Flow Instruments

Split-Type Electromagnetic Flow Meter Solution for Pump Stations with High Humidity and Heavy Vibration

Q: How should I select the LGF-PA66 for booster pumping stations and high-rise building zone metering?

Secondary (booster) supply systems have two metering positions with different requirements: the station master meter and the per-building zone meter. Station master meter : downstream of VFD-driven booster pumps, flow swings hard with speed changes and pump starts produce water hammer. The LGF-PA66 has no moving parts (hammer-tolerant), an unobstructed tube and near-zero pressure loss, so it does not erode pumping efficiency. Order ±0.5% or ±0.2% depending on billing duty, and size it at 1.0–1.5× rated pump flow — an oversized meter spends its life below the accurate velocity window. Building zone meter : day/night flow ratios of 10:1 are normal and the night minimum is the leakage indicator, so turndown rules. The LGF-PA66 (±0.5% version) reaches 100:1 turndown and holds accuracy at 0.3 m/s; logging at 5-minute intervals through an EC32 RTU feeds night-flow analysis on the secondary-supply supervision platform. Environment : stations are humid and zone meters usually sit in underground valve pits — order IP68, integral or split depending on pit depth. The lightweight PA66 body lets one technician install and service the meter in a tight pit without lifting gear. Power : off-grid points run on the low-consumption battery variant or solar. Comms : EC32 with 4G/NB-IoT and Modbus RTU/TCP connects directly to municipal supervision platforms or utility DMA systems. For more details, please visit our product page or contact our technical team.

Q: Which flow meter suits reclaimed water pipelines? Is the LGF-PA66 right for recycled-water duty?

Reclaimed water is aggressive: residual chlorine, suspended solids, algae, elevated conductivity and often flocculant carry-over. Metering it demands corrosion resistance, fouling tolerance and stable accuracy at the same time. Why the LGF-PA66 fits: Corrosion : the aviation-grade PA66 composite body is chemically stable in weak acids, alkalis and chlorinated water — it suffers none of the chloride pitting that kills 304/316L stainless bodies, the dominant failure mode in reclaimed-water service. Fouling : no moving parts, no cavities where sludge collects; light electrode coatings are compensated by the excitation scheme, which keeps the zero stable. Specify a PTFE liner with 316L or Hastelloy electrodes matched to the water chemistry. Accuracy : ±0.5% covers internal reclaimed-water accounting; use the ±0.2% version at custody-transfer points with reuse customers, verified periodically under JJG 1033. Typical deployment: LGF-PA66 (DN50–DN300) at the reclamation plant outlet and at each industrial offtake for billing; at park branch points the meter feeds an EC32 RTU that uploads instantaneous and totalized flow plus pressure to the reuse-management platform for quota control and leakage screening. In valve pits, order the IP68 submerged configuration with the split converter and RTU in a pit-side cabinet. For more details, please visit our product page or contact our technical team.

Q: Can the LGF-PA66 be installed on rural PE plastic pipelines? How is grounding handled?

Yes — PE pipelines are exactly where the LGF-PA66 shows its structural advantage. An electromagnetic meter needs a return path for its measuring signal; a conventional stainless-body meter relies on the conductive pipe wall, so on insulating PE pipe it requires external grounding rings or electrodes. Skip them and the zero drifts — the most common failure in rural water retrofit projects. The LGF-PA66 body is itself made of insulating PA66 composite and integrates a grounding-electrode arrangement, so the signal loop closes inside the meter. No external grounding ring is needed on plastic pipe: two fewer installation steps and two fewer potential leak points. Mechanical connection : electrofusion flange adapters or mating flanges per GB/T 9119, ANSI or DIN. Give us the PE pipe OD (dn110, dn160…) when ordering. Support : PE pipe is flexible — add rigid supports on both sides of the meter and never mount a valve directly behind it; closing a valve can create suction that lifts the liner. Full-pipe operation : pick a flooded location (low point or rising leg). The IP68-rated LGF-PA66 can sit in a meter pit with the split converter in a box above ground. Off-grid sites : pair the meter with a solar panel and an EC32 RTU (4G/NB-IoT) for a low-power telemetry package feeding rural water supervision platforms. For more details, please visit our product page or contact our technical team.

Q: LGF-PA66 electromagnetic flow meter vs turbine flow meter: which one should I use for clean water?

