VEGA VEGADIF 85 Differential Pressure Transmitter

Universal pressure transmitter with metallic ceramic measuring cell for measuring gases, vapors and liquids up to 400°C.

Starting at $2,263.00
Effective October 1st, 2025 VEGA has added a 9% surcharge for all of their products. The surcharge will appear as a separate line item on the order.

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Product Manual Product Specs (2 Files)

Features

  • Metallic measuring diaphragm cell with oil-filled piezoresistive (semiconductor) sensor element
  • 0.145 to +580psig (0.01 to 40 bar / 1 to 4000 kPa) measuring range
  • 0.015 psig (1 mbar/100Pa) smallest adjustable span
  • <0.065% deviation
  • 4-20 mA/HART output signal (Profibus PA, Foundation Fieldbus, and Modbus versions also available)
  • ¼-18 NPT per IEC 61518 process fitting, basic version
  • -40 to 225°F (-40 to 105°C) process temperature, basic version
  • -40 to 752°F (-40 to 400°C) process temperature with chemical seals
  • -1 to 400 bar / -100 to 40000 kPa (-14.5 to 5800 psig) process pressure
  • -40 to 176°F (-40 to 80°C) ambient, storage, and transport temperature
  • 11 to 35VDC operating voltage
  • Bluetooth wireless setup and diagnostics via smartphone/tablet or PC with PACTware
  • Up to IP68 (25 bar)/IP69K protection rating

The VEGA VEGADIF 85 Differential Pressure Transmitter is a 4 to 20 mA/HART two-wire instrument used for measurement of liquids, gases, and vapors. Typical applications include level measurement in pressurized vessels, flow measurement in combination with differential pressure flow elements, pressure monitoring on filters, and density or interface measurement. The metallic measuring cell acts as the sensor element: process pressures are transmitted via separating diaphragms and an oil filling to a piezoresistive sensor element. The difference between the acting pressures changes the bridge voltage, which is measured, processed, and converted into a corresponding output signal; measuring cell temperature and static pressure on the low-pressure side are also measured and available as additional output signals.

The VEGADIF 85 supports local measurement display and on-site adjustment via the optional PLICSCOM display and adjustment module, or remotely via a PC running PACTware with the corresponding DTM. A Bluetooth version enables wireless connection to smartphones and tablets (iOS/Android) or a PC with PACTware and a Bluetooth USB adapter. Adjustment via remote systems is also possible using a HART Communicator or manufacturer-specific programs such as AMS or PDM. Beyond standard 4 to 20 mA and 4 to 20 mA/HART electronics, purely digital versions supporting Profibus PA, Foundation Fieldbus, and Modbus are available upon request. Double-chamber housing versions can also carry supplementary electronics such as a radio module, a second current output, or a power pack.

Process flanges are made of stainless steel 316L and Alloy 276, with the process diaphragm available in 316L as well as high-resistance materials such as Alloy C276 and Tantalum. The housing is available as a single-chamber or double-chamber version in plastic, aluminum, or stainless steel, with protection ratings up to IP68 with external electronics, as well as IP69K.