MIM - Small Inline Stainless Steel Magnetic Flow Meter for Liquids

The MIM flowmeter offers multiple measurement ranges from 0.16 GPH to 170 GPM (0.01 to 650 LPM), with accuracy of ±(0.8% of Reading + 0.5% of Full Scale) under reference conditions. The repeatability is ±0.2% of Full Scale.

Key Range Options:

• Smallest Range: 0.16-16 GPH (0.01-1 LPM) - Model code 01G/01H
• Largest Range: 0.8-170 GPM (2.6-650 LPM) - Model code 40G/40H

Response Time: <100ms for alarm/pulse/frequency outputs, <1s for analog outputs

The electromagnetic measurement principle provides excellent linearity across the full range, making it ideal for applications requiring precise flow monitoring in small to medium-sized piping systems.

Maximum Operating Conditions:

• Pressure: 230 PSI (16 bar) maximum
• Temperature ranges vary by model and cable type:
  Compact Version (C3T):
  • MIM-12 /MIM-13 : -4°F to 158°F (-20°C to 70°C) continuous
    
    Note: Short-term operation up to 185°F (85°C) is possible for maximum 60 minutes at ≤104°F ambient temperature, with minimum 4-hour recovery period for C3T version.
  
  
  Remote Version with ETFE Cable (E02) or PVC Cable (P02)
  • FTFE Cable:
    • MIM-12: -4°F to 284°F (-20°C to 140°C)
    • MIM-13: -40°F to 284°F (-40°C to 140°C)
  • PVC Cable:
    • MIM-12/MIM-13: -4°F to 185°F (-20°C to 85°C)

Response Time Performance:

• Alarm/Pulse/Frequency Outputs: <100ms (t90)
• Analog Outputs: <1 second (t90)
• Temperature Measurement: <20s (t90) for signal output
• Display Update: Configurable from 0.5 to 10 seconds

The fast response time for switching outputs makes the MIM ideal for process control applications requiring rapid response to flow changes, while the analog outputs provide smooth, filtered signals for recording and trending applications.

Environmental Ratings:

• Protection Class: IP67 (weatherproof) per EN 60529:2014
• EMC Compliance: EN 61326-1:2013
• Shock Resistance: 20g (11ms) per DIN EN 60068-2-27:2010
• Vibration Resistance: 5g (10-2000Hz) per DIN EN 60068-2-6:2008
• Environmental Testing: Severity Level b per DIN EN 60068-2-30:2006

The all-metal stainless steel construction (316L SS) with integrated pressure compensation element prevents moisture ingress while allowing the device to operate in harsh industrial environments both indoors and outdoors.

Minimum Conductivity: ≥20 µS/cm (≥35 µS/cm for measuring ranges 01G/01H)

Impact on Performance:

• The device continuously monitors conductivity and displays 'Empty Pipe' error when conductivity falls below minimum
• Air bubbles or varying conductivity can reduce accuracy

Common Media Conductivities:

• Tap water: 200-800 µS/cm
• Deionized water: <10 µS/cm
• Most aqueous solutions: >100 µS/cm
• Hydrocarbons: <1 µS/cm

Yes, the MIM provides true bidirectional measurement with directional indication:

Flow Direction Features:

• Positive/Negative flow indication with ± symbols on display
• Configurable totalization: Absolute or bidirectional counting modes
• Arrow marking on housing indicates positive flow direction
• No flow restrictions - symmetric design works equally in both directions

Applications:

• Fill/drain operations with single meter
• Batch processes requiring net volume calculation
• System leak detection through bidirectional monitoring

Compatible Media:

• Conductive liquids with ≥20 µS/cm conductivity
• Water-based solutions (process water, chemicals, etc.)
• Acids and bases (within material compatibility)

Incompatible Media:

• Pure hydrocarbons (oils, fuels - insufficient conductivity)
• Gases (requires liquid-filled pipe)
• Steam or other vapor phases
• Non-conductive liquids (deionized water, pure solvents)

Special Considerations:

• Maximum viscosity: 70 cSt
• Solids content: No specific limit, but particles should not coat electrodes
• Temperature cycling: Consider thermal expansion of connections

Output Configurations (2 configurable outputs):

• Analog: 4-20mA, 0-10VDC (Output behavior according to NAMUR NE43 can be activated)
• Digital: NPN, PNP, Push-Pull switching outputs
• Pulse: Scalable volume pulses (1ms to 20s)
• Frequency: 50-1000Hz proportional to flow

