Varec Hydrostatic Tank Gauges

A single pressure measurement requires a manually entered product density. Additional pressure measurements can support calculated density and vapor-pressure compensation.

Liquid level, volume, and density are derived values rather than direct measurements in a hydrostatic tank gauging system.

Key Characteristics

• Mass-based tank gauging using hydrostatic pressure measurement
• Configurable with up to three pressure transmitters and one or more temperature elements
• Integration of compatible HART® pressure and temperature instrumentation
• Tank-side processing of pressure, temperature, and configuration data
• Support for transferring measurement and calculated inventory data to a control-room system
• Use of tank strapping-table data within configured inventory calculations
• Configuration-dependent calculation of product density, liquid level, volume, and mass

Ideal Applications

• Measuring tank inventory when product quantities are accounted for by mass or weight
• Integrating pressure and product-temperature measurements at the tank side
• Calculating product density using multiple pressure measurements
• Accounting for vapor pressure within configured hydrostatic calculations
• Transferring hydrostatic tank measurement data to a control-room inventory system
• Bulk storage applications where hydrostatic measurement is selected for petroleum or viscous products

Product Family Includes

• NRF81 Tank side Monitor
• Prothermo NMT532, and NMT539 Average Temperature Converters
• Compatible HART® pressure transmitters
• Compatible spot or average temperature devices
• 4590 Tank side Monitor — discontinued legacy component referenced in the hydrostatic solution documentation

Industries Served

• Oil and Gas
• Petroleum
• Refining
• Petrochemical
• Bulk Liquid Storage

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