Product Short Description
Product Brief
Inline industrial thermal mass flow measurement device manufactured by Emerson fluid control division, directly measures gas mass flow rate without pressure or temperature compensation for compressed air, nitrogen, oxygen and industrial process gas pipeline monitoring.
Model Series
Emerson MFM600 Series Compact Thermal Gas Mass Flow Meters for Low-to-Medium Flow Industrial Gas Applications
Description
Technical Specifications
- Primary Measurement Principle: Constant power thermal dispersion mass flow sensing
- Supported Process Gas Media: Compressed air, nitrogen, argon, oxygen, carbon dioxide, methane
- Nominal Pipe Connection Size: DN15 standard inline threaded process connection
- Full Scale Mass Flow Measurement Range: 0 – 120 Nm³/h standardized normal cubic meter per hour
- Process Operating Pressure Range: 0 bar(g) – 16 bar(g) maximum continuous gas line pressure
- Process Fluid Temperature Range: -20 °C to +80 °C gas medium temperature
- Ambient Operating Temperature Range: -10 °C to +50 °C meter electronics housing
- Standard Signal Outputs: 4–20 mA analog mass flow signal + Modbus RTU digital communication
Functional Features
- Integrated built-in temperature and pressure self-compensation for accurate mass flow calculation
- On-board local digital display for instantaneous flow rate and totalized gas consumption value
- Configurable high/low flow rate alarm relay contact output for pipeline flow interlock control
- Non-volatile internal totalizer register with 10-year gas consumption data retention
- Field replaceable flow sensing probe without full pipeline shutdown disassembly
Performance Parameters
- Mass flow measurement accuracy: ±1.0% full scale calibrated range
- Flow repeatability error: ≤ ±0.2% full scale
- Response settling time to flow change: ≤ 3 seconds
- Zero drift long-term stability: ≤ ±0.3% full scale per annual operation cycle
- Analog output linearity error: ≤ ±0.05% full 4–20mA signal range
Material Composition
- Process wetted flow sensor probe: 316L stainless steel corrosion-resistant alloy
- Inline process flow body: Cast aluminum alloy with anti-corrosion epoxy coating
- Electronic enclosure housing: Die-cast aluminum IP65 weatherproof rated housing
- Internal thermal sensing elements: Platinum thin-film precision temperature resistance sensors
- Process connection thread: Nickel-plated carbon steel NPT threaded fitting
Structural Characteristics
- Compact inline insertion form factor for direct installation on DN15 gas pipeline segments
- Separate upper electronics housing compartment isolated from lower process flow body
- Front-mounted backlit LCD local flow display with tactile programming operation buttons
- Side-mounted terminal wiring chamber for signal output and power supply cable entry
- Standard NPT threaded male process connection for direct pipe thread mounting
Working Principle
Two matched platinum thin-film thermal sensing probes are inserted into gas pipeline flow stream; one sensor acts as reference temperature probe, second probe receives constant low-power heating excitation; flowing gas medium convects heat away from heated probe creating temperature differential proportional to gas mass flow velocity; internal microcontroller converts measured temperature differential signal to standardized mass flow value; compensated mass flow data converted to 4–20mA analog output and Modbus digital data for external PLC/DCS control system integration, with continuous totalization of cumulative gas consumption stored in non-volatile memory register.
Advantage Highlights
- Direct mass flow measurement eliminates requirement for separate pressure and temperature transmitter compensation systems
- Compact DN15 inline design enables simple retrofitting into existing small-bore industrial gas pipeline networks
- IP65 rated electronic housing supports installation inside unconditioned factory plant environments
- Combined analog 4–20mA and digital Modbus dual output compatibility with all mainstream industrial control systems
- Field serviceable sensing probe minimizes pipeline downtime during periodic maintenance and calibration
Applicable Industries
Automotive manufacturing compressed air monitoring, semiconductor nitrogen purge gas flow tracking, food processing inert gas blanketing flow measurement, pharmaceutical sterile process gas consumption metering, welding shielding gas pipeline flow monitoring
Installation Requirements
- Install meter on horizontal gas pipeline segments with minimum upstream straight pipe length of 10 × DN pipe diameter, downstream straight pipe length of 5 × DN pipe diameter
- Mount electronics housing vertically oriented to prevent liquid condensate ingress into sensing probe compartment
- Process gas pipeline must incorporate fine particulate filter upstream of flow meter to eliminate sensor contamination
- External 24 VDC power supply wiring must utilize shielded cable with single-point cabinet grounding
- Avoid installation within 1 meter distance of pipeline pressure regulation valves or orifice flow turbulence generating fittings
Usage Precautions
- Process gas medium must be dry non-condensing vapor; liquid condensate contact will permanently damage platinum thermal sensing probes
- Do not exceed maximum rated 16 bar(g) continuous pipeline operating pressure
- Disconnect external power supply before accessing internal electronics wiring terminal chamber
- Schedule annual factory calibration service to maintain stated ±1.0% full scale measurement accuracy
- Prevent abrasive particulate laden gas flow to avoid mechanical erosion of 316L stainless steel sensing probe surface
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