Describe more than the fluid name
Provide principal components, concentration, contaminants, solids content and operating temperature and pressure. A trade name or 'mixed liquid' is insufficient for assessment. Include recipe changes and cleaning fluids. Identify whether the process is liquid, gas or may change phase.
Entrained gas is not a fixed correction
Gas bubbles in a liquid can affect the vibrating tube response and influence both mass-flow and density readings. Errors do not always act in one direction. A single calibration or universal correction factor cannot replace assessment. Record whether disturbances coincide with supply, tank-level or temperature/pressure changes, then ask an engineer to investigate.
Specify viscosity together with temperature
State viscosity value, units, associated temperature and expected variation. Independence from electrical conductivity does not remove the need to assess viscosity, pressure loss or gas content. For slurries or non-Newtonian fluids, provide solids proportion and flow behaviour so the supplier can check suitability.
- Identify outgassing, foaming, crystallisation or settling tendencies.
- Use data matching the actual conditions when estimating pressure loss.
Review every wetted component
Compatibility depends on composition, concentration, temperature and exposure conditions; 'stainless steel' alone is not enough. Review the measuring tube, connections, seals and any parts exposed during cleaning. Compatibility tables are reference information. Obtain confirmation for the actual fluid and configuration, and leave suitability unresolved when information is insufficient.
