Integrated Electromagnetic Flowmeters

Industry Application Guidance

The HBLD-X electromagnetic flowmeter is suitable for measuring conductive fluids across diverse industries. Below is general application guidance to help determine if electromagnetic measurement is appropriate for your specific fluid.

Important Note: The configurations listed below are general guidance for electromagnetic flowmeter technology, not documented installations of the HBLD-X specifically. For application-specific recommendations based on your exact fluid composition, temperature, pressure, and process conditions, please consult our application engineering team.

Water & Wastewater Treatment

Suitable Fluids:

• Raw water, treated water, potable water
• Process water, cooling water, boiler feedwater
• Wastewater, sewage, effluent
• Activated sludge, return activated sludge (RAS)
• Waste activated sludge (WAS)
• Digester feed, thickened sludge

Typical Liner Selection:

• Clean water: Neoprene liner (cost-effective)
• Sludge/high solids: Polyurethane liner (abrasion resistance) or Neoprene

Typical Electrode Selection:

• General use: SUS316L stainless steel
• High chlorine content: Titanium (if >100 ppm free chlorine)

Application Notes:

• Empty pipe detection essential for applications with intermittent flow
• IP68 rating recommended for outdoor or wet pit installations
• Battery power option useful for remote monitoring stations

Chemical Processing

Suitable Fluids:

• Sulfuric acid (H₂SO₄) at various concentrations
• Hydrochloric acid (HCl)
• Nitric acid (HNO₃)
• Phosphoric acid (H₃PO₄)
• Sodium hydroxide (caustic soda, NaOH)
• Sodium hypochlorite (bleach, NaOCl)
• Various salt solutions and brines

Typical Liner Selection:

• Corrosive chemicals: PTFE, PFA, or F46 liner required
• High temperature (>80°C): PTFE or PFA

Typical Electrode Selection:

• Sulfuric acid: Hastelloy C
• Hydrochloric acid: Hastelloy B or Hastelloy C
• Sodium hydroxide: Hastelloy C or Nickel
• Sodium hypochlorite: Titanium

Application Notes:

• Verify liner and electrode compatibility with specific chemical and concentration
• High-temperature applications may require special cable glands
• Grounding critical in corrosive chemical service

Important: Contact application engineering before specifying for chemical service. Provide complete fluid data: chemical name, concentration, temperature, pH.

Mining & Mineral Processing

Suitable Fluids:

• Iron ore slurry, copper concentrate slurry
• Coal slurry, mineral slurries
• Tailings, thickener underflow/overflow
• Flotation circuit fluids
• Process water with suspended solids

Typical Liner Selection:

• Abrasive slurries: Polyurethane liner (best abrasion resistance)
• Less abrasive: Neoprene liner acceptable

Typical Electrode Selection:

• General mining slurries: SUS316L sufficient

Application Notes:

• Size meter for lower velocity (<3 m/s) to extend liner life in abrasive service
• Consider battery power for remote tailings lines without electrical infrastructure
• Expect periodic liner replacement in high-abrasion applications (normal wear item)

Food & Beverage

Suitable Fluids:

• Milk, cream, yogurt, whey
• Fruit juices, concentrates, purees
• Beverage syrups, soft drinks, beer, wine
• Vegetable oils (if conductive additives present)
• CIP (clean-in-place) solutions

Typical Liner Selection:

• Food contact: PFA liner (FDA compliant)
• General food processing: PTFE acceptable

Typical Electrode Selection:

• Food grade: SUS316L stainless steel

Special Requirements:

• Sanitary tri-clamp connections (available on request)
• FDA 21 CFR 177.1550 compliant materials
• 3-A sanitary standards (available on request)
• Must withstand CIP cycles (hot caustic and acid cleaning)

Pharmaceutical & Biotechnology

Suitable Fluids:

• Process water, purified water
• Water for injection (WFI) – special low-conductivity model required
• Pharmaceutical intermediates
• Cleaning solutions (CIP/SIP)

Typical Liner Selection:

• Pharma applications: PFA liner (cleanroom compatible)

Typical Electrode Selection:

• General pharma: SUS316L
• WFI (ultra-pure water): Tantalum with special signal booster

Special Requirements:

• Sanitary design with tri-clamp connections
• Electropolished wetted surfaces
• FDA compliance and validation documentation
• IQ/OQ protocol support available

Note: WFI measurement requires special low-conductivity circuit (conductivity <1.3 μS/cm). Standard HBLD-X not suitable without modification—consult engineering.

