Product Overview
VEGA VEGADIF 85 is a compact differential pressure transmitter designed for a wide range of industrial pressure measurement tasks. It measures the difference between two process pressures and can be used for level, flow, filter monitoring, density and interface measurement. The transmitter is suitable for liquids, gases and vapours and can be configured with threaded or flanged process connections according to the application.
Key Features
• Differential pressure measurement for liquids, gases and vapours
• Measuring range: -40 to +40 bar
• Accuracy: 0.065%
• Process temperature: -90 to +400 °C
• Process pressure: -1 to 400 bar
• Metallic measuring diaphragm
• Integrated overload diaphragm
• High-precision measurement of very low differential pressures
• Integrated absolute pressure measurement for multivariable applications
• Wetted parts available in 316L, Alloy C276, gold and Superduplex
• Threaded connection: ¼-18 NPT
• Flange connections from DN32 / 1⅜" depending on configuration
• 4–20 mA/HART output available
• PROFIBUS PA and FOUNDATION Fieldbus options
• Bluetooth configuration available
• IP66/IP67 or IP66/IP68 protection depending on configuration
• SIL2 qualification available
• Various ATEX, FM, IEC, CSA and other approval options depending on configuration
Suitable Applications
• Level measurement in pressurized vessels
• Flow measurement with primary flow elements
• Filter pressure monitoring
• Density measurement
• Interface measurement
• Differential pressure measurement of liquids
• Differential pressure measurement of gases
• Differential pressure measurement of vapours
• Reverse osmosis differential pressure measurement
• Industrial pressure measurement in demanding process environments
Selection Notes
The VEGADIF 85 is a configurable differential pressure transmitter, so the complete order configuration should be checked before replacement or quotation. Important selection factors include measuring range, process connection, wetted material, seal material, output signal, housing, temperature conditions and required approvals.
For high-temperature applications, chemical media or corrosive processes, the selected diaphragm, wetted material, seals and remote chemical seals should be matched to the actual process conditions. The transmitter supports several wetted materials and process connection options, but not every combination is available in every configuration.
For hazardous-area installations, SIL applications or marine applications, the required approval should also be confirmed against the specific order code rather than assuming that every VEGADIF 85 carries the same certification.
FAQ
What does the VEGA VEGADIF 85 measure?
VEGADIF 85 measures differential pressure and can be used for level, flow, filter, density and interface measurement.
What media can VEGADIF 85 measure?
It is designed for measurement of liquids, gases and vapours.
What is the pressure measuring range?
The current VEGA product page lists a measuring range of -40 to +40 bar.
What is the accuracy of VEGADIF 85?
The official product page lists an accuracy of 0.065%.
What is the maximum process temperature?
The listed process temperature range is -90 to +400 °C, depending on the selected configuration and application conditions.
What outputs are available?
Depending on the configuration, VEGADIF 85 is available with 4–20 mA/HART, PROFIBUS PA, FOUNDATION Fieldbus or 4–20 mA.
Can VEGADIF 85 measure absolute pressure as well?
Yes. VEGA describes the integrated absolute pressure measurement as a feature that allows the VEGADIF 85 to function as a multivariable sensor.
Does VEGADIF 85 have overload protection?
Yes. The transmitter has an integrated overload diaphragm designed to improve reliability.
Is VEGADIF 85 available with explosion protection?
Explosion protection and approvals such as ATEX, FM, IEC, CSA and UKEX are available depending on the selected configuration.
