Hanna Instruments HI-99151 Portable pH Meter for Beer Analysis
The HI-99151 is a rugged waterproof, portable pH and temperature meter designed specifically for the brewing industry. The HI-99151 uses the FC2143, a titanium bodied, pH electrode with a flat pH sensor profile and an extendable cloth junction.
The HI-99151 measures pH from -2.00 to 16.00 pH and temperature from -5.0 to 105.0°C. Automatic calibration is done at one or two points with two sets of buffers and all readings are automatically compensated for temperature variations. Indicators for stability, battery percentage and calibration instructions are viewed on the primary display. The HI-99151 uses three 1.5V AAA batteries for an exceptional battery life of 1400 hours of continuous use.
Ideal for brewing operations such as mashing and wort separations, measuring the pH of the cooled wort boil, checking the fermentation pH and checking the finished or conditioned beer.
There are no crevices in the electrode to collect solids and the pH and temperature specifications are pertinent to most brewing operations.
The Effects of pH in Brewing
In the brewing process, the enzymes required to convert starch into sugar are pH sensitive, with an optimal pH of 5.2 to 5.6. 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 pH 4.9, through a common boil pH is pH 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 utilisation during the wort boil is also effected by pH; as pH increases, the solubility of hop resins increase. A high pH also increases the release of tannins, resulting in a harsher taste, and tends to favour elevated microbial activity.
Specifications
| pH | Range -2.00 to 16.00 pH |
| Resolution | 0.01 pH |
| Accuracy | ±0.02 pH |
| Calibration | One or two point calibration, two sets of standard buffers available |
| Temperature Compensation | automatic from -5.0 to 105.0°C |
| Temperature Range | -5.0 to 105.0°C |
| Resolution | 0.1°C |
| Accuracy | ±0.5°C (up to 60°C). ±1.0°C (outside) |
| Additional Specifications: | |
|---|---|
| Electrode | FC2143, pre amplified pH electrode with internal temperature sensor, DIN connector and 1 m cable (included) |
| Battery Type / Life | 4 x 1.5V AAA / approx. 1400 hours of continuous use |
| Environment | 0 to 50°C; RH max 100% |
| Dimensions | 154 x 63 x 30 mm |
| Weight | 196 g |
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Frequently Asked Questions
Clear answers to help you choose the right water testing solution with confidence
Which brands of water testing kits do you supply?
Do you provide kits for both home and professional use?
Yes — whether you’re a pool or spa owner, aquarium keeper, utility company, or a university laboratory, we have the right solution for your needs.
Can I arrange servicing or calibration for my photometer?
Absolutely. We also provide servicing and calibration to keep your photometers accurate and reliable.
How quickly do you dispatch orders?
Orders placed before 2:30 pm (Monday–Friday) are dispatched the same day. We also ship on Saturdays for your convenience.
Which couriers do you use for delivery?
We deliver through UPS, DPD, and Royal Mail. You can also choose to upgrade to next-day delivery at checkout.
What is your return policy?
We accept returns within 14 days of delivery provided the items are unused, in their original packaging, and in resalable condition. Please contact our team before returning any items.
Can I place bulk or business orders?
Yes, we welcome bulk, trade, and institutional orders. For tailored pricing or large quantities, please get in touch with us directly.
How can I get help if I’m unsure which kit to buy?
You can call us at 📞 +44 (0)115888 2726 and our team will guide you in choosing the most suitable kit for your needs.