pH

Parameter Selection

Application Importance of pH in Winemaking

The first essential step to producing a high quality is to measure the pH of juice and must. The measurement of pH occurs at each step of the process from pre-fermentation, fermentation, post-fermentation and at bottling.

A variety of factors and processes depend on pH including microbial stability, sulfur dioxide effectiveness, malolactic fermentation performance, protein stability, and sensory attributes.

A wine’s microbial and chemical stability is influenced by pH due to the influence it has on the various forms of sulfur dioxide that will be present. Sulfur dioxide is responsible for protecting wine against oxidation and microbial activity. The molecular form of sulfur dioxide is most effective against microbes and is predominate at lower pH values. As the winemaking process progresses pH levels can change due to acid conversion and other metabolic activity. These changes require frequent monitoring of the pH values and sulfur dioxide levels of wine being stored or aged.

Most wines have a pH value between 3.0 and 4.0. White wines tend to have pH values between pH 3.0 and 3.3, while higher pH values between 3.3 and 3.5 are more common for reds. Red wines sometimes have a higher pH, in part, due to the longer contact time the grape juice has with the grape skins. Early in the winemaking process and sometimes at points throughout, it may be necessary to make acid additions in order to set and maintain an optimum pH range for the desired style or condition of the wine. The pH of finished wine may also affect its color. For example, pigment compounds in the wine express different hues of color depending on the pH.

Meters

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HI5000 Series Research Grade Laboratory Benchtops

The HI5000 series is our most advanced benchtop pH meters incorporating the latest microprocessor to bring exceptional features and performance for the most demanding user. These meters are completely customizable to user specific requirements. These research grade meters have many features including:


  • CAL Check pH diagnostics to ensure accurate measurements
  • Easy to use as you are guided through every aspect of operation
  • Large color LCD that is sharp and easy to read
  • Factory calibration service plan available
  • Capacitive Touch Keypad that is easy to clean
  • Logging and USB connection for data management
  • 4 models to choose from:
    • 1 or 2 input channels
    • pH, ISE and/or Conductivty/TDS probe inputs
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HI5000 Series Research Grade Laboratory Benchtops

The HI5000 series is our most advanced benchtop pH meters incorporating the latest microprocessor to bring exceptional features and performance for the most demanding user. These meters are completely customizable to user specific requirements. These research grade meters have many features including:


  • CAL Check pH diagnostics to ensure accurate measurements
  • Easy to use as you are guided through every aspect of operation
  • Large color LCD that is sharp and easy to read
  • Factory calibration service plan available
  • Capacitive Touch Keypad that is easy to clean
  • Logging and USB connection for data management
  • 4 models to choose from:
    • 1 or 2 input channels
    • pH, ISE and/or Conductivty/TDS probe inputs
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edge pH meters

The versatile edge pH meters are just a 1/2” thick and can be used as a benchtop, portable or as a wall mount to save valuable bench space. The HI2020W edge is made specifically for the Winemaker being supplied with a high performance pH electrode made specifically to withstand the high solids content found in grape juice and must. edge meters feature:

  • Capacitive touch keypad
  • Digital pH electrodes with built in temperature sensor
  • Built-in rechargeable battery
  • GLP Data for tracking calibration data
  • CAL Check pH diagnostics
  • USBs for flash drive or computer connectivity

The edge family of meters include both multi-parameter versions and dedicated versions that only measure pH.

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Portable pH Meters

Portable meters provide the versatility to bring the meter to the sample. For the winemaker we offer a simple two button operation application specific version that is supplied a pH electrode for wine juice and must. For users that are looking for a more advanced versions we offer portable meters with the features and performance of a benchtop.


Application Specific Meter Features:

  • CPS Sleeve anti-clogging technology
  • Simple two button operation

Professional Portable Meter Features:

  • GLP data for tracking calibration data
  • CAL Check Diagnostics
  • USB for data transfer
  • pH/ and pH/ISE versions
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Portable pH Meters

Portable meters provide the versatility to bring the meter to the sample. For the winemaker we offer a simple two button operation application specific version that is supplied a pH electrode for wine juice and must. For users that are looking for a more advanced versions we offer portable meters with the features and performance of a benchtop.


Application Specific Meter Features:

  • CPS Sleeve anti-clogging technology
  • Simple two button operation

Professional Portable Meter Features:

  • GLP data for tracking calibration data
  • CAL Check Diagnostics
  • USB for data transfer
  • pH/ and pH/ISE versions
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Waterproof pH Testers

Testers or Pocket meters are the most affordable pH meters available. They are simple to operate and allows everyone, from the hobbyist to professional, to measure pH accurately and economically. These powerful meters include the following features:

  • Replaceable pH electrode
  • Automatic Temperature Compensation
  • Extractable cloth junction to clear any clogging from solids found in wine juice or must
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Halo pH Electrode

Halo Bluetooth Smart pH electrodes allow the ability to use a compatible Apple or Android device as a professional pH meter using the Hanna Lab App.


The HI10482 Halo pH electrode includes a built-in temperaturesensor for automatic temperature compensated measurementsand will automatically update the calibration buffer set to include pH 3.00 and 7.01 to better bracket the expected readings. Other features include:

  • CPS Sleeve anti-clogging technology
  • GLP data for tracking calibration data
  • Ability to log and share data
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Halo pH Electrode

Halo Bluetooth Smart pH electrodes allow the ability to use a compatible Apple or Android device as a professional pH meter using the Hanna Lab App.


