Lab Grade pH probe

[John Neuzil]

https://atlas-scientific.com/probes/ph-probe/

Just installed this pH probe to replace my pinpoint probe. The new probe reading is bouncing around like crazy and won't settle on a reading. Did I get a bad probe?

 

[Danny]

Did you hit the clear button on the calibration tiles after replacing the probe? Not sure you would want to calibrate it yet if it is new.

 

[John Neuzil]

Did you hit the clear button on the calibration tiles after replacing the probe? Not sure you would want to calibrate it yet if it is new.

I didn't. I just figured what the heck and did a recalibration

 

[Danny]

Ok, so you did recalibrate. It may be some kind of interference. What does it do if you place some tank water in a cup or glass and place the probe there does it still bounce around or is it stable.

 

[John Neuzil]

The same. Still all over the place.

 

[Danny]

is the pH probe cable with any other cables that could interfere with the probe. You can also try the old probe to make sure it is stable also. Does that probe require an adapter to BNC? If it does you might try reseating it.

 

[John Neuzil]

Thanks Danny, tried all that. Cable is not near any other. There I'd an adapter and its tight.

 

[John Neuzil]

Update. Just got off the phone with Atlas Scientific. Apparently it's a common problem with the lab grade probes being shipped in the winter and they freeze. They are going to take care of it for me.

 

[Danny]

Nice to know. I will not order in winter then.