Both meters handle clean conductive water, but their construction leads to very different field behavior. Turbine meters use an impeller in the flow path to generate pulses. They are accurate (±0.5%–±1.0%), but the rotor is a wearing part: particles, scale and rust can jam it, low flow may never overcome bearing friction (a dead start-up band), and the constriction creates permanent pressure loss. On raw water carrying algae or floc, turbine bearings typically last only 1–2 years. The LGF-PA66 electromagnetic flow meter has an unobstructed measurement tube with no moving parts — only the liner and electrodes touch the medium. It is immune to particles and fibers, pressure loss is near zero, turndown reaches 100:1, and accuracy holds at velocities down to 0.3 m/s, which matches the strong day/night flow swings of supply networks. The aviation-grade PA66 composite body is roughly 60% lighter than a stainless body of the same size, cannot corrode, and the IP68 design allows submerged pit installation. Turbine meter: small-bore (DN4–DN40) batching of oil products or ultra-pure water. LGF-PA66: DN15 and above for potable water, reclaimed water and industrial water — especially custody-transfer points and DMA district meters. For more details, please visit our product page or contact our technical team.

Q: How should I choose between the 0.2% and 0.5% accuracy versions of the LGF-PA66 electromagnetic flow meter?

The LGF-PA66 is produced in both ±0.2% and ±0.5% accuracy versions. The choice depends on what the flow data is used for — not on picking the highest number. ±0.5% version : for process monitoring, internal water balance in wastewater plants, industrial cooling-water assessment and most DMA district meters, where readings guide operations rather than invoices. Paired with an EC32 RTU uploading instantaneous flow and pressure for night-flow leakage analysis, it is fully sufficient — and saves a price tier. ±0.2% version : for custody transfer and billing (water sales between companies, heat-supply metering), quota-based assessment, and any point verified under JJG 1033, the Chinese verification regulation for electromagnetic flow meters. On large lines a 0.3% error translates into a substantial annual billing difference. Two engineering details matter in practice. Rated accuracy holds within the 0.3–5 m/s velocity window — if the line runs persistently below 0.5 m/s, downsize the meter to raise velocity, otherwise neither version performs. The ±0.2% version is also less tolerant of installation disturbances: keep at least 10D straight pipe upstream and 5D downstream, away from pump-outlet turbulence. The integral PA66 body with built-in grounding electrode closes the signal loop inside the meter, which is what keeps the zero stable at high turndown. Specify the accuracy grade at order time — the two versions differ in converter calibration and are not interchangeable in the field. For more details, please visit our product page or contact our technical team.

Addressing the pain points of integral-type electromagnetic flow meters failing early as their electronics suffer from condensation-heavy humidity and pump vibration, cramped installation space in underground and submersible pump rooms, costly shutdown maintenance, and diverse conductive-media metering needs, this solution is built around split-type electromagnetic flow meters: the sensor and transmitter are installed separately, the measuring tube is injection-molded from aviation-grade LGF-PA66 reinforced composite with a weld-free structure that eliminates magnetic interference, the IP68 split sensor withstands immersion, and the transmitter is wall-mounted in a dry area away from vibration sources. With DN25-DN300 sizes, up to 4.0 MPa working pressure, 0.5% accuracy and 4-20 mA / RS485 / pulse outputs feeding RTUs and monitoring platforms, it delivers continuous accurate metering of pump station inflow and outflow plus energy-efficiency analysis in harsh humid, high-vibration environments.

Overview

Summary

Key Advantages

Split-type structure with IP68 protection: sensor and transmitter physically separated; the split sensor is rated IP68 for stable operation in damp or immersed conditions while the transmitter is mounted in a dry area away from moisture and vibration sources

Aviation-grade composite measuring tube: measuring section injection-molded as one piece from LGF-PA66 long-glass-fiber reinforced composite - the weld-free process fundamentally eliminates magnetic interference inherent in metal tubes, and the seamless sensor-tube structure rules out leakage

High accuracy and stability: standard 0.5% accuracy class with long-term stability below 0.2% FS/year, sensitivity temperature drift of ±1.5% FS/degC, and proprietary transmitter algorithms for fast response with stable repeatability and linearity

Wide media compatibility: meters conductive liquids above 50 uS/cm including two-phase media (tailings, slurry, pulp); electrode materials of 316L, titanium, tantalum, platinum etc. suit corrosive duties

Modular, easy maintenance: modular excitation coils reduce winding deviation and can be replaced quickly; dual waterproof sealing plus precision assembly, and independent transmitter mounting means electronics service never touches the pipeline

Flexible networking outputs: 4-20 mA, RS485 and pulse outputs with RS485 standard; the sensor is powered by the transmitter (220 VAC / 24 VDC), connecting directly to RTUs, telemetry terminals and SCADA platforms with national-standard flange connections

