Buffer powder 4/7/9
€4.90
-20% | €3.60 |
-15% | €3.83 |
-10% | €4.05 |
-7.5% | €4.16 |
-5% | €4.28 |
Pre-calibrated liquid essential for the periodic adjustment of your pH testers (every month or so).
Solution of 250ml. for more than 12 recalibrations.