Calibration Products Search for pH and Salinity: A Conversation with a Technical Advisor

Client:
I'm looking for pH and salinity

Technical Advisor:
Hello
Are you looking for a pH probe and a redox probe?

Client:
No, calibration solutions
For pH and salt

Technical Advisor:
What values?

Client:
I've had the devices for 20 years
pH 7 oo tds 940 ppm

Technical Advisor:
We only have pH 7
https://ph-redox-pool.com/gb/solution-etalonnage-tampon-piscine/617-solution-d-%C3%A9talonnage-tampon-ph7.html