The HI10482 Halo pH electrode includes a built-in temperaturesensor for automatic temperature compensated measurementsand will automatically update the calibration buffer set to include pH 3.00 and 7.01 to better bracket the expected readings. Other features include:

  • CPS Sleeve anti-clogging technology
  • GLP data for tracking calibration data
  • Ability to log and share data
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Electrodes

HI1048 Wine Must pH Electrode

At the heart of every pH measurement is the pH electrode. There are many considerations that are used when designing a pH electrode for a specific application. With wine juice and must there is a high solids content that can lead to the clogging of the reference junction. The HI1048 wine pH electrode incorporates a PTFE sleeve that repels solids and is movable to clean the interface between the sample and the reference.

  • PTFE Sleeve Junction
  • Double Junction design
  • Refillable with 3.5M KCl
  • Glass body for fast thermo-equilibrium
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HI1048 Wine Must pH Electrode

At the heart of every pH measurement is the pH electrode. There are many considerations that are used when designing a pH electrode for a specific application. With wine juice and must there is a high solids content that can lead to the clogging of the reference junction. The HI1048 wine pH electrode incorporates a PTFE sleeve that repels solids and is movable to clean the interface between the sample and the reference.

  • PTFE Sleeve Junction
  • Double Junction design
  • Refillable with 3.5M KCl
  • Glass body for fast thermo-equilibrium
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HI1131 Glass Body pH Electrode

The HI1131 is a standard laboratory pH electrode that is commonly used on benchtop pH meters. The glass body is a good conduction of temperature allowing the reference cell to equilibrate with temperature of the sample . The HI1131 is a refillable pH electrode.

  • Glass body for fast thermo-equilibrium
  • Refillable with 3.5M KCl
  • Double Junction design
  • Ceramic junction
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HI1230 PEI Plastic Body pH electrode

The HI1230 is a rugged field pH electrode that is commonly used on portable pH meters. The chemically resistant plastic body protects protects this probe from accidental breakage. The HI1230 is gel filled so no refill solution is required.

  • PEI plastic unbreakable body
  • Maintenance free gel filled version
  • Double Junction design
  • Ceramic junction
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HI1230 PEI Plastic Body pH electrode

The HI1230 is a rugged field pH electrode that is commonly used on portable pH meters. The chemically resistant plastic body protects protects this probe from accidental breakage. The HI1230 is gel filled so no refill solution is required.

  • PEI plastic unbreakable body
  • Maintenance free gel filled version
  • Double Junction design
  • Ceramic junction
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Calibration Solutions

Technical pH Calibration Buffer

The 5000 series Technical pH calibration buffer offers an extensive range including pH 3.00. These buffers are NIST traceable and accurate to ±0.01 pH.


  • Wide range available
  • Accurate to ±0.01 pH
  • Supplied with a Certificate of Analysis (COA)
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Technical pH Calibration Buffer

The 5000 series Technical pH calibration buffer offers an extensive range including pH 3.00. These buffers are NIST traceable and accurate to ±0.01 pH.


  • Wide range available
  • Accurate to ±0.01 pH
  • Supplied with a Certificate of Analysis (COA)
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Standard pH Calibration Buffer

The 7000 series are basic pH calibration buffers. They include the standard pH 4.01, 7.01 and 10.01buffer values in addition to a pH 8.20 used for acidity end point determination. These buffers are NIST traceable and accurate to ±0.01 pH.

  • Accurate to ±0.01 pH
  • Available in variety of sizes
  • Available with color dye added for easy identification
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Maintenance Solutions

pH Electrode Refill Solutions

Maintaining a proper filling solution level in a refillable pH electrode is critical to obtaining accurate and reliable pH measurements. The solution not only provides an electrical pathway to the internal reference but maintaining an ideal level ensures there is adequate head pressure to ensure flow through the junction into the sample.


  • Solutions for both single and double junction electrodes
    • Single junction electrodes use 3.5 M KCl with silver chloride
    • Double junction electrodes use 3.5 M KCl
  • Available in a variety of sizes
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pH Electrode Refill Solutions

Maintaining a proper filling solution level in a refillable pH electrode is critical to obtaining accurate and reliable pH measurements. The solution not only provides an electrical pathway to the internal reference but maintaining an ideal level ensures there is adequate head pressure to ensure flow through the junction into the sample.


  • Solutions for both single and double junction electrodes
    • Single junction electrodes use 3.5 M KCl with silver chloride
    • Double junction electrodes use 3.5 M KCl
  • Available in a variety of sizes
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Cleaning Solutions

Maintaining a clean pH electrode is critical to obtaining accurate and reliable pH measurements. This especially true for Winemakers that measure pH in a grape juice sample that has a high content of solids from the skins and pulp of a crushed grape. Hanna offers specially formulated solution to clean the deposits and stains from a pH electrode.


  • Specially formulated to remove wines or stains
  • Available in 500 ml bottles or single use sachets
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Storage Solutions

All pH electrodes will have a hydrated layer from on the surface of the glass sensing membrane. Maintaining this hydrated is important from a calibration standpoint since the mV response is different from a dry electrode as compared to a hydrated one.

  • Specially formulated to keep the glass hydrated while minimizing organic growth
  • Keeps junction hydrated for fast response
  • Available in 230 and 500 ml bottles
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Storage Solutions

All pH electrodes will have a hydrated layer from on the surface of the glass sensing membrane. Maintaining this hydrated is important from a calibration standpoint since the mV response is different from a dry electrode as compared to a hydrated one.

  • Specially formulated to keep the glass hydrated while minimizing organic growth
  • Keeps junction hydrated for fast response
  • Available in 230 and 500 ml bottles
Shop Now >

Resources

Check out our Media Library and Knowledge Base pages specifically for wine and wine related products.