How long do the sensors last?

Approximately 12 to 18 months, but it really depends on the care taken, if used for hydroponics or water based samples we have seen these kinds of times and even more, in some cases where the probe has been used as a sort of laboratory service doing 400 samples a month or so, some of the sensors sensitivity reduced after about 8 months at that level.

What happens then? simply order a replacement sensor tip, they are colour coded, we will send out the replacement tip straight away, it is very simple then for you to take out the old sensor with a thin pliers or tweezers, pop it out, pop in the new one and away you go.