Corrosive and process chemical tank level with radar and compatible wetted materials
Acids, alkalis, solvents, and reactive process chemicals generate vapor, foam, and turbulence while attacking standard wetted parts. Ultrasonic faces degraded echo quality and seal failure; FMCW radar with chemically compatible materials keeps measurement stable and the transmitter protected.
Confirm the site problem, the Volivue approach, and the expected operating benefit before final selection.
Corrosive vapor and splash degrade ultrasonic transducer faces and standard process seals over time, causing measurement gaps, seal failures, and safety incidents that require frequent sensor replacement.
Use a Volivue FMCW radar transmitter with PTFE, PVDF, or compatible wetted antenna and seal selected from the medium name, concentration, temperature, and vapor load — non-contact measurement keeps the electronics isolated from corrosive conditions.
Stable, continuous level data on corrosive media with extended sensor life, reduced unplanned maintenance, and documented wetted-material compatibility for process safety review.
When the headspace attacks the instrument, start with radar
Acids, alkalis and reactive process chemicals are the clearest radar-first case in this family. Corrosive vapor attacks transducer faces and standard seals from above the liquid, foam and turbulence from dosing absorb acoustic energy, and many of these vessels are sealed or fume-extracted. An ultrasonic device here spends its whole life at the edge of its physics; an FMCW radar transmitter with compatible wetted materials does not.
Material selection is the heart of the review: PTFE or PVDF antenna and seal options are matched to the medium name, concentration and temperature, not guessed from a corrosion chart. Volivue documents that selection so process-safety reviewers can trace why each wetted part was approved — and ultrasonic stays available within the family for genuinely benign utility tanks on the same site.
Sealed process connections and signals that survive audits
The radar mounts on a flanged process connection with the antenna and gasket chosen for the medium; condensation on the antenna is tolerated by design, and a purge connection or extended nozzle handles heavy splash or crystallizing media. The mechanical fit is reviewed against agitators, dip pipes and spray balls so the radar beam sees liquid, not internals.
Outputs follow process-industry practice: 4-20 mA or HART to the DCS or PLC, relays for high-level interlocks, and RS485/Modbus where a chemical tank group reports into the Volivue dashboard. Commissioning includes an echo-curve review with internals in their working state, and the handover file carries wetted-material certificates and configuration records for management of change.
Four checks before planning a corrosive chemical tank
- Submit medium name, concentration and operating temperature — wetted materials are selected from data, not assumptions.
- State whether the vessel is sealed, fume-extracted or pressurized, and note any hazardous-area classification.
- Map internals such as agitators, dip pipes and spray balls against the radar beam before fixing the nozzle position.
- Define the interlock chain: which relay trips dosing or transfer, and how the trip is tested and recorded.
Our acid tank fumes heavily — will radar really read through it?
Yes. Microwave radar is essentially indifferent to vapor density, which is precisely why it replaces ultrasonic in corrosive service. The engineering effort goes into the wetted parts instead: antenna material, gasket and process connection are matched to the fume and splash chemistry so the transmitter survives as well as it measures.
The chemical crystallizes and coats everything — how is the antenna kept usable?
Crystallizing media are flagged during review: options include a PTFE-clad antenna geometry that sheds buildup, an extended nozzle that keeps the antenna out of the splash zone, or a purge connection. Inspection intervals are set from the medium behavior, and the echo curve makes coating visible before it becomes a measurement failure.
Five checks that decide ultrasonic or radar, mounting, conversion, and output scope.
Collect tank drawings and geometry
Confirm tank height, diameter, shape, nozzle size, mounting position, dead zone, and internal obstacles before any range claim.
Review medium and process conditions
Medium name, vapor, foam, turbulence, corrosion, temperature, pressure, and hazardous area decide whether ultrasonic or radar is reliable.
Select technology and package
Choose ultrasonic or radar, range, wetted material, process connection, seal, protection class, and accessories from the reviewed conditions.
Map usable outputs
Define 4-20mA, HART, relay, optional RS485/Modbus, PLC, dashboard, alarm, trend, or volume fields so the signal is useful after installation.
Commission and validate
Check scaling, empty/full references, tank conversion, alarm points, and trend behavior with site data.
Handover and remote support
Confirm documentation, operator training, spare parts, and a remote support path so the team can maintain scaling, alarms, and integration after commissioning.
Selection questions for engineers, procurement teams, and site maintenance.
When should radar be selected instead of ultrasonic?
Use radar when vapor, foam, temperature swings, pressure, corrosion, or high reliability requirements make ultrasonic echo unstable. Ultrasonic stays a good fit for clean, non-pressurized, cost-sensitive tanks.
Does the system measure weight?
No. It measures liquid level. Volume or percent fill is calculated from tank geometry or a strapping table; mass needs documented density assumptions.
Can it calculate tank volume?
Yes. Volume can be calculated when tank geometry, measurement range, and a strapping table or dimensions are available.
What media can it handle?
Water, wastewater, fuel, lubricants, chemicals, solvents, additives, and food-grade liquids, with technology and wetted material confirmed by review.
Can it connect to PLC or SCADA?
Yes, the project scope can include 4-20mA, HART, relay, optional RS485/Modbus, gateway, dashboard, or API integration.
Do you support hazardous area projects?
We can review hazardous-area requirements, but no ATEX, IECEx, SIL, or local compliance claim is made without verified product data and documentation.
What information should we send first?
Send the tank drawing, medium name, height, nozzle details, temperature, pressure, vapor or foam condition, required outputs, and site conditions.
What are the typical lead time and after-sales support?
Lead time depends on technology, range, wetted material, and order quantity, and is confirmed after application review. After-sales support covers documentation, commissioning guidance, spare parts, and remote help.
Send tank drawings, medium, temperature, and output target.
Share tank drawings, medium name, height, nozzle details, temperature, pressure, vapor or foam condition, output target, country or region, and hazardous-area need if any.