neptune ph vs pinpoint ph meter differences

[arafas]

Hello,

I just got a neptune system and calibrated and set it up. My question I have one of those pinpoint ph meters with new probe and calibrated recently. Pinpoints shows around 3.95-8.0 during peak and my petune shows around 7.75-7.8 during peak. Pinpoint i use cal fluid 4 and 7 vs neptune 7 and 10. What you guys recommend test them with same cal solution. I used there branded cal fluids.

 

[blaxsun]

I assume the "3.95" is a typo? (maybe 7.95?) I just ran a pH test with my Hanna checker, calibrated my Neptune pH using the 7.00/10.00 packets and compared. It was within 0.01-0.02 (close enough for me).

 

[arafas]

Yes sorry 7.95. I have only those 2 so was questioning. My buddy has the milwaukee but Ph Metter has been out of the water for a while so I assume no good.

 

[arafas]

bump

 

[blaxsun]

Yes sorry 7.95. I have only those 2 so was questioning. My buddy has the milwaukee but Ph Metter has been out of the water for a while so I assume no good.

There's always going to be a margin of error; 7.75 compared to 7.95 is a bit out of that range, so yeah - you could try calibrating both with the same solution and see what (if any) difference there is.