We've looked at the key questions you need to ask when choosing a new pH electrode, and put together a table highlighting some common applications and the best electrode for them!
pH Electrode Selection Table
If your sample type isn't listed on the selector table, or if you want to look at other options, just contact us to ask.
The right electrode is chosen based on two key areas - the sample and the connection.
Is the electrode right for the sample?
Of course there are thousands of possible samples, each of which may have special requirements of their own, but the most common "difficult" samples to watch out for are;
- Proteins = Double Junction required
- Heavy Metals or Cyanide = Double Junction
- TRIS buffers = Double Junction
- Viscous, oily or sticky liquids = Flat shape required
- Solid or semi-solid = Spear tip required
(If you want to know more about what those terms mean, take a look at our previous pH Electrodes Jargon Buster post)
Is the connection right for the meter?
TRUEscience meters accept any electrodes with a standard S7 connector - not just our own brand.
Other common connection types include BNC and DIN, though some manufacturers do make their own unique connector type. This can limit your electrode choices, so double check when purchasing a meter and make sure you can get a suitable probe for your samples.