151 is a durable, waterproof, and portable pH and temperature meter designed specifically for beer analysis.
pH is measured at various points during the brewing process. This electrode is intended to measure the pH of the mash for the optimization of starch conversion. The enzymes required to convert the starch into sugar are pH-sensitive with an optimal pH range between 5.2 and 5.6 pH. Different compounds are used to adjust the pH including phosphoric acid, lactic acid, and gypsum.
Wort clarity and break formation are also affected by pH. Protein coagulation occurs during wort boiling, where the optimum pH is around 4.9, even though a common boil pH is 5.2. A pH that is too high will not only inhibit coagulation but also promote browning due to the interaction of amino acids and reducing sugars.
Hop utilization during the wort boil is also affected by pH. As pH increases, the solubility of hop resins increases. Unfortunately for hop lovers, a high pH also increases the release of tannins resulting in a harsher taste. Higher pH also favors elevated microbial activity.
As a living catalyst, yeast maintains a pH around 6.5 within its cells; however, the preference is to inhabit a more acidic environment. During the fermentation stage, the pH should be lower to accommodate the yeast and also to ensure microbial stability and consistent flavoring of the beer; an optimal pH range during fermentation is between pH 4.1 and 4.3.
The HI99151 uses the FC2143 amplified pH electrode with titanium body. Titanium construction provides an unbreakable structure and allows the transfer of heat to the internal temperature sensor for rapid temperature compensation. The probe’s flat sensing tip has a wide surface area for measurement in aqueous solutions.
This pH electrode can be used to measure the wort before and after boiling. It is important to note that if used after the boil that the wort be allowed to cool to below 80°C (176°F) in order to prevent damaging the sensitive glass.
A typical pH electrode has a junction made of cloth material. This cloth material can be easily clogged by samples such as mash, which has a high solids content, or wort, which is viscous. With the cloth junction of the FC2143 it is possible to clear any obstruction by simply extracting 1/8” of the junction from the electrode. This exposes a new, renewed portion.