Pulp & Paper

Suitable Fluids:

• White water, broke, stock flow
• Black liquor (kraft process)
• Bleach plant chemicals (sodium hypochlorite, chlorine dioxide)
• Coating and sizing solutions

Typical Liner Selection:

• Stock (fiber suspension): Neoprene or Polyurethane
• Black liquor (high temp): PTFE required
• Bleach chemicals: PTFE

Typical Electrode Selection:

• General pulp stock: SUS316L
• Black liquor: Hastelloy C
• Bleach plant: Titanium

Application Notes:

• Large pipe sizes common (DN200-DN600)
• Empty pipe detection useful for batch processes
• High-temperature cable glands needed for black liquor service

Power Generation

Suitable Fluids:

• Cooling water circulation
• Boiler feedwater (note: low conductivity)
• Condensate return
• Flue gas desulfurization (FGD) slurry

Typical Liner Selection:

• Cooling water: Neoprene
• FGD slurry: Polyurethane or PTFE

Typical Electrode Selection:

• Cooling water: SUS316L
• FGD (acidic slurry): Hastelloy C

Application Notes:

• Boiler feedwater (demineralized) has very low conductivity—verify suitability
• Large pipe sizes common in cooling water systems
• 24/7 operation requires high reliability

Desalination & Marine

Suitable Fluids:

• Seawater (intake and distribution)
• Brine discharge
• Brackish water

Typical Liner Selection:

• Seawater: Neoprene liner adequate

Typical Electrode Selection:

• Seawater/brine: Titanium required (high chloride corrosion resistance)

Application Notes:

• IP68 submersible rating often required for seawater intake structures
• Titanium electrode essential—SUS316L will corrode rapidly
• Periodic electrode cleaning recommended (biofouling in seawater)

Fluid Compatibility Check

Before specifying HBLD-X, verify your fluid meets these basic criteria:

✓ Electrically conductive (≥5 μS/cm minimum)

✓ Liquid phase (not gas or steam)

✓ Temperature within liner rating (Neoprene ≤80°C, PTFE ≤180°C)

✓ Chemically compatible with liner (check chemical resistance chart)

✓ Chemically compatible with electrode (check corrosion resistance data)

Not sure about compatibility? Submit fluid data for engineering review.

Critical Installation Guidelines

Proper installation is essential for accurate, reliable measurement. Follow these proven best practices to avoid the most common errors.

1. Pipe Fill Requirement

✓ CORRECT:

• Install at lowest point in piping system
• Ensure pipe is 100% full at all times
• Maintain adequate back-pressure downstream

✗ INCORRECT:

• Installing at highest point (air accumulation)
• Allowing partial pipe fill
• Insufficient downstream pressure

Why it matters: Electromagnetic flowmeters require complete contact between fluid and electrodes. Partially filled pipes cause severe measurement errors.

2. Straight Pipe Requirements

✓ CORRECT:

• Upstream: Minimum 5D straight pipe (10D preferred)
• Downstream: Minimum 2D straight pipe

D = Nominal pipe diameter Example: DN200 meter needs 5 × 200mm = 1000mm upstream

✗ INCORRECT:

• Installing directly after elbow (<2D)
• T-junction immediately upstream
• Pump discharge <5D upstream

Why it matters: Swirl and asymmetric flow profile cause measurement errors even with calibrated meter.

3. Flow Direction

Verify flow direction arrow on sensor body matches actual flow direction before installing.

The meter will indicate reverse flow if installed backwards (flow readings will be negative).

4. Grounding Requirements

For Metallic Pipes:

• Connect meter body to pipe with grounding strap
• Verify ground resistance <10Ω

For Non-Conductive Pipes (HDPE, PVC, FRP):

• Install grounding rings upstream and downstream
• Connect grounding rings to meter and earth ground

Why it matters: Without proper grounding, stray currents cause measurement instability and false readings.

5. Vibration & Support

✓ CORRECT:

• Support piping independently upstream and downstream
• Never use meter body as pipe support

✗ INCORRECT:

• Flowmeter supports pipe weight
• Rigidly mounted to vibrating pump

Why it matters: Mechanical stress causes sensor damage, flange leakage, and premature failure.

6. Electrical Installation

Power Supply:

• 220VAC models: Use 3-core cable (L, N, Ground)
• 24VDC models: Use 2-core shielded cable
• Fuse: 2A maximum

Signal Output:

• Use shielded cable for 4-20mA and RS485
• Ground shield at converter end only (avoid ground loops)

Cable Entry:

• Use proper cable glands matching IP rating
• Install blanking plugs in unused cable entries