Challenges

High humidity and condensation attack electronics: underground and submersible pump rooms run above 90% relative humidity year-round, with condensation dripping from walls and pipes and occasional flooding; integral meters mount transmitters right beside the pipe, so boards corrode and displays fail frequently
Pump vibration shortens meter life: continuous vibration and water-hammer pulsation from pump start/stop transmit directly into meter electronics, loosening connectors and fatigue-cracking solder joints; in integral designs the electronics share the vibration zone with the sensor, sharply cutting service life
Cramped installation space, costly maintenance: pump rooms are dense with pipework and tight on space, and submersible stations can barely fit small instruments; integral meter heads occupy space beside the pipe, and replacing electronics requires full disassembly with water and power shutdowns
Complex multi-media metering needs: pump station media range from clean water to sewage, slurry and dosing chemicals with widely varying conductivity; two-phase solids-laden media demand wear- and corrosion-resistant electrodes, while ordinary meters wear out fast and drift
No telemetry, no efficiency analysis: most legacy pump station meters offer local display only, without RS485 or 4-20 mA outputs; flow data never reaches the monitoring platform, leaving pump efficiency testing, specific energy consumption and non-revenue water analysis without support

Results

Separated sensor and transmitter: the IP68 split sensor tolerates pump room humidity, condensation and short-term immersion while the wall-mounted transmitter stays in a dry area away from vibration - moisture-corrosion failures of electronics are virtually eliminated and system life is significantly extended
The aviation-grade LGF-PA66 composite measuring tube, injection-molded in one piece with a weld-free structure that eliminates magnetic interference, delivers 0.5% accuracy and long-term stability below 0.2% FS/year - pump station metering data stays trustworthy for years
DN25-DN300 sizes with 316L / titanium / tantalum / platinum electrode options cover clean water, sewage, slurry and corrosive media, with low electrode wear and minimal drift in solids-laden two-phase flows
4-20 mA / RS485 / pulse telemetry feeds RTUs and the monitoring platform in real time, enabling pump efficiency testing, specific-energy-consumption accounting and non-revenue water analysis for refined pump station operation
The independently wall-mounted transmitter allows electronics replacement without touching pipework or shutting down water - easy installation and maintenance in submersible and cramped pump rooms, sharply lowering lifetime maintenance cost

Solution Details

Split-Type Electromagnetic Flow Meter for Harsh Pump Station Environments

Water supply pump stations and drainage pumping stations are the power heart of pipe networks, and accurate metering of their inflow and outflow directly drives dispatch decisions, energy accounting and leakage analysis. Yet the pump station environment is extremely harsh for flow instrumentation: continuous vibration and pressure pulsation from pump sets directly impact meter electronics; underground and submersible pump rooms stay humidity-saturated year-round with condensation dripping from walls and pipes and occasional short-term flooding. Integral-type electromagnetic flow meters mount their transmitter right beside the pipe, so circuit boards suffer moisture corrosion, connectors loosen and displays fail - average service life drops sharply, and every replacement demands water and power shutdowns at high cost.

This solution deploys split-type electromagnetic flow meters to solve metering in harsh pump station environments. The sensor and transmitter are physically separated: the sensor installs close to the pipe, featuring a measuring tube injection-molded as one piece from aviation-grade long-glass-fiber reinforced composite LGF-PA66 - a weld-free structure that fundamentally eliminates the magnetic interference inherent in metal tube sections - with electrodes over-molded into the tube for excellent waterproofing and corrosion resistance, and IP68 protection for long-term operation in damp or even immersed conditions. The transmitter is wall-mounted in the dry, low-vibration duty room or electrical room, connected to the sensor by dedicated cable, keeping all electronics far from moisture and vibration and virtually eliminating humidity-related failures. Sizes DN25-DN300 with working pressure up to 4.0 MPa meter any conductive liquid above 50 uS/cm including two-phase media such as sewage, slurry and mining tailings, with 0.5% accuracy, long-term stability below 0.2% FS/year, and electrode materials of 316L, titanium, tantalum or platinum for corrosive duty. Outputs of 4-20 mA / RS485 / pulse (RS485 standard) feed RTUs or telemetry terminals, streaming data to the monitoring platform for pump station metering, pump efficiency testing and specific-energy-consumption analysis - a reliable data foundation for unmanned pump station operation.

Key Specifications at a Glance

DN25-DN300

Pipe Size Range

4.0 MPa

Max Working Pressure

0.5%

Accuracy Class

<0.2% FS/year

Long-Term Stability

IP68

Sensor Protection

>50 uS/cm

Min Conductivity

Split-Type Structure with IP68 Protection

The sensor and transmitter are physically separated, which is the core advantage of this split-type electromagnetic flow meter design. The split sensor is rated IP68 for stable operation in damp or immersed conditions, while the transmitter is mounted in a dry area away from moisture and vibration sources. This separation keeps all sensitive electronics far from the humidity and vibration that destroy integral-type meters in pump stations.

