Omniflo® Low Flowmeters

FTI Flow Technology FTO Omniflo® Series turbine flowmeters turbine flowmeters are tangential flow transducers capable of measuring very low flow rates in either liquid or gas. These high resolution, volumetric flow sensing instruments provide excellent speed of response and repeatability.

Features:
  • Operates in low flow ranges where standard axial turbine flowmeters cannot be used
  • Accuracy of ±0.2% in liquids and ±0.3% in gas when paired with linearizing electronics
  • Repeatability better than ±0.1% of reading in liquids and ±0.2% of reading in gas
  • Measures flow rates as low as 3.78 mLPM (0.001 GPM) in liquids, and 2.5 LPH (0.0015 ACFM) in gas
  • Standard configuration withstands pressures up to 400 BAR (5,800 psi), dependent on end connection. High pressure housings available up to 4,000 BAR (58,000 psi)
  • Fast response time, up to 3 – 4 mSec in liquid applications
  • Compact size, 3" face-to-face with NPT of MS end connections

Specifications: [view spec sheet]

Applicable to both liquid and gas flowmeters:

Materials of Construction:

Standard:
316 SST Housing
17-4 PH Rotor
Teflon® O-Ring
15-7 Retaining Rings

Other materials of construction optional (see model number chart).

Bearing

Bearing Type Temperature Limits:
Sapphire jewel pivot
bearing, with tungsten carbide shaft:
 -60° F to 300° F
(-50° C to 149° C)
Note: Standard maximum operating temperature of the jewel bearing is 300° F. Maximum operating temperatures up to 600° F are available as a special.
Ceramic journal bearings: -100 F to 800° F
(-75° C to 425° C)
Ball Bearing 440 C stainless steel: -450° F to 300° F
(-270° C to 150° C)
Tungsten carbide journal bearings: -100° F to 1,200° F
(-75° C to 650° C)
Note: Not recommended for water service.

Filtration Recommendations

Ball Bearings 10 micron to 100 micron
(with less filtration for large sizes)
Journal Bearings
 100 micron

Operating Temp. Range:

Defined by pickoff and bearing selection

Pickoff

Pickoff Type Temperature Limits:
Magnetic
 -430° F to 350° F
(-260° C to 177° C)
High Temp. Magentic -430° F to 750° F
(-260° C to 400° C)
Modulated Carrier (RF) -300 F to 350° F
(-185° C to 177° C)
High Temp. (RF) -300° F to 750° F
(-185° C to 400° C)
Water Cooled Mag & RF Up to 1,100° F (593° C)

Pickoff Mating Electrical Connections

MS Connector:
2-pin, standard pickoff 15-89515-101
3-pin, amplified pickoff 15-89515-102
4-pin, pickoff with RTD 15-93825-01

Threaded Connection with Leads:
Junction Box with Terminal 73-31836-105

Operating Pressure Range

Defined by end connection rating up to 400 BAR (5,800 psi) standard. Special high pressure available up to 4,000 BAR (58,000 psi)

Liquid Service

Performance specifications are based on test with water at normal conditions (viscosity of 1.0 centistoke) with Pivot Bearing.
Calibration Accuracy

<+0.05% of reading (accuracy of primary flow calibration standard directly traceableto NIST)

Repeatability

<+0.1% of reading

Linearity

+/-0.1% with linearizing electronics

 Pressure Drop

Less than 700 mBAR (10 psid) at maximum flow rate

Dynamic Response

Less than 5 mS response to a step change of flow rate

Viscosity

Maximum viscosity recommended 50 CST

Note: Universal viscosity calibrations may limit flow range (consult factory). Multiple viscosity calibrations available.

Gas Service

Performance specifications are based on air at standarad conditions 14 psia and 68° F (1 BAR and 20° C) with Pivit bearing.

Calibration Accuracy

<+0.3% of reading (accuracy of primary flow calibration standard directly traceable to NIST.

Repeatability

<+0.2% of reading

Linearity

<+1.0% with linearizing electronics

Pressure Drop

Less than 20 mBAR (8 INWC) maximum flow rate

Note: Due to the specialized nature of aggressive fluid applications, some customizing is often required. A completed Flow Technology Application Form is used to select the best materials and connections for each application.

Specifications and dimensions are subject to change without notice.