Pressure transmitter selection for chemical storage tanks should consider chemical compatibility, tank pressure, level or pressure purpose, connection type, and safety requirements. Chemical tanks may store acids, alkalis, solvents, wastewater, additives, or mixed liquids, so material selection is often more important than the pressure range itself.
The first question is whether the transmitter measures tank pressure or liquid level. These are different applications and may need different transmitter structures.
Pressure or Level Measurement?
If the transmitter measures gas pressure inside the tank, a pressure transmitter may be used. If it measures liquid level by hydrostatic pressure, the liquid density, measuring height, and tank pressure condition must be considered.
For closed tanks, top pressure may affect level measurement. In that case, a differential pressure level transmitter or dual flange DP level solution may be needed.
Chemical Compatibility
Chemical compatibility should be checked before quotation. Buyers should provide chemical name, concentration, temperature, and whether the liquid contains chloride, fluoride, solids, or mixed components.
For corrosive chemicals, the supplier may consider:
- Special diaphragm material
- PTFE-lined structure
- Diaphragm seal transmitter
- Suitable gasket or seal material
- Flange material compatible with the medium
Only checking the diaphragm material may not be enough. The flange, gasket, and connection may also contact the chemical.
Installation and Safety
Chemical tanks may require safe maintenance, isolation valves, diaphragm seals, or remote mounting. If the tank is outdoors, weather protection and cable sealing also matter. If the area is hazardous, explosion-proof requirements should be confirmed early.
Conclusion
Pressure transmitter selection for chemical storage tanks depends on whether the application is pressure or level measurement, and whether the chemical is corrosive, hot, dirty, or pressurized.
SIY Electric can help select pressure, diaphragm seal, and DP level transmitters for chemical storage tanks according to medium, density, temperature, flange, and safety requirements.
