If you are measuring CS Pro colloid, you may measure much lower as CS Pro units are designed to make a colloid, not a solution. Colloids are much less conductive than solutions. Other HVAC cs makers may make smaller particles (depending on the setup and the operator) and the conductivity readings will be much higher for the same ppm.
Better to use your tds to measure the water to start with, to make sure it is good. As some on the list will remind us from time to time, TDS meters do not tell you the ppm. Jim Michael Giammarino wrote: > Just got a TDS 1 with my CS pro unit. Some are using it to measure > the ppm of CS When I put it in a solution of CS, My numbers are coming > up low. Like about exactly the ppm measured before making the CS and I > can see the tyndall effect so I think there is more particles then > when I started what do you think? Mike
