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I have bought this Analog Ph Sensor today, and one of the cautions the designer has left was:

"After completing the measurement, disconnect the pH probe from the signal conversion board. The pH probe should not be connected to the signal conversion board without the power supply for a long time."

So does this literally mean I must physically disconnect the probe, or will it be ok to have a timer circuit that flicks a switch to off that I would program based on the sensor's response time?

Unfortunately I'm sorry if this is an obvious one to many, I really haven't taken proper consideration of electronics before.

  • why are you not asking the designer? – jsotola Sep 20 at 4:13
  • On the linked site this is not clear, but I guess this is voltage/current issue, meaning that you have to cut the voltage from the probe. A MOSFET or such might mess with your measurements, but you can cut the voltage with a relay. – chrisl Sep 20 at 10:08
  • @jsotola fair point but I guess im just more accustomed to making an idiot of myself here than 1 on 1 in an email that's brutal – Adam Sep 20 at 12:10
  • ok thanks @chrisl thanks along the lines of what I was hoping it's just that I have temperature sensors I planned to control with a mega and I ideally don't want to have to reach around and physically unplug the probe theoretically I don't see why it needs to be physically disconnected but yeah I am no where near an expert yet so I had to ask – Adam Sep 20 at 12:13

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