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this device automatically switches off the pump
000 litres (4
simply dip the sensor into the water and read the result
Add 5 drops of NO3-2 test fluid and shake again
Hanna pH Liquid 7.0 & 4.0 Testers this device automatically switches offThe pH 4. 01 & 7. 01 buffer solutions in quick and easy to use 20ml sachets are the most popular buffers used before analysing samples. Ideal for those requiring an accurate acid or neutral reading. The single dose sachets are really handy with each sealed sachet holding just the right amount of solution. Each time a meter or electrode is calibrated using the Hanna sachets, it is like using a newly opened bottle of solution. 5 x 20ml sachets of pH 4.
