Availability
pH Solution & Electrodes
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Extech 6015WC Waterproof pH Electrode for Palm pH£51.00 £42.5042 Reward PointsPrice Match Guarantee6015WC -
Extech PH115 Replacement Refillable pH Electrode Module£52.08 £43.4043 Reward PointsPrice Match GuaranteePH115 -
Extech DO603 Membrane Kit for Dissolved Oxygen Meter£54.00 £45.0045 Reward PointsPrice Match GuaranteeDO603 -
Extech EC505 Replacement pH Electrode/Conductivity Cell Module£62.40 £52.00- Compatible with Extech EC500 Waterproof ExStik® II pH/ Conductivity Meter
- Measures conductivity, TDS, salinity, pH, and temperature
- Features a built-in Pt-100Ω sensor
52 Reward PointsPrice Match GuaranteeEC505 -
Extech CL205 Replacement Chlorine Electrode Module£78.00 £65.0065 Reward PointsPrice Match GuaranteeCL205 -
Extech EX050 16ft Extension Cable with Probe Guard/Weight£91.79 £76.4976 Reward PointsPrice Match GuaranteeEX050 -
Extech CL204 ExTab Chlorine Reagent Tablets (100pk, 1000 Tests)£118.80 £99.0099 Reward PointsPrice Match GuaranteeCL204 -
Extech 601100 Flat Surface Electrode (15 x 106mm)
£148.80 £124.00124 Reward PointsPrice Match Guarantee601100 -
Extech DO605 Replacement Dissolved Oxygen Module£149.40 £124.50124 Reward PointsPrice Match GuaranteeDO605 -
Extech 67500B Redox ORP/REF Electrode (13 x 154mm)£154.80 £129.00- Compatible with a number of ORP meters
- Fast response time
- Includes a 1m cable with BNC connection and a storage solution bottle
129 Reward PointsPrice Match Guarantee67500B -
Extech DO705 Dissolved Oxygen Electrode£230.40 £192.00192 Reward PointsPrice Match GuaranteeDO705
About pH Solution & Electrodes
When using a pH meter it is incredibly important to maintain the device's electrode via the use of buffer solutions. Not doing so will lead to the efficiency of the electrode deteriorating at a much quicker rate, leading to it having to be replaced more often.
It is also common practice to perform pH meter calibration before each testing procedure - this enables the user to check that the electrode is functioning correctly and that the result gained during the real testing procedure will be accurate. Not doing so can be a significant danger, as an incorrect reading taken using an uncalibrated could leave the target substance with high acid/alkali levels that shouldn't be present.
Sample pH solutions are used commonly during these calibration procedures to check that the tester is working correctly. Before this is done the probe of the pH meter should be thoroughly rinsed using a special rinse solution, and then it should be immersed into the sample solution, stirring gently to create a homogenous sample. The reading should then be accurate to the solution used and if so, the meter is calibrated correctly.
Sample pH solutions are often referred to as buffer solutions, and they are designed to resist sudden changes in pH, making them perfect for calibration purposes. The buffer solution can differ in pH, so choosing the right one for your testing needs is important. There are also buffer solutions created for specific pH types, such as chlorine.
It is also good practice to rinse electrodes before testing actual solutions as well - not doing so could lead to contamination and inaccurate readings being taken.
