• Quick calibration - response time in pH Buffers is remarkable: time taken to respond to pH change 7 to 4 Buffer = under 15 seconds (standard AgCl can take over a minute). See Below: 

   

  

  
   

   

   

   

  
   
• Faster measurements - pH PLUS electrodes reach equilibrium in samples significantly faster than conventional electrodes, especially when there is temperature variation: stabilisation time with a 40°C shift in temperature in pH 4 Buffer = under 15 seconds (conventional AgCl can take up to 5 minutes).
   
• Drift - Long term drift on pH PLUS is greatly reduced, therefore the need for frequent re-calibration is virtually eliminated (in tests over a period of 90 days the pH PLUS electrode drifted by only 2mV in pH 7 Buffer, whereas a conventional AgCl drifted by over 6mV)  See below:

  

   

• Reproducibility: The pH PLUS electrode displays unsurpassed reproducibility when returned to the original sample after being exposed to extreme conditions of pH and temperature: after being immersed in pH 4 Buffer @ 60°C for 4 minutes the mV reading was -4mV, subsequently the probe was introduced to pH 7 Buffer @ room temperature the mV variation was found to be -5mV (i.e within 1mV) The same experiment was carried out using a conventional AgCl probe and gave the following results: pH 4 Buffer @ 60°C for 4 minutes  =  -2mV, placed in pH 7 Buffer @ room temperature the mV variation was -6mV (i.e approx. 4mV variation) See Below:

  

   

• Linearity: pH Electrodes of all types show good linearity over the pH range 2-12. pH PLUS assists the user to make reliable measurements as there is no temperature hysterisis (of memory) effect caused by variations in temperature. So results are achieved in seconds rather than minutes.

Not only is time saved by rapid equilibration but accuracy and confidence in the result allows use of pH PLUS probes in a wide variety of samples without recalibration. Fast response and excellent reproducibility will also facilitate accurate results from unskilled operators, once drift and uncertainty of response have been eliminated.

The following probes are available: