重新導向訊息
詢價
pH計 / 離子計、溶氧量及電導度計

pH計 / 離子計、溶氧量及電導度計

查詢適合您應用的 pH、離子、氧氣 ( DO ) 或電導度計。我們的產品組合包括從基本儀器到定制系統的高端模組的所有內容。

產品系列 知識中心 常見問答

無論您有什麼要求 – 我們都有適合您的儀器

我們的儀器產品系列可確保可靠的 pH、電導度、溶氧量和離子測量。使用篩選來選擇您的搜尋並找到最適合您的儀器。

尋找 pH / 離子/ 電導度量測的應用

pH計 / 離子計、溶氧量及電導度計 – 常見問答

When selecting a pH meter, prioritize accuracy and precision based on your specific application. Key features to look for include:

  • Calibration: Opt for easy calibration with automatic buffer recognition. Multi-point calibration is ideal for ensuring reliable results.
  • Portability vs. Benchtop: Choose a portable meter for field use (e.g., water or soil testing) or a benchtop model for advanced laboratory analysis.
  • Electrode: Ensure the availability and quality of electrodes for specific samples, such as food, wastewater, non-aqueous samples.
  • Measurement range & temperature compensation: Confirm the pH range meets your needs and that the device includes Automatic Temperature Compensation (ATC) for accuracy under varying conditions.
  • Durability: Go for durable, waterproof designs (e.g., IP67-rated) for fieldwork or robust benchtop units for lab use.

 

  • User experience: Look for user-friendly features like clear displays, data logging, or connectivity.
  • Multi-parameter capabilities: If needed, consider meters that also measure conductivity, dissolved oxygen (DO), or other parameters – especially useful for environmental monitoring.
  • Maintenance & accessories: Check for availability of storage solutions (e.g., KCl solution, buffers) and replacement electrodes.
  • Warranty: Choose a reputable brand for long-term reliability. At Metrohm, every instrument comes with a 3-year warranty for lasting confidence.

 

Contact us if you have any questions

 

Proper calibration ensures accurate pH measurements.

Note:

  1. Always use fresh buffer solutions that cover the pH value of your sample.
  2. Rinse the electrode between buffers.
  3. Carry out the pH calibration at the same temperature at which you measure your samples.

Learn more in our blog article:

How to calibrate a pH meter

pH is a temperature-depended measurement. This means the sample’s temperature directly affects the accuracy of the reading. A correct pH measurement always includes the temperature of the sample.

For precise calibration, temperature must be factored into the calculation. Modern pH meters use electrodes with built-in temperature sensors, which automatically perform this compensation.

For trouble-free pH measurements, it is best to use a combined pH electrode with a built-in PT1000, as this is the industry standard.

Learn more in our blog:

Blog: How temperature influences the pH value

Yes, Metrohm offers combined meters to measure pH and conductivity simultaneously.

Go to Portable Meters

For pharmaceutical applications, we recommend a benchtop pH meter with the following features:

  • High-precision pH meter with high accuracy, multi-point calibration
  • Compliance with regulations such as FDA 21 CFR Part 11
  • Smart electrodes that store calibration data and can be integrated into laboratory software to ensure the traceability and stability of pH-sensitive drug formulations
  • Support ion-selective measurements for complex analyses
  • Robust design with replaceable glass electrodes for handling aggressive chemicals.

Metrohm's high-end laboratory modules are well suited for these requirements due to their precision and customization options. Depending on your needs, you can use a stand-alone compliant instrument , for instance, the 856 Conductivity module or the 867 pH Module with a 900 Touch Control. If you prefer a software-controlled solution, combine the modules with OMNIS.

Flyer: Electrodes for pH measurements - Which electrode for which application?

Yes, use a pH meter with an electrode that is optimized for viscous samples like the Viscotrode. Clean the electrode with specialized solutions to avoid contamination and guarantee a continuous, even electrolyte outflow.

Flyer: Electrodes for pH measurements - Which electrode for which application?

A portable meter with spear-head electrode is ideal for yogurt, ensuring accurate measurement in semi-solids. Automatic Temperature Compensation (ATC) and ±0.01 pH accuracy are essential for consistent quality control during fermentation. Look for maintenance-free electrodes such as gel electrodes with optimized diaphragms to prevent diaphragma blockage.

Metrohm’s portable meter with the maintenance-free spear-head electrode is an excellent choice for this task:

Go to Portable Meters

Flyer: Electrodes for pH measurements - Which electrode for which application?

For environmental water testing, choose a pH meter with the following key features:

  • Portability: Essential for fieldwork in rivers, lakes, or wastewater sites
  • IP67-rated protection: Ensures the device is waterproof and dust-resistant
  • High accuracy: Look for ±0.01 pH resolution for reliable measurements
  • Automatic Temperature Compensation (ATC): Adjusts readings based on sample temperature for precision
  • Multi-parameter capabilities: Useful if you also need to measure conductivity, dissolved oxygen (DO), or other parameters
  • Durable electrodes: Designed to withstand harsh environmental conditions
  • Data logging: Enables tracking and storing measurements over time.

Metrohm’s portable meters with robust probes and data storage are ideal for measurements in rivers or wastewater.

Go to Portable Meters

Blog: How to calibrate a pH meter

Choose a portable pH meter with a Profitrode or equivalent electrode, offering ±0.01 pH accuracy and Automatic Temperature Compensation (ATC), designed for sulfide-rich wastewater. A rugged, IP67-rated model with replaceable electrodes ensures durability in harsh environmental conditions.

Use a portable pH meter with a rugged electrode and ±0.01 pH accuracy, designed for low-ionic samples like rainwater. Automatic Temperature Compensation (ATC) helps adjust for outdoor conditions. A pH electrode like the Aquatrode is ideal for this task

Go to Portable Meters

For soil testing, select a portable or benchtop pH meter, depending on if you bring the sampe to the lab or measure it directly in the field.

A Unitrode with PT1000 is an ideal partner for this task. Rugged, IP67-rated designs ensure durability in the field. Metrohm’s portable meters with Unitrode are reliable for agricultural use.

Go to Portable Meters

Flyer: Electrodes for pH measurements - Which electrode for which application?

Select a portable or benchtop pH meter with a flat-membrane electrode for skin surface measurement, offering a pH accuracy of ±0.1 pH and Automatic Temperature Compensation (ATC).

Flyer: Electrodes for pH measurements - Which electrode for which application?

Use a benchtop pH meter with a flat-membrane electrode (e.g., suitable for surface measurements) and ±0.01 pH accuracy for creams or lotions. Automatic Temperature Compensation (ATC) ensures precision in the results. Look for FDA-compliant models if required.

A high-end lab meter such as the 867 pH Module with 900 Touch Control is ideal for quality control of cosmetics.

Choose a rugged, portable or benchtop pH meter with a Unitrode or similar electrode designed for acidic conditions and ±0.01 pH accuracy. Ensure it has Automatic Temperature Compensation (ATC) and a durable, replaceable electrode to withstand harsh chemicals. Multi-parameter support (e.g., conductivity) can help monitor bath stability in industrial settings.

Flyer: Electrodes for pH measurements - Which electrode for which application?

Go for a pH meter with a Biotrode or equivalent electrode, offering ±0.01 pH accuracy and Automatic Temperature Compensation (ATC) for protein solutions. A benchtop model with multi-point calibration and data storage is best for lab research, ensuring stability in complex biological samples like serums or infusions.

Flyer: Electrodes for pH measurements - Which electrode for which application?

Use a portable pH meter with a Profitrode or equivalent electrode, offering ±0.01 pH accuracy and Automatic Temperature Compensation (ATC) for bleaching or dye baths. A durable design with chemical-resistant electrodes is key for textile processing, especially with high-pH solutions.

pH 值測量：從 A 到 Z 的所有內容

點此下載

本專刊總結了有關 pH 值測量的所有知識，包括最佳實踐和範例。