Communication Protocols:

• IO-Link V1.1 (standard on Output 1) - COM3 bitrate, 1.1ms minimum cycle time

Advanced Features:

• Dual independent outputs can monitor different parameters simultaneously
• Batching function with START/STOP/RESET control
• User-configurable scaling for any output type

IO-Link Advantages:

• Easy configuration with IODD device description files
• Real-time diagnostics including empty pipe, sensor errors, range violations
• Remote parameterization without field visits
• Process data: Flow (24-bit), Temperature (12-bit), Volume (32-bit float)
• Block parameterization for multiple device setup

Diagnostic Information Available:

• Device status monitoring (temperature sensor failure)
• Process variable alerts (empty pipe, out of measuring range)
• System events (simulation active, internal hardware error)

Integration Benefits:

• Reduces wiring costs (3-wire connection vs separate analog outputs)
• Centralized configuration through PLC/DCS systems
• Enhanced troubleshooting with detailed diagnostic data

Power Supply:

• Voltage: 19-30 VDC
• Current Consumption: Maximum 200mA (without outputs loaded)
• Connection: M12x1 4-pin connector (IP67 rated)

Electrical Connection Options:

• Compact Version: Direct M12 connection
• Remote Version: 2m cable standard (PVC or ETFE), extensions to 20m available
• Grounding: Required for proper EMI performance - M4 threaded connection point

Output Loading:

• Current outputs: Maximum 500Ω load resistance
• Voltage outputs: 500 Ω input impedance
• Switching outputs: 30VDC max, 200mA max, short-circuit protected

Piping Requirements:

• Upstream straight run: 3x pipe diameter minimum
• Downstream straight run: 2x pipe diameter minimum
• Pipe completely filled at all times
• Forward flow direction must match arrow on housing

Mounting Considerations:

• Universal mounting – almost any orientation (vertical, horizontal, or inclined)
• Avoid high vibration locations near pumps
• Electrical grounding required for non-metallic piping
• Tightening torques: 22-24 Nm (½"), 28-30 Nm (¾", 1")

Best Practices:

• Install upstream of valves, when possible, to avoid flow disturbances
• Avoid locations with gas accumulation (high points in horizontal runs)
• Avoid installations with downward vertical flow with free outlet
• Provide isolation valves for maintenance access
• Consider thermal expansion in piping design

Sizing Methodology:

1. Determine flow range: Select range where normal flow is 30-70% of maximum
2. Pressure drop considerations: Check pressure loss curves for each size
3. Pipe size matching: MIM available in ½", ¾", 1", and 2" sizes

Model Selection Criteria:

• MIM-12 (FKM seals): General industrial applications to 158°F
• MIM-13 (EPDM seals): Drinking water applications (WRAS, DVGW 270)
• Compact vs Remote: Remote version for harsh environments or remote display needs
• Cable type: PVC for 185°F max, ETFE for 284°F applications

Connection Options:

• Native threads: G-thread or NPT available
• Fitting kits: Available for different thread conversions
• Tri-Clamp options: 1" and 2" sanitary connections available

PLC/DCS Integration:

• IO-Link integration: Direct connection to IO-Link masters for complete diagnostics
• Analog signal conditioning: 4-20mA loops require appropriate input cards
• Fail-safe considerations: NAMUR NE43 compliance provides fault indication
• Loop powering: Can be loop-powered in 4-20mA mode

SCADA/HMI Integration:

• Real-time data: Flow rate, temperature, totalizer values
• Alarm management: Configurable high/low flow alarms
• Remote configuration: IO-Link enables remote parameter changes

Filter Types Available:

• Standard Filter (1-250): Rolling average with step detector, best for general use
• IIR Filter: Digital low-pass, good for moderate pulsation
• Exponential Smoothing: Maximum filtering for highly pulsating flows

Step Detector Configuration:

• JD Threshold: 0.05-1.00 (fraction of full scale) - default 0.1 (10%)
• JD ConfFactor: 1-25 consecutive threshold crossings required
• 0-ConfFactor: Zero suppression factor for low-flow stability

Application-Specific Settings:

• Peristaltic pumps: Use Exponential Smoothing with factor 100-200
• Centrifugal pumps: Standard filter with factor 25-50 typically adequate
• Pulsation dampers: Reduce required filtering, improve response time
• Critical alarm applications: Minimize filtering for fastest response

Routine Maintenance:

• Electrode inspection: Check for coating buildup every 6-12 months
• Electrical connections: Verify M12 connector sealing annually
• Calibration: Periodic calibration checks (2-4 years generally)
• Software backup: Document configuration parameters

Common Issues & Solutions:

• "Empty Pipe" error: Verify complete pipe filling and minimum conductivity is present
• Erratic readings: Check for air bubbles, electrical noise, or coating buildup
• Zero drift: Check installation and process conditions. Verify electrical connections and signals. Check calibration and re-calibrate if necessary.
• Temperature sensor error: Requires factory service (PT1000 element failure)

Troubleshooting Tools:

• Built-in diagnostics: Status display shows errors
• Simulation mode: Test outputs and displays without flow
• IO-Link diagnostics: Detailed fault information for root cause analysis

Preventive Measures:

• Grounding verification: Ensure proper electrical grounding
• Vibration monitoring: Check mounting hardware periodically
• Cable inspection: Remote versions - inspect cable for damage

Key Differentiators:

• All-metal construction: Superior durability vs competitive products
• Compact size: Modest footprint ideal for tight installations and small line sizes
• Integrated temperature measurement: PT1000 sensor provides dual functionality
• Advanced display: Color TFT with rotation capability
• IO-Link standard: Built-in Industry 4.0 connectivity vs costly add-on modules

Technology Advantages:

• Dual independent outputs: Flexibility not available in single-output competitors
• Batching functionality: Integrated dosing capability eliminates external controllers.
• NAMUR compliance: Analog output behavior according to NAMUR NE43

Performance Comparison:

• Accuracy: ±(0.8% reading + 0.5% FS) competitive with premium brands
• Rangeability: 100:1 up to 250:1 turndown ratio exceeds many competitors
• Response time: <100ms switching response faster than most alternatives

vs. Turbine Flowmeters:

• No moving parts - eliminates mechanical wear and maintenance
• Bidirectional capability without modification
• Unaffected by viscosity changes
• Lower pressure drop at equivalent accuracy

vs. Vortex Flowmeters:

• No minimum Reynolds number requirement
• Measures very low flows accurately
• No vibration sensitivity issues
• Works with high-viscosity fluids

vs. Positive Displacement:

• Lower pressure drop reduces pumping costs
• No calibration drift over time
• Handles dirty/abrasive media without wear

vs. Ultrasonic Flowmeters:

• Works with dirty media compared to transit time based meters
• No acoustic coupling requirements
• Lower cost for small line sizes

Retrofit Applications:

• Replacing mechanical meters with maintenance issues
• Upgrading from local indication to remote monitoring with IO-Link
• Consolidating multiple measurement points with dual-output capability
• Adding temperature measurement to existing flow-only installations

Why Choose the MIM for New Projects:

• Industry 4.0 initiatives requiring digital connectivity
• Process optimization needing fast, accurate flow data
• Energy efficiency programs requiring precise measurement

How MIM Saves You Money:

• Reduced maintenance costs vs mechanical alternatives
• Lower total installed cost with integrated temperature measurement
• Improved process control leading to reduced waste

What You Gain from Upgrading:

• Faster response time needed for process control
• Better rangeability to handle varying process conditions

Primary Industries:

• Water/Wastewater: Municipal systems, irrigation, industrial water treatment
• Chemical Processing: Acid/base metering, continuous process feed control, batch operations
• HVAC: Chilled water, heating loops, energy monitoring

Your Benefits from Digital Connectivity:

• IO-Link V1.1 compliance enables seamless integration with modern automation platforms
• OPC-UA compatibility through IO-Link masters for enterprise connectivity
• Cloud connectivity possible through IO-Link-to-cloud gateways

How You'll Reduce Maintenance Costs:

• Condition monitoring through continuous diagnostics
• Trending analysis of key parameters for early fault detection
• Remote configuration capability reduces site visits

How Your Data Works Harder:

• High-resolution data (24-bit flow, 32-bit volume) for precise analytics
• Timestamp capability through connected systems
• Energy monitoring applications with temperature measurement

How You'll Meet Sustainability Goals:

• Energy efficiency through accurate measurement enabling optimization
• Reduced waste from precise process control