Used ORP probe

[jasonrusso]

I bought a used apex last year. The seller included an ORP probe which I never used. The solution he shipped it in dried up. Can I use a kit like this then a calibration or is it a goner? I'm using it on a nitrate reactor so it will be reading negative.

https://www.amazon.com/gp/aw/d/B007Z4DW7W/ref=cm_cr_arp_mb_bdcrb_top?ie=UTF8

 

[geddavis]

you could try however the apex orp probe is an ISE probe or IOn Selective Electrode and they heavily rely on staying in their proper solution. like I said you could try, however, I strongly advise not to trust anything it says or do any actions based on its readings. I would try buying some storage solution for it to try and rehydrate it. then test orp every day or so for a week to see if it stays working and accurate. if you want to run equipment off of it then id just buy a new one.

 

[jasonrusso]

One night in 4.01 pH buffer, than overnight in the shipping solution (from a new Milwaukee probe), it reads 395 in the 400 calibration solution.