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Instrumentation

Accurate pH Measurement Redefined!

 

Do you require accurate pH measurement? With the development of Russell Mainstream Supply's pH PLUS technology, past problems with accurate pH measurement such as long term drift, reproducibility and temperature errors have been virtually eliminated.

 

These highly sensitive pH & Reference Electrodes offer enhanced accuracy, very fast response and greater stability. The non Silver Reference system used in this range ensures better performance in samples prone to contamination from Silver Reference Systems.

 

 

Advantages of using pH PLUS:

  • 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 40C 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 @ 60C 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 @ 60C 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:

 

PP10 - Application: General Purposes

 

PP11 - Application: General Purposes

 

PP11-ROD - Application: General Purposes

 

PP12 - Application: Measurements in Flasks

 

PP13 - Application: Small Volumes

 

PP15 - Application: Low Conductivity Water

 

PP17 - Application: Measurement of Flat Surfaces

 

PP18 - Application: Soils and Slurries

 

PP19 - Application: Meat & Cheeses

 

PP21 - Application: Colloids and Slurries

 

PR1 -   Use with ISE's

 

SPECIFICATIONS :

 

Description

Stem Diameter

Junction Type

Temperature Range

Body Type

pH range

PP10

120 x 12

N/A

0 - 100oC

Glass

0-14

PP11

120 x 12

FRIT CERAMIC

0 - 100oC

Glass

0-14

PP11-ROD

120 x 12

ANNULAR

0 - 100oC

Glass

0-14

PP12

150 x 6

FRIT CERAMIC

0 - 100oC

Glass

0-14

PP13

90 x 4.5

FRIT CERAMIC

0 - 100oC

Glass

0-14

PP15

120 x 12

ANNULAR CERAMIC

0 - 50oC

Glass

0-10

PP17

120 x 12

POROUS TEFLON

0 - 90oC

Epoxy

0-14

PP18

120 x 12

ANNULAR CERAMIC

0 - 100oC

Glass

0-14

PP19

40 x 6

FRIT CERAMIC

0 - 100oC

Glass

0-14

PP21

120 x 12

GLASS SLEEVE

0 - 100oC

Glass

0-14

PR1

120 x 12

ANNULAR CERAMIC

0 - 100oC

Glass

N/A

 

Ordering information

For different connector types, just add the type of connector onto the description of the probe, for example:

PP11/1m/BNC

PP11/1m/DIN

PP11/1m/COAX

PP11/S7

 

Please specify cable length when ordering.

 

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R.M.S NEWS!!
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Russell Mainstream Supply Ltd.

 

Cameron House, 8 Crown Square, Kingskettle, Cupar, Fife, KY15 7PW

 

Phone: +44 (0)1337 831192

Fax: +44 (0)1337 371192

 

Email: Sales@rmprocesscontrol.co.uk 

 

  


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