ONICON- F 2600 Series Inline Vortex Flow Meter For Water & Steam

The ONICON F-2600 series vortex flow meter is a flexible design that provides accurate, reliable flowmeasurement in steam and high temperature water applications. The F-2600 is designed with a two stage all welded bluff body/sensor design that enhances signal sensitivity and extends the operating range of the meter. This innovative feature also protects thesensors from pressure shocks and solids suspendedin the flow stream.

The basic loop powered model provides volumetric flow measurement for water at temperatures up to500° F. Adding the integral temperature sensor optionallows for mass flow measurement of saturated steam.Meters provided with integral pressure and temperature sensors are capable of measuring mass flow of superheated steam. 

Optional versions of the meter that include serial communications and multiple analog outputs are also available.


  • Mass flow measurement from a single instrument
  • Optional steam energy flow measurement
  • Integral 1,000 W platinum RTD for precise temperature measurement
  • Optional pressure transducer for accurate pressure readings at the meter location
  • Maintenance free non-moving parts design
  • Wear resistant bluff body/sensor design
  • Advanced signal processing algorithms ensure stable flow readings and reject noise
  • Easy-to-install meter arrives fully programmed and ready to use


  • Saturated steam
  • Hot water to 500° F (260° C) standard,750° F (400° C) optional
Applications with optional pressure sensor
  • Superheated steam to 500° F (260° C) standard,750° F (400° C) optional
  • Compressed air
  • Industrial gase


Percent of reading accuracy to within
± 0.7% for liquids (volumetric)
± 1% for steam and gases (volumetric)
± 1.5% for steam and gases (mass)
For Reynolds Number ≥ 10,000
± 0.2%
Long term stability
±0.2% over a period of 1 year
Sensing Method
Vortex shedding with integral piezoelectric sensors
Integral 1,000Ω platinum RTD (optional) provides instantaneous temperature
Integral pressure transducer (optional) provides instantaneous pressure
-40° F (-40° C) to 185° F (85° C)
-330° F (-200° C) to 500° F (260° C)
optional high temperature limit 750° F (400° C)
Maximum Operating Pressure
≤ Flange rating or 1500 psi (103 bar)
Pressure Loss
Pressure loss varies with meter size and flow rate.
Connection Type
ANSI Class 150, 300 or 600 flanges
Wafer style
Sensor Body
316L Stainless Steel
Bluff/ Sensor Body
316L Stainless Steel
Electronic Enclosure
Epoxy painted aluminum
NEMA 4X (IP66)
Input Power Options
Loop Power
14 – 36 VDC, 22 mA maximum current
External DC Power
18 – 36 VDC, 300 mA maximum current
EExternal AC Power
100 – 240 VAC 50/60 Hz, 5 W maximum power
2-line, 16 character alphanumeric LCD with backlighting option. Standard saturated steam display menu provides: mass flow rate, temperature, pressure (calculated), mass total and alarms (if active).
Optional remote mount transmitter version available (Standard cable length 50 ft., maximum 100 ft.)
Output Signal Provided
DC Loop Powered Version (Standart)
Analog Rate: 2-wire, 4-20 mA
Totalization: 2-wire scaled pulse, 50 ms duration, 5 – 36 VDC @ 40 mA maximum
Frequency: 2-wire, open collector, 10 kHz maximum, 5 – 36 VDC @ 40 mA maximum
Digital: HART® serial communications

Optional external DC or AC powered version
Analog Rate: Up to three 2-wire, 4-20 mA outputs
Totalization: one 2-wire scaled pulse output, 50 ms duration, 5 – 36 VDC @ 40 mA maximum
Frequency: one 2-wire, 10 kHz maximum, 5-36 VDC @ 40 mA maximum
Digital: HART® serial communications
Alarm: Up to three opto-coupled relay alarm outputs

Optional on DC or AC powered version
MODBUS RTU RS485 or BACnet MS/TP serial communications in place of HART®
FM/FMC Approvals
Class I, Division 1, Groups B, C, & D
Class II/III, Division 1, Groups E, F, & G
Type 4X and IP66, T6, Ta = -40 to 60°C