Scraper Type Magnetic Flowmeter
Maintain accurate measurement in fouling applications with manual scraper electrodes that remove scale buildup without process interruption. Designed for sewage, slurry, and high-solids media where electrode fouling causes standard flowmeters to drift or fail—delivering consistent ±0.5% accuracy through mechanical cleaning that restores conductivity without removing the meter from service.
- Pipe Size: DN15 – DN3000
- Electrode Type: Manual Scraper Electrode
- Flow Accuracy: ±0.5% (±0.3%/±0.2% optional)
- Pressure: 0.6 – 4.2 MPa (higher by customization)
- Protection: Sensor IP65/IP67/IP68, Converter IP65
- Cleaning: Manual shaft rotation (no disassembly required)
Request QuotationTechnical Consultation
Eliminate Electrode Fouling Without Process Shutdown
Four reasons scraper electrodes solve measurement challenges in sewage and slurry applications
- Restore accuracy in seconds—no process interruption required
- Continuous accuracy in media that fouls standard electrodes
- 95% reduction in cleaning time—minutes vs. hours
- Proven performance in media with >10,000 mg/L suspended solids
Parameter | Specification |
|---|---|
Measurement Principle | Electromagnetic (Faraday's Law) with scraper electrode cleaning |
Pipe Size Range | DN15 – DN3000 (custom sizes available) |
Electrode Type | Manual scraper electrode with external rotating shaft |
Flow Accuracy | ±0.5% of reading (±0.3% / ±0.2% optional) |
Repeatability | ±0.1% of reading |
Velocity Range | 0.5 – 10 m/s (bidirectional) |
Fluid Temperature | -25°C to +80°C |
Ambient Temperature | -20°C to +60°C |
Pressure Rating | 0.6 – 4.2 MPa (higher pressure by customization, max <10 MPa) |
Conductivity Requirement | ≥ 5 μS/cm (≥20 μS/cm recommended) |
Liner Materials | Polychloroprene Rubber, PTFE, F46 (FEP), PFA |
Electrode Materials | 316L SS, Titanium, Stainless Steel Tungsten Carbide Coated |
Scraper Mechanism | Manual rotating shaft with O-ring shaft seal |
Power Supply | 85-250V AC (45-63Hz) or 20-36V DC |
Output Signals | 4-20mA, Pulse, Frequency, RS485 Modbus |
Display | LCD/OLED: flow rate, totals, velocity, diagnostics |
Installation Environment | Requires dry, clean environment for shaft seal protection |
Diagnostics | Empty pipe detection, electrode fouling alarm, excitation monitoring |
Explosion-Proof | SIL-3 Certification |
Quality Standards | CE Certification |
Liner & Electrode Material Selection Guide
Materials for Fouling and Abrasive Applications
Liner Materials Table:
Lining Material | Temperature Range | Best Applications |
|---|---|---|
Polychloroprene Rubber | -25°C to +80°C | Raw sewage, activated sludge, municipal wastewater, general industrial wastewater |
PTFE | -25°C to +130°C | Chemical wastewater, acidic/alkaline slurries, corrosive effluents, paper pulp |
F46 (FEP) | -25°C to +150°C | Aggressive chemical slurries, high-temperature wastewater, abrasive media |
PFA | -25°C to +180°C | High-purity wastewater, pharmaceutical effluent, severe chemical environments |
Electrode Materials Table:
Electrode Material | Erosion Resistance | Typical Applications |
|---|---|---|
316L Stainless Steel | General corrosion resistance | Municipal sewage, activated sludge, low-abrasion slurries |
Titanium | Excellent chloride resistance | Seawater-influenced wastewater, hypochlorite-treated effluent |
Tungsten Carbide Coated Stainless Steel | 316L Stainless Steel | Mining slurries, grit-laden wastewater, paper pulp, abrasive industrial slurries |
Protection Rating:
IP65 (Converter Standard): Dust-tight, water jet resistant—suitable for indoor installations
IP65/IP67/IP68 (Sensor Options):
- IP65: Water jet resistant—indoor or protected outdoor
- IP67: Temporary immersion to 1m—outdoor installations, occasional flooding
- IP68: Continuous submersion—NOT RECOMMENDED (shaft seal requires dry environment)
Proven Performance in Fouling-Prone Applications
Scraper electrodes solve electrode fouling challenges in sewage, slurry, and high-solids industrial processes
Municipal Wastewater Treatment
- Raw sewage influent measurement
- Activated sludge return flow (RAS)
- Waste activated sludge (WAS) metering
- Primary sludge transfer
- Digester feed and return
- Grit slurry transport
Industrial Wastewater & Process
- Chemical process wastewater
- Food processing effluent with organics
- Brewery and beverage waste streams
- Textile dyeing wastewater
- Metal finishing effluent
- Pharmaceutical process wastewater
- Petrochemical oily water
Pulp & Paper Industry
- Stock consistency measurement
- White water flow (fiber-laden)
- Black liquor (kraft process)
- Pulp slurry transport
- Coating preparation flow
- Effluent treatment flows
Mining & Minerals Processing
- Tailings slurry transport
- Mineral ore slurries
- Coal slurry pipelines
- Flotation feed streams
- Thickener underflow
- Concentrate transport
Dredging & Construction
- Dredge slurry pipelines
- Drilling mud circulation
- Bentonite slurry flow
- Foundation grout metering
- Sediment transport systems
Scraper-type installation requires accessible, dry location for reliable shaft seal performance
Critical Installation Requirements
- Pressure Check: Verify operating pressure <10 MPa. Scraper shaft seal not rated for higher pressures.
- Dry Environment: Confirm installation location protected from continuous moisture. Shaft seal requires dry conditions.
- Cleaning Schedule: Establish cleaning frequency based on fouling rate. Document cleaning events and measurement drift trends.
- Maintenance Access: Ensure operators can reach scraper shaft without scaffolding, confined space entry, or excessive PPE.
Maintenance & Cleaning Schedule
High Fouling Rate (Daily Cleaning):
- Raw sewage influent with grease/fats
- High-solids activated sludge >8,000 mg/L
- Mining slurries with rapid settling particulates
Moderate Fouling Rate (Weekly Cleaning):
- Secondary effluent with biofilm growth
- Industrial wastewater with moderate organics
- Paper pulp stock <5% consistency
Low Fouling Rate (Monthly Cleaning):
- Treated effluent with low TSS
- Process water with occasional solids
- Clear wastewater with scaling tendency
Get Your Free Quote Now
Stop guessing. Get precise measurement in your toughest applications. Request sizing and pricing now—our engineers respond same-day
info@hbmeter.cc
(+86) 152-3780-0315
1 Jingsan North Road, Xiangfu District, Kaifeng, Henan 475004 China
About HBmeter
AFT Instruments is a high-tech manufacturer delivering precision flow instrumentation for water, chemical, power, industrial automation, and process industries.
View moreContact Us
info@hbmeter.cc
(+86) 152-3780-0315
(+86) 152-3780-0315
Related Products
Integrated Magnetic Flowmeter
Battery-Powered Magnetic Flowmeter
threaded Magnetic Flowmeter
Partial-filled pipe Magnetic Flowmeter
Slurry Magnetic Flowmeter