FTB100-Series

Supported Applications

The Omega FTB100 Series comprises liquid turbine flow meters engineered for high-accuracy measurement of clean fluids with poor lubricating properties, such as water. These devices feature a shielded ball bearing design and deflector cones to stabilize the low-mass rotor, making them suitable for pulsating flow applications due to their rapid dynamic response.

Operating Conditions & Performance

The series delivers an accuracy of ±0.5% of reading with repeatability of ±0.1% of reading over the repeatable range. Standard NIST calibration is provided for water (viscosity = 1 cSt), with additional cost options available for other viscosity liquids ranging from 0.6 to 99 cSt and 100 to 299 cSt depending on meter size.

Process temperature limits span -268 to 232°C (-450 to 450°F), while ambient operating temperatures range from -40 to 85°C (-40 to 185°F). Maximum operating pressures vary by model, ranging from 2000 psig for the FTB-111 (3" NPT) up to 5000 psig for smaller models such as the FTB-101 through FTB-104. Linear flow ranges extend from 1.32 to 13.2 LPM (0.35 to 3.5 GPM) on the smallest model to 151 to 2460 LPM (40 to 650 GPM) on the largest.

Configuration Options

The FTB100 Series is available in multiple configurations defined by flow range, connection size, and signal conditioning options. Key configurable dimensions include:

• Process Connections: Standard NPT threads from ½" to 3" (FTB-101 through FTB-111). Optional MS flared and flanged styles are available.
• Wetted Materials: Body constructed of 304 stainless steel, rotor made of 17-4 PH steel, and ceramic bearings. Non-metallic bearing retainers are utilized for extended life.
• Signal Conditioning Options: Integral or remote signal conditioners (FLSC-C1-LIQ loop-powered; FLSC-C3-LIQ DC powered) provide outputs including 4 to 20 mA, 0 to 5 VDC, scaled frequency, pulse output, and amplified pulse.
• Hazardous Location Ratings: Enclosures for signal conditioners meet Class I, Div 1 & 2, Groups A, B, C & D; Class I, Zones 1 & 2, Groups IIB + H2 IIA; Class II, Div 1 & 2 Groups E, F & G; Class III. Ratings include NEMA 3, 4, 7(B, C, D) 9(E, F, G); Cenelec EEx d IIC IP66.
• Approvals: Units carry UL, CSA, FM Approved, ATEX Certified, CE, and RoHS certifications. ISO 9001 certification applies to manufacturing facilities in Stamford, CT and Manchester, UK.

Key Product Differences

The series distinguishes between the FTB-100 family (NPT fittings) and the FTB-200 family (37° flare fittings), though only NPT variants are currently enumerated in this bundle. Model numbers correspond to specific linear flow ranges for water; for example, the FTB-101 covers 1.32 to 13.2 LPM with a ½" MNPT fitting and 5000 psig rating, while the FTB-111 supports 151 to 2460 LPM with a 3" NPT fitting and 2000 psig rating.

Signal conditioner models differ in power requirements: FLSC-C1-LIQ operates on loop power (10 to 30 Vdc), whereas FLSC-C3-LIQ requires DC power (13 to 30 Vdc). The FTB-200 series utilizes MS flared fittings with specific thread sizes such as 3/4-16 UNF-3A and supports flow ranges from 0.35 to 3.5 GPM up to 15 to 225 GPM, with maximum operating pressures ranging from 1750 psi to 5000 psi.