RedOX probe for Micro Redox

Hello

Hello

I get back to you about the ORP-01-3-0098 probe that I bought

Here is the problem: I manage to calibrate it at 470mv with a buffer solution

then, with the 650mV buffer solution it gives approximately 620mv - not very well, but above all, it does not take good measurements in real conditions, ie with the pool water: gives 550mv instead of 690 for example: - (

First thing: if you connect the probe and you dip it in the 470 mV solution, can you read 470 mV on the device?

yes to the first thing - after calibrating the device, because it changes a bit from one probe to another

calibration with the device

So., It seems that the probe is measuring the value at 470 mv. In this case put the pool water in a glass and then look at the value measured by the device

it gives for example 550 instead of 690

How do you know it should be 550?

this should be 690 because I got another probe, which calibrates precisely on 470 and 650, and because it corresponds to the results of tests with strips

to see otherwise: we have 3 samples

buffer solutions 470 and 650, and swimming pool water

In do one thing: take our probe: put it in the solution at 470 mV, look at the value measure. then put the second probe and look at the value measure

ok i do that

Keep me posted .... Thank you

Ok, the probe is working perfectly

Thank you