# Process water

Coolant concentration by refractometer and apparent Brix, coolant pH and temperature compensation, rinse-water conductivity, dissolved solids, hardness, carryover, counterflow and reverse osmosis.

[Manufacturing Wiki](https://planar.so/wiki/index.md)

- [Conductivity of rinse water](https://planar.so/wiki/chemicals/process-water/conductivity-of-rinse-water.md): Conductivity, resistivity, temperature compensation, and the limits of interpreting a rinse-water measurement.
- [Coolant concentration refractometry](https://planar.so/wiki/chemicals/process-water/coolant-concentration-refractometry.md): Refractive index, apparent Brix, product-specific coolant factors, temperature compensation, calibration, and the limits of concentration estimates in used fluids.
- [Coolant pH measurement](https://planar.so/wiki/chemicals/process-water/coolant-ph-measurement.md): Hydrogen-ion activity in water-containing metalworking coolants, measurement bases, temperature effects, and the limits of pH as a condition indicator.
- [Counterflow rinsing](https://planar.so/wiki/chemicals/process-water/counterflow-rinsing.md): Countercurrent rinse-water flow, dragout transfer, related rinse arrangements, and the limits of concentration-based interpretation.
- [Dissolved solids in process water](https://planar.so/wiki/chemicals/process-water/dissolved-solids-in-process-water.md): Dissolved-solids terminology, residue and conductivity measurement bases, concentration units, and limits of interpretation for manufacturing water.
- [Reverse-osmosis process water](https://planar.so/wiki/chemicals/process-water/reverse-osmosis-process-water.md): RO feed, permeate and concentrate; recovery, solute rejection, driving pressure and the limits of interpreting process-water quality.
- [Rinse-water carryover](https://planar.so/wiki/chemicals/process-water/rinse-water-carryover.md): Liquid carryover between wet-process stages, retained films and trapped liquid, and the volume and mass bases of conditional balances.
- [Water hardness in process fluids](https://planar.so/wiki/chemicals/process-water/water-hardness-in-process-fluids.md): Calcium and magnesium hardness, reporting bases, alkalinity distinctions, and limits of measurement in formulated process fluids.