. If you have any questions, please let us know.

what is the difference between ref. 1-3-0177 and ref. 1-3-3213

Good morning

The 1-3-0177 is 120 mm (Transparent part) and the 1-3-3213 is 80 mm

and the 120mm one is compatible with the Simpool PH I think?

Yes !

Thank you

You are welcome, do not hesitate to contact us! Good evening

one more question: can we install the new sensor directly or do we have to calibrate it again?

It is preferable to do the calibration because it depends on the probe and the device.

the simpool manual says to use a ph7.3 standard. do

Does that exist?

No, 7.3 is the set value. for the calibration of the simpool you need pH7 and pH4: https://ph-redox-pool.com/gb/pool-buffer-calibration-solution/1640-ph4-ph7-calibration-kit.html

It's still an old model of simpool, not digital, and the manual adjustment with button ranges from 6.5 to 8.0

Have you done the calibration yet?

Never, because I just bought the house

and I see that the consumption of PH- is quite high

Yes, it also needs to be calibrated. The knob is for setting the set value