Aviation-Grade Composite Measuring Tube

The measuring section is injection-molded as one piece from LGF-PA66 long-glass-fiber reinforced composite. The weld-free process fundamentally eliminates magnetic interference inherent in metal tubes, and the seamless sensor-tube structure rules out leakage. Electrodes are over-molded into the tube for excellent waterproofing and corrosion resistance, ensuring reliable performance even in the most demanding pump station conditions.

High Accuracy and Long-Term Stability

The meter delivers a standard 0.5% accuracy class with long-term stability below 0.2% FS/year and sensitivity temperature drift of ±1.5% FS/degC. Proprietary transmitter algorithms ensure fast response with stable repeatability and linearity, providing dependable data for energy accounting and leakage analysis.

Wide Media Compatibility for Conductive Liquids

The split-type electromagnetic flow meter handles conductive liquids above 50 uS/cm, including two-phase media such as tailings, slurry and pulp. Multiple electrode materials are available to suit corrosive duties:

316L stainless steel for general water and wastewater applications
Titanium for oxidizing and aggressive media
Tantalum for highly corrosive chemical duties
Platinum for extreme corrosion resistance requirements

Modular Design for Easy Maintenance

Modular excitation coils reduce winding deviation and can be replaced quickly. Dual waterproof sealing plus precision assembly ensure long service life, and independent transmitter mounting means electronics service never touches the pipeline - eliminating the need for water and power shutdowns during maintenance.

Flexible Networking and Output Options

The transmitter provides 4-20 mA, RS485 and pulse outputs with RS485 as standard. The sensor is powered by the transmitter (220 VAC / 24 VDC), connecting directly to RTUs, telemetry terminals and SCADA platforms with national-standard flange connections. Data streams to the monitoring platform for pump station metering, pump efficiency testing and specific-energy-consumption analysis - a reliable data foundation for unmanned pump station operation.

Technical Specifications Summary

Pipe sizes: DN25-DN300
Working pressure: up to 4.0 MPa
Accuracy: 0.5% class
Long-term stability: below 0.2% FS/year
Sensitivity temperature drift: ±1.5% FS/degC
Minimum conductivity: 50 uS/cm
Sensor protection: IP68
Electrode materials: 316L, titanium, tantalum, platinum
Outputs: 4-20 mA / RS485 / pulse (RS485 standard)
Power supply: 220 VAC / 24 VDC (sensor powered by transmitter)
Connection: national-standard flange

Typical Applications in Pump Stations

Water supply pump station inflow and outflow metering
Drainage pumping station flow monitoring
Pump efficiency testing and specific-energy-consumption analysis
Sewage, slurry and mining tailings measurement
Unmanned pump station operation with RTU and SCADA integration

? 参考来源

Product specification data provided by the manufacturer
Application notes for split-type electromagnetic flow meters in pump station environments

Approach

How we implement intelligence into your infrastructure step by step.

Site survey and measuring point planning

Survey pump station pipe sizes, media types and conductivity, pressure and temperature duties, humidity and vibration distribution, installation space and straight-run conditions; determine size, electrode and liner configuration for every point plus transmitter location, documented in a one-station-one-file ledger.

Selection and installation design

Choose DN25-DN300 sizes by pipe diameter and verify flange rating against working pressure; select wear-resistant electrodes for sewage and slurry, titanium/tantalum/platinum for corrosive media; guarantee 10D upstream and 5D downstream straight runs, avoid peak-vibration points, wall-mount the transmitter in the dry low-vibration duty or electrical room, and route signal cables away from power cables with waterproof sealing.

RTU access and platform networking

Connect meters to RTUs or telemetry terminals via RS485 Modbus or 4-20 mA, configure sampling rates and transmission channels; upload flow data to the monitoring platform and link it with pump start/stop status and pressure data on the pump station operation view.

Metering verification and efficiency analysis setup

During commissioning, verify zero points and coefficients against a master meter or clamp-on ultrasonic reference; configure instantaneous/totalized flow, specific energy consumption, pump efficiency curves and NRW reports on the platform, and set minimum night flow alarms for leakage screening.

O&M management and spare parts strategy

Establish quarterly inspections of electrode fouling, cable sealing and transmitter moisture protection; modular transmitter design allows electronics-only replacement, so stocking one spare transmitter enables fast fault recovery, and historical metering data accumulates as the pump station energy-efficiency archive.

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Which flow meter suits reclaimed water pipelines? Is the LGF-PA66 right for recycled-water duty?

Can the LGF-PA66 be installed on rural PE plastic pipelines? How is grounding handled?

LGF-PA66 electromagnetic flow meter vs turbine flow meter: which one should I use for clean water?

How should I choose between the 0.2% and 0.5% accuracy versions of the LGF-PA66 electromagnetic flow meter?

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Split-Type Electromagnetic Flow Meter Solution for Pump Stations with High Humidity and Heavy Vibration