Dongshen Electronics KanalisTT Series Transit-Time Ultrasonic Flowmeter

Overview

The Dongshen Electronics KanalisTT Series Transit-Time Ultrasonic Flowmeter is an engineered solution for non-intrusive, continuous open-channel flow measurement in irrigation canals, wastewater conveyance channels, and industrial effluent systems. Based on the transit-time difference principle, the instrument calculates average flow velocity by precisely measuring the time differential between upstream and downstream ultrasonic pulse propagation across the channel cross-section. This method eliminates mechanical wear, avoids flow obstruction, and ensures long-term stability under variable hydraulic conditions—including fluctuating water levels, turbulent surface profiles, and bidirectional flow events. Designed for deployment in trapezoidal, rectangular, or U-shaped channels with widths ranging from 0.3 m to 20 m, the KanalisTT system delivers traceable velocity data that—when integrated with pre-configured channel geometry and Manning’s or ISO 4359-compliant stage-discharge relationships—enables high-reproducibility volumetric flow computation.

Key Features

• Transit-time ultrasonic measurement architecture with dual-sensor transducer pairs mounted on opposing channel banks or integrated into a single-frame mounting structure
• Configurable acoustic path topology: supports up to 10 independent measurement paths, including parallel, diagonal, and crisscross configurations to mitigate spatial velocity profile distortion
• Real-time compensation for temperature-induced sound speed variation using integrated Pt100 RTD sensors
• Embedded microprocessor with onboard flow algorithm execution—no external PC required for primary data generation
• IP68-rated transducers and NEMA 4X enclosure for field-mounted electronics, rated for continuous operation in ambient temperatures from −20 °C to +60 °C
• Modbus RTU/ASCII and Modbus TCP communication protocols for integration into SCADA, DCS, or PLC-based monitoring infrastructures
• Internal data logging capacity (up to 12 months of 15-minute interval records) with optional SD card expansion

Sample Compatibility & Compliance

The KanalisTT is optimized for clean to moderately suspended-solids-laden water (up to 10,000 mg/L TSS), including municipal wastewater, agricultural runoff, and treated effluent. It is not intended for highly aerated, viscous, or sediment-laden flows where ultrasonic signal attenuation exceeds design thresholds. The system complies with IEC 61000-6-2 (immunity) and IEC 61000-6-4 (emission) electromagnetic compatibility standards. Its measurement methodology aligns with ISO 748:2021 (Measurement of liquid flow in open channels — Velocity-area methods) and supports traceability to national metrological standards when calibrated per ISO/IEC 17025-accredited procedures. Installation practices follow ISO 4359:2016 guidelines for open-channel flow measurement uncertainty estimation.

Software & Data Management

The KanalisTT includes embedded firmware with configurable averaging windows (1–300 seconds), automatic zero-drift correction, and alarm-triggered event logging (e.g., low signal-to-noise ratio, path failure, or out-of-range water level). A Windows-compatible configuration utility enables setup of channel geometry, flow equation coefficients, and communication parameters via USB or RS-485. All logged data are exportable in CSV format with UTC timestamps and metadata headers. For enterprise deployment, the device supports secure remote access through TLS-enabled MQTT or HTTP(S) endpoints—compatible with cloud platforms adhering to ISO/IEC 27001 information security frameworks. Audit trails, user role permissions, and electronic signature support meet GLP and GMP-aligned operational requirements where regulatory documentation integrity is mandated.

Applications

• Real-time irrigation water allocation and distribution efficiency analysis in large-scale agricultural networks
• Regulatory compliance monitoring of discharge volumes at municipal wastewater treatment plant outfalls
• Hydrological research in experimental catchments requiring long-term, unattended open-channel flow time-series
• Industrial process water balance verification in food & beverage, pulp & paper, and chemical manufacturing facilities
• Early detection of channel leakage or unauthorized abstraction via flow continuity anomaly detection

FAQ

What is the minimum and maximum channel width supported by the KanalisTT system?

The system is validated for installation in open channels with widths between 0.3 meters and 20 meters. Optimal accuracy is achieved when transducer spacing and path geometry are selected per ISO 748 Annex B guidance.
Does the KanalisTT require periodic recalibration?

While the transit-time principle is inherently stable, annual verification against a portable clamp-on reference meter or physical tracer dilution test is recommended per ISO/IEC 17025 quality management practice.
Can the system operate during reverse flow or surcharge conditions?

Yes—the multi-path architecture and bidirectional time-of-flight measurement enable reliable velocity sign detection and magnitude resolution under transient reverse flow; however, sustained surcharge (full pipe flow) invalidates open-channel assumptions and requires alternate instrumentation.
Is the device compatible with existing telemetry infrastructure?

Yes—it supports standard industrial protocols including Modbus RTU over RS-485, Modbus TCP over Ethernet, and optional 4–20 mA analog output for legacy analog SCADA interfaces.
How is sensor alignment verified during commissioning?

The onboard diagnostics include real-time signal amplitude, time-of-flight stability index, and path-specific SNR metrics—used in conjunction with laser alignment tools per manufacturer’s installation manual to ensure optimal acoustic coupling.