The SMF-V300 vortex flow transmitter delivers precise fluid monitoring in severe closed-pipe applications. 

The device consists of a full stainless steel (SS304) sensor body paired with a polyurethane-coated die-cast aluminum converter housing (p. 3). Designed for hazardous areas, the flameproof shell utilizes dual-power configurations (24V DC or long-life internal lithium battery) and handles harsh outdoor environments with high UV, ambient moisture, and thermal stress.

• Patented Karman Vortex Sensing Matrix: Utilizes a precision-engineered triangular bluff body to ensure continuous, highly linear vortex shedding, delivering stable speed-flow volumetric measurement under varying fluid velocities.

• Dual-Core Signal Process Filtering: Integrates an advanced digital differential algorithm alongside advanced wave-filtering and structural shielding, providing superior immunity against heavy industrial pipeline vibrations and electronic background noise.

• Intelligent Multi-Variable Compensation: Supports built-in mathematical software algorithms for saturated and superheated steam mass flow computation via dedicated external pressure and temperature sensor signal coupling.

• Multi-Tier Secure Access Programming: Features a password-protected firmware architecture with customized access matrices (User, Engineer, and Factory modes) to prevent unauthorized field K-factor calibration or parameter drift.

• Dual-Power Redundant Configuration: Engineered with a flexible power management module supporting stable 24V DC line execution, independent long-life Lithium Battery operation, or automatic 24V DC/Battery dual-power failover.

• Wide-Range Thermal Fluid Adaptation: Offers high-grade physical material configurations with structured process rating tolerances across three specialized temperature tiers, successfully managing severe thermal fluids from -20°C up to +350°C.

• Programmable Digital Terminal Interfaces: Equipped with a 5-line high-contrast backlit LCD smart screen allowing non-intrusive operation, supporting fully isolated 2-wire/3-wire 4-20mA loop outputs, high-frequency active pulses, RS485 MODBUS RTU, and optional HART protocols.

• Rugged Flameproof Industrial Enclosure: Manufactured with an SS304 stainless steel sensor body mated to a polyurethane-coated die-cast aluminum converter body, ensuring an Ex-rated explosion-proof structure for harsh outdoor utility grids.

• Manufacturer Brand: SMATEC

• Product Model: SMF-V300 Series (Vortex Flow Meter)

• Operating Principle: Karman Vortex Street Effect

• Measurable Media: Saturated Steam, Superheated Steam, Compressed Air, Industrial Gases, Low-Viscosity Liquids

• Nominal Diameters (DN): DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300

• Measurement Accuracy:

  • Liquids: ±1.0% of rate

  • Gases & Steam: ±1.5% of rate

• Process Connections: Wafer type and Flange type

• Flange Ratings: EN 1092-1 (PN10, PN16, PN25 standard), ASME B16.5 (1/2" to 12" 150 lb RF), JIS 10K / 20K

• Fluid Process Temperature Tiers:

  • T1 Level: -20°C to +70°C

  • T2 Level: -20°C to +250°C

  • T3 Level: -20°C to +350°C

• Ambient Working Temperature: -10°C to +55°C (Standard with aluminum converter housing)

• Storage Temperature Range: -20°C to +70°C

• Wetted Parts Material: SS304 Stainless Steel (Sensor body and bluff body generator)

• Converter Enclosure Material: Polyurethane-coated die-cast aluminum (Flameproof shell)

• Standard Turndown Ratio: 10:1

• Electrical Analog Outputs: 2-wire 4–20mA current loop, 3-wire 4–20mA current output

• Pulse & Frequency Outputs: Passive Photoelectric Isolated Open Collector (OC) output, Active Push-Pull (PP) pulse output

• Maximum Pulse Frequency: 3000 Hz (High level amplitude > 22V, Low level amplitude < 0.8V)

• Digital Interfaces: RS485 (Native MODBUS RTU Protocol), Optional HART Communication protocol

• Power Configurations: 24V DC auxiliary line power, Long-life Internal Lithium Battery pack, or 24V DC + Battery dual-power mode

• Secure Access Firmware Codes: 1234 (User Menu Access), 1010 (Engineer Calibration Matrix), 5555 (Total Flow Reset/Clear Zero)

• Energy and Thermal Power: Precision mass flow accounting for high-temperature saturated steam and superheated steam lines within regional district heating grids.

• Chemical and Petroleum Industry: Reliable volumetric process control of non-conductive hydrocarbons, organic solvents, industrial gases, and light chemical liquids.

• Utilities and Manufacturing: General plant measurement of compressed air loops, nitrogen/oxygen distribution lines, and industrial water cooling networks.