YST Ultrasonic Clamp-on Flow Meter YST305SBWS1

Overview

The YST Ultrasonic Clamp-on Flow Meter YST305SBWS1 is a non-invasive, transit-time ultrasonic flow measurement system engineered for permanent installation on pressurized liquid pipelines. It operates on the principle of measuring the time difference between upstream and downstream ultrasonic pulse propagation through the fluid—enabling high-accuracy volumetric flow calculation without contact with the medium. Designed specifically for municipal water supply and drainage networks, industrial cooling circuits, and wastewater discharge monitoring, the YST305SBWS1 delivers stable, long-term performance under variable hydraulic conditions. Its clamp-on transducer architecture eliminates the need for pipe cutting, welding, or process shutdown during commissioning—making it ideal for retrofit applications where operational continuity is critical.

Key Features

• Non-intrusive measurement: Dual-sensor clamp-on configuration ensures zero pressure drop, no moving parts, and no risk of leakage or contamination—fully compliant with hygienic and hazardous-area constraints.
• Broad pipe compatibility: Supports nominal diameters from DN25 to DN2000 (1″ to 78.7″) across carbon steel, stainless steel, PVC, GRP, and cast iron pipes—secured via adjustable stainless-steel mounting straps with integrated acoustic coupling gel.
• Robust environmental resilience: Transducers rated IP68 withstand submersion, rain, dust, and freeze-thaw cycles; transmitter housing rated IP65 provides protection against outdoor splashing and industrial ambient conditions.
• Electromagnetic interference (EMI) mitigation: Integrated shielding and digital signal processing algorithms suppress noise from adjacent high-voltage lines, variable-frequency drives, and pump motors—ensuring measurement integrity in electrically noisy plants.
• Wide operating temperature range: Validated for continuous operation from −30 °C to +70 °C, supporting deployment in northern climates, rooftop installations, and thermally unstable industrial zones.
• Low-maintenance architecture: No wetted components, no calibration drift due to mechanical wear, and field-replaceable transducers—reducing total cost of ownership over multi-year service life.

Sample Compatibility & Compliance

The YST305SBWS1 is validated for homogeneous single-phase liquids with minimum sound velocity stability and acceptable acoustic attenuation characteristics. Compatible media include potable water, treated wastewater, glycol-water mixtures, cooling tower water, light hydrocarbons (e.g., diesel), and mineral-based lubricants—provided suspended solids content remains below 5% by volume and particle size does not exceed 100 µm. While not certified to ISO 4064 or MID for fiscal metering, the device meets functional requirements outlined in ISO/TR 11382 (ultrasonic flowmeter application guidelines) and supports data traceability aligned with GLP and GMP principles when deployed with audit-trail-enabled SCADA systems. Its analog and Modbus outputs facilitate integration into infrastructure monitoring platforms requiring compliance with IEC 61850 or IEEE 1377 (Standard for Utility Industry Metering Communication Protocols).

Software & Data Management

The YST305SBWS1 features an embedded microcontroller-based transmitter with local LCD display supporting real-time visualization of instantaneous flow rate (m³/h or L/min), cumulative volume (m³), average velocity (m/s), signal quality index (%), and diagnostic flags (e.g., low signal strength, transducer detachment). All parameters are accessible via front-panel navigation using intuitive Chinese-language menu structure—designed for field technicians with minimal instrumentation training. Configuration and firmware updates are performed via USB or RS485 interface using YST’s proprietary PC-based setup utility (Windows-compatible), which logs configuration history, timestamped calibration events, and alarm records. The Modbus RTU implementation conforms to standard function codes (03h/04h for reading, 06h/10h for writing), enabling seamless interoperability with third-party HMI, DCS, and cloud-based IIoT platforms. Optional data logging modules support SD-card storage of 30-day interval data at user-defined sampling intervals (1–3600 seconds), compliant with internal QA/QC record retention policies.

Applications

• Municipal water distribution: Real-time monitoring of district metering areas (DMAs), leak detection via night-flow analysis, and demand forecasting at branch points without service interruption.
• Industrial process cooling loops: Closed-circuit flow verification in HVAC chillers, compressor jacket cooling, and chemical reactor heat exchangers—especially where particulate-laden water or mild corrosion precludes inline sensor use.
• Wastewater effluent reporting: Continuous discharge monitoring at treatment plant outfalls per local environmental regulatory frameworks (e.g., China’s HJ 353–2019, EU WFD reporting thresholds).
• Energy management systems: Integration with building energy management systems (BEMS) or industrial energy audits to correlate thermal load with water circulation rates.
• Temporary validation and verification: Cross-checking against existing magnetic or vortex meters during commissioning or periodic metrological verification per ISO/IEC 17025 accredited procedures.

FAQ

Is the YST305SBWS1 suitable for custody transfer applications?
No—it is designed for industrial monitoring and process control, not fiscal metering. For revenue-grade measurement, consult calibrated inline electromagnetic or Coriolis meters certified to OIML R49 or ISO 4064.
Can it measure fluids with air bubbles or high particulate content?
It requires acoustically homogeneous media. Air entrainment >1% v/v or coarse suspended solids (>100 µm) may degrade signal-to-noise ratio and cause measurement instability.
What is the minimum required straight pipe length upstream/downstream?
For optimal accuracy, install with ≥10D upstream and ≥5D downstream straight run; however, the device includes advanced signal averaging algorithms that maintain ±2% reading accuracy even with as little as 3D upstream/2D downstream under laminar or mildly disturbed flow profiles.
Does it support HART protocol or wireless communication?
No—only 4–20 mA analog output and RS485/Modbus RTU are supported. HART or LoRaWAN/Wi-Fi variants are available upon OEM request but require separate hardware revision.
How often does it require recalibration?
Under stable installation and consistent fluid properties, no routine recalibration is required. Annual verification against a portable ultrasonic reference meter is recommended for critical monitoring points per ISO 5167 Annex F guidance.