Total Dissolved Solids

Definition

Total Dissolved Solids such as inhibitor chemicals, silicates, contaminants and water hardness compounds can lead to water pump failure. TDS levels should not exceed 6000 ppm.

Standard Test Method Used

POLARIS Method - Conductivity/TDS Meter Measurement

Reporting Measurement

ppm (parts per million)

Amount of Sample Needed

50 mL

Test Limitation

Overly concentrated in-service coolants will give false readings. Petroleum contamination can affect results.