Thermo Scientific™ Orion™ Ross™ pH Electrodes

The Best Choice for Superior Stability, Rapid Response, Accurate and Reproducible pH Measurements.

Orion Ross electrode epoxy body

ROSS pH Electrodes offer unmatched benefits that you will not find in any other pH electrode.

For more than 35 years, ROSS pH electrodes have been providing the best accuracy, stability and response you will find in a pH electrode.

Before selecting an electrode, consider the advantages you will have if you choose a ROSS electrode:

Rapid Response and Superior Stability

Compared to conventional electrodes, the proven ROSS reference system exhibits superior stability in measurements, faster response, greater accuracy and precision when measuring samples that vary in temperature or when calibrating in temperatures that differ from your samples.

ROSS electrodes are much more stable over time and avoid the long term drift that other electrodes exhibit (ROSS electrodes drift by less than 0.002 pH per day) so recalibration is minimised.

No Sample Contamination

Standard silver chloride electrodes leach metal into the fill solution and eventually into the sample, which causes sluggish response or inaccurate readings while also reducing electrode life. ROSS electrodes do not contain any silver or mercury to react with the sample or to clog the electrode junction. ROSS pH electrodes can be used in samples such as biological media, foodstuffs and pharmaceuticals where trace amount of metals cannot be tolerated.

Double Junction Design

This design allows you more control over an important variable. In order to minimise errors caused by junction potential, you can use a solution that is similar to the sample. The user also has the ability to change filling solutions to minimise contamination when potassium or chloride in the sample, are undesirable.


ROSS electrodes have two main families to choose from.

Each family has a variety of electrode options to choose from to ensure you have the correct electrode for your measurement needs and all contain the advantages mentioned previously.


Diagram explaining different Bulb Shapes


Graph shoowing Ross Electrodes versus other conventional pH electrodes

 

Temperature Response

Most ROSS electrodes have a temperature range of 0 to 100°C and show rapid response and stability even when measuring samples that differ by as much as 50°C. The readings are much more accurate than standard electrodes in samples with extreme temperature variations. ROSS electrodes provide the correct reading within 30 seconds, while standard electrodes are still trying to equilibrate and provide the correct reading after 3 minutes! The graph on the left illustrates this response.