Cleaning probes and calibration

[Trueblackpercula]

How often do my ph redox temp and conductivity probes need to be cleaned and calibrated

[diverdutch]

I periodically clean the probes and calibrate at the same time .... I renew the calibration liquids every year.

[Antipodes]

Clean and recalibrate probes approx every 6 - 8 weeks.