Pneumatic averaging
A common positive- and negative-pressure circuit feeds one DP transmitter. The complete supplied array uses an approved system coefficient.
Patented multi-point velocity-array measurement
Full-Section Matrix Flowmeters — Multi-Point DP Velocity-Array System
A patented multi-point differential-pressure array engineered for large circular pipes, rectangular ducts and gas-flow profiles that a single-point or single-bar probe may not represent.
Shizhong Full-Section Matrix Flowmeter
Image 1 of 3 · Auto-advances every 3.2 seconds
ONE ARRAY · THREE SIGNAL ARCHITECTURES
Choose the measurement architecture before finalizing the grid
A matrix array samples more of the section than a single probe, but pressure averaging is not automatically the same as arithmetic velocity averaging. Shizhong selects the signal architecture, grid, coefficient and acceptance method together so that the delivered calculation matches the actual duct and measurement objective.
Zoned averaging
Separate duct zones provide diagnostic visibility when the profile is asymmetric or the operating load changes substantially.
Multi-channel integration
Local velocities are calculated from individual DP channels and integrated with defined area weights for the strongest traceability.
Patented Shizhong architecture
Full-section sensing with integrated flow conditioning
CN212082473U covers the combination of an upstream flow conditioner, symmetric multi-branch positive-pressure array, downstream negative-pressure structure and centralized pressure connections. The patent establishes the structure; project performance remains tied to the supplied geometry and approved verification basis.
Standards boundary
Velocity-area principles—not a transferred ISO coefficient
ISO 3966:2025 informs Pitot-static velocity-area practice. ISO 16911-1/-2 supports stationary-source reference and automated measurement. Neither standard assigns a universal coefficient, accuracy or straight run to a proprietary matrix array, and ISO 5167 does not cover this product class.
Full-section gas-flow measurement engineered around the actual duct
The Shizhong Full-Section Matrix Flowmeter combines a multi-point sensing array with an integrated flow-conditioning structure to sample a broader area of the measuring section. Each system is designed around the actual duct geometry, upstream disturbance, gas properties, maintenance conditions and acceptance method. Project performance is established through an approved system coefficient, representative calibration or site correlation—not a universal coefficient transferred between installations.
Key design features
CN212082473U patented full-section sensing architecture
Broader two-dimensional section coverage than a single-point or single-bar probe
Circular and rectangular arrays engineered around the actual velocity profile
Low permanent pressure loss compared with full-bore restriction devices
Calibration-, site-correlation- and CEMS acceptance-ready documentation
Related Solutions
Power GenerationEngineered DP measurement for main and auxiliary steam, feedwater, cooling water, combustion air and flue-gas duties in power and boiler systems.MetallurgyRugged flow measurement for blast-furnace and coke-oven gas, combustion air, cooling water, oxygen-service utilities and severe steelmaking processes.Chemical & PetrochemicalApplication-specific DP primary elements for corrosive, viscous, crystallizing, solids-bearing and variable process streams, with materials and maintainability considered from the start.
Typical applications
01
Boiler primary-air, secondary-air, forced-draft and induced-draft systems
02
Flue-gas ducts for power, steel, cement and chemical plants
03
Large circular pipes and rectangular ventilation or process-gas ducts
04
Continuous gas-flow measurement with site traverse or project calibration
Final specifications are confirmed against process data, piping, material, pressure class, applicable code and metrology requirements.
ENGINEERING ANSWER UNITS
Application boundaries, selection and troubleshooting
These product-specific answers retain the source evidence, calibration limits and conditions where a different measurement route is preferable. Values that cannot be confirmed from the approved source remain subject to project review or pending field test; no unverified value is supplied here.
Machine-readable answer infrastructure: the same visible question and answer text is published as FAQPage JSON-LD to support page understanding and AI retrieval. Google discontinued FAQ rich results on 07 May 2026, so no rich-result display is promised.
Dataset v1.5.0; last reviewed 2026-08-24. Evidence IDs are retained in the translation dataset.
How does a matrix flowmeter differ from a single-point or single-bar probe, and when can it replace one?
Replacement: In a large-section duct, a matrix flowmeter can replace a single-point or single-bar probe that does not represent the section adequately. A grid of multi-point total-pressure and matched negative-pressure circuits provides zoned velocity information. Use it when: The duty is flue-gas CEMS, a large low-velocity duct, or boiler forced- or induced-draft air and the array, zones and supports must be designed from the sectional velocity distribution. Do not force the substitution when: Do not apply this flue-gas and duct CEMS matrix route to pipe liquids, steam DP measurement or small pipes.
COMPARISON REPLACEMENT · MEDIUM source confidence
When is a matrix flowmeter recommended, and when should another measurement route be compared?
Recommended application: Use a matrix route for flue-gas CEMS, large low-velocity ducts and boiler forced- or induced-draft air when a single-point or single-bar probe is not representative and a multi-point array can be designed from the velocity distribution and calibrated or site-compared. Prefer another route when: Do not apply a duct CEMS matrix route to pipe liquids, steam DP measurement or small pipes; compare a standardized primary element or another applicable product. Standards basis: HJ 75, HJ 76, GB/T 16157 and DL/T 2618, with ISO 3966:2025 and ISO 16911-1/-2 as references. GB/T 2624 does not apply; the approved calibration or site-comparison basis governs.
RECOMMENDATION COMPARISON · HIGH source confidence
What temperature and pressure can a matrix flowmeter handle?
Confirm by application. The historical product-family range of -100～850℃ requires material and mechanical review. Confirm pressure by application; pressure boundary, supports, connections and design code require review. The historical temperature sample is not an unconditional finished-product commitment.
TEMPERATURE PRESSURE · MEDIUM source confidence
What pipe and duct sizes are available for a matrix flowmeter?
Circular sections: 25—6000 mm. Rectangular sections: 50 × 50～4000 × 4000 mm, as the product-family engineering range. Final array count, zoning and support design are project-specific to the duct section and velocity distribution.
DIAMETER RANGE · HIGH source confidence
Which materials are available for a matrix flowmeter?
304 or 316L stainless steel is available. Duplex stainless-steel and nickel-alloy options require corrosion and mechanical review. Material selection must also account for flue-gas corrosion, erosion, temperature and the support structure.
MATERIALS LINING · MEDIUM source confidence
How is a matrix flowmeter calibrated, and how should historical accuracy samples be used?
Accuracy is ±0.5% after individual flow calibration and is stated only as covered by the certificate. Historical ±0.5%, ±1.0% and ±1.5% classes require an approved calibration or site-comparison basis. Standards basis: CN212082473U; HJ 75 / HJ 76; GB/T 16157; DL/T 2618; ISO 3966:2025 / ISO 16911-1/-2 as references. GB/T 2624 does not apply. Flue-gas and duct CEMS applications follow the HJ 75 / HJ 76 site-comparison requirements.
CALIBRATION ACCURACY · MEDIUM source confidence
What should be checked when matrix-flowmeter zones disagree, fluctuate or lose signal?
Symptom: Zoned readings disagree, the total fluctuates, or some points have no signal. Possible causes: Blocked probe pressure openings, blocked or leaking zoned impulse lines, displaced array supports or orientation, a changed velocity distribution, or an acquisition-channel or transmitter fault. Action: Check power, wiring and zero channel by channel, then leak-test and purge each zone and verify array position. Perform a site comparison to HJ 75, HJ 76 and the project plan if required.
TROUBLESHOOTING · MEDIUM source confidence
Related products
Lierba & Averaging Pitot FlowmetersShizhong Lierba™ combines a low-loss insertion probe with a proprietary anti-plugging pressure-opening concept, drainage-friendly geometry and engineered purge or online-service options for large pipes and difficult gases.Balanced Flow MetersPipeline, wafer and replaceable-core differential-pressure meters with an application-specific multi-hole primary element for compact industrial flow measurement.
Need full specifications?
Request a detailed datasheet with dimensional drawings, material certificates and ordering information for Full-Section Matrix Flowmeters.
Production and documentation schedules are confirmed in the quotation after technical review and drawing approval.
Ready to discuss your application?
Send your process data for an engineering review and a project-specific next step.
ISO 9001TS Licensed30+ PatentsSince 1989