pH meters need some care and attention. A little effort will keep a meter in good shape, ensuring accuracy and extending the meter's useful life. Probe Refill and Storage Solution can be used to store pH meters when not in use. Basically, the probe at the end of the meter should be just immersed in the solution. This will condition the probe and maximise its useful life. The same solution can be used for refilling the probes on certain meters.
Growth Technology - pH Probe Refill & Storage Solution - 300ml