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Buyer planning tool
Prepare a complete tank or silo measurement brief before comparing radar, ultrasonic, capacitive, or connected level sensor quotations.
A vessel drawing, nozzle photo, process datasheet, existing instrument record, or control-system interface description can reduce selection assumptions. Ask the supplier to return the proposed model, open questions, exclusions, and document revision in writing.
Identify the installation and the commercial scope that suppliers must quote.
Company, project, plant, contact, role, and installation country
Application and measurement purpose
New installation, replacement, retrofit, or temporary measurement
Sample quantity, first-order quantity, annual demand, and required delivery date
Describe what is measured and the geometry around the measurement path.
Medium name and type: liquid, slurry, powder, or granular solid
Density, bulk density, conductivity, viscosity, foam, vapor, dust, or condensation when relevant
Tank, silo, open channel, or other vessel; vessel height and required measuring range
Minimum and maximum level, nozzle size, mounting position, and available clearance
Internal obstructions, ladders, coils, agitators, filling streams, or moving equipment
Record normal and worst-case conditions that can affect the sensing technology.
Minimum, normal, and maximum process temperature
Minimum, normal, and maximum pressure, vacuum, or pressure cycling
Corrosive, abrasive, sanitary, outdoor, washdown, vibration, or submersion conditions
Hazardous-area classification, protection concept, and gas or dust group when applicable
Define the required result and how the device connects to the process and control system.
Preferred technology: radar, ultrasonic, capacitive, connected, or open to recommendation
Accuracy, repeatability, response, dead zone, and blanking-distance requirements
Output and communications: 4-20 mA, HART, RS485, Modbus, relay, or another interface
Supply voltage, local display, remote adjustment, enclosure, ingress protection, cable, and connector
Process connection, wetted material, mounting adapter, and required manual language
Use the same evidence request and acceptance criteria for every shortlisted supplier.
Current model datasheet, dimensional drawing, wiring diagram, and installation manual
Calibration certificate, inspection report, test record, and serial-number traceability when required
Declaration or hazardous-area documentation with the exact quoted model scope when applicable
Sample inspection, factory acceptance test, site test, commissioning, and customer acceptance criteria
Required records, document language, revision control, and approval milestones
RadarEvaluate when vapor, dust, foam, pressure, temperature, range, or narrow beam geometry makes the application difficult. Confirm mounting and the exact quoted document scope.
UltrasonicConsider for suitable non-contact applications after checking vapor, foam, condensation, temperature, pressure, range, blanking distance, and mounting conditions.
CapacitiveConsider contact measurement after confirming medium properties, buildup, vessel material, probe arrangement, process connection, and wetted-material compatibility.
These are screening questions. Confirm final model, configuration, performance, certification scope, availability, and commercial terms in the current controlled documents and quotation.