Technical Specifications

Performance — Single Channel vs Dual Channel

Wall-Mounted Transmitter (Common to Both Models)

Transducer Options

All transducers feature IP68 waterproof protection with encapsulated design and double-shielded signal cables. Standard cable length: 9 m (30 ft). Maximum extension: Single Channel up to 305 m (1000 ft); Dual Channel up to 274 m (900 ft).

Optional: Energy Meter Function

Both single and dual channel models can function as an energy meter (BTU meter) when paired with the RTD module and PT1000 clamp-on temperature sensors. This enables continuous measurement of heat and cold consumption in:

• Central heating and hot water distribution pipelines
• Air-conditioning and refrigeration chilled water systems
• District energy networks and HVAC building management

Single Channel vs Dual Channel — Which Do You Need?

Both configurations use the same wall-mounted transmitter platform. The difference is in how many transducer pairs are installed on your pipe — and what that means for your measurement.

When to choose Dual Channel:

• The pipe diameter is large (DN500+) where flow profile asymmetry is more likely
• You need maximum measurement confidence for billing, revenue, or compliance
• The application requires HART protocol for integration with advanced asset management systems
• You want built-in redundancy — if one channel has a transient issue, the other continues measuring

When Single Channel is sufficient:

• Standard process monitoring where ±0.5% accuracy already exceeds requirements
• Budget-conscious installations that still need high accuracy
• Pipe sizes under DN500 where flow profiles are typically well-developed

What Makes This a “High Accuracy” Ultrasonic Flow Meter?

Not all ultrasonic flow meters deliver the same level of measurement accuracy. Many low-cost clamp-on meters on the market claim ±2% to ±5% accuracy under ideal conditions — and perform worse in real installations. This precision ultrasonic flow meter is engineered differently.

Three design features set it apart:

1. ±0.5% accuracy of reading — Not ±0.5% of full scale, but of the actual reading. This means the measurement stays proportionally accurate whether you are at 10% flow or 100% flow. The single channel delivers 0.1% repeatability; the dual channel adds path-averaging for enhanced stability in challenging flow profiles. This level of precision is critical for trade metering, process optimization, and energy billing applications where every percentage point affects cost.
2. Dual-path averaging (Dual Channel) — The dual channel model installs two transducer pairs on the same pipe. By averaging two independent acoustic paths, it compensates for flow profile asymmetry caused by bends, valves, or large pipe diameters — delivering more representative measurements where a single path would see only part of the flow profile.
3. Clamp-on non-invasive design with IP68 transducers — The encapsulated transducer design with double-shielded cables ensures long-term signal integrity. IP68-rated transducers operate reliably in wet, submerged, or harsh environments where exposed sensors would fail.

Want to understand the factors that affect ultrasonic flow meter accuracy? Read: How Accurate Are Ultrasonic Flow Meters?

How It Works — Transit-Time Measurement Principle

This wall mounted ultrasonic flow meter uses the transit-time difference method to measure the time it takes for ultrasonic waves to travel between two clamp-on transducers mounted on the outside of the pipe wall.

Here is how the measurement principle works:

• Two transducers are mounted on the pipe — one upstream and one downstream
• Each transducer alternately sends and receives sound waves through the liquid flows inside the pipe
• The signal traveling with the flow arrives faster than the signal traveling against the flow
• The meter calculates the time difference and converts it to flow velocity, then to volumetric flow rate

No moving parts. No contact with the fluid. No pressure drop. No wear. The clamp-on installation method means you never cut into the pipe — the transducers mount on the outside of the pipe wall, and ultrasonic waves pass through the wall material to reach the liquid.

Transducer Mounting Methods

The correct mounting configuration depends on your pipe size and material:

For a complete installation walkthrough, see: How to Install a Clamp-On Ultrasonic Flow Meter: Step-by-Step Guide.