What is the upper limit of sodium and fluoride levels that a TSS sc sensor can withstand?

Document ID

Document ID TE2011

Published Date

Published Date 27/05/2017
Question
What is the upper limit of sodium and fluoride levels that a TSS sc sensor can withstand?
Summary
TSS sc Sensor Specifications
Answer
The maximum chloride concentration is 500 mg/L, which corresponds to 0.8 g/L NaCl, so 1 g/L is a good rule of thumb. From a general list in chemical resistance, it is found that sodium fluoride and potassium bifluoride does not cause corrosion, whereas aluminum and ammonium fluoride are corrosive. Usually the corrosion also depends on temperature and pH, so it is difficult to provide a general recommendation. If high salt concentration is an issue, perhaps Titanium sensor could be an alternative. Here is the material list for the TSS sc sensor. It will be important to check components for material compatibility.

Head: 1.4460
Sleeve, shaft, shank: 1.4571
Sapphire glass
Gasket: FKM
Wiper: PA