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24th May 2022  Content supplied by: Thermo Fisher Scientific

Ensure the pH of Your Culture Media for Accurate and Reliable Results

In order to prepare culture media with optimum conditions to support consistent growth, it is essential to control several parameters.  These parameters are the key to reliable analyses and increased confidence in your results.

Controlling pH is of crucial importance to support consistent performance of your culture media once sterilised.  Choose Thermo Scientific™ Orion™ Meters and Thermo Scientific™ Orion™ ROSS™ Electrodes for improved stability and accuracy when testing over a wide range of temperatures.   

Thermo Scientific™ Orion Star™ pH Meters provide rich functionality and features for fast, accurate and reliable sample analysis.

  • Accurate, consistent results—day after day
  • Easy-to-use features that maximize productivity and minimize training time
  • Durable construction for dependable use and long product life
  • Modular meter designs for maximum configuration flexibility and functionality
  • A wide selection of benchtop and portable meters to meet your application requirements and budget
  • 3-year meter replacement warranty


Thermo Scientific Orion ROSS Electrodes
Reliable and accurate pH measurement is highly dependent upon both the design and manufactured quality of the pH electrode.  Of all the electrode features that influence the performance of pH probes, the reference element and the composition of the sensing glass are the most critical.

The unique reference chemistry of Orion ROSS electrodes is designed to deliver outstanding accuracy and trouble-free measurements.

Compared to conventional electrodes, the proven ROSS reference system exhibits stability in measurements, faster response, greater accuracy and precision when measuring samples that vary in temperature.

  • Stabilization to 0.01 pH units in less than 30 seconds when checking samples using pH 6.86 buffer that vary in temperature by 50ºC (25–75 ºC)
  • Measurement accuracy to ±0.03 pH units and precision to ±0.01 pH units using the same buffer and automatic temperature compensation

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Date Published: 24th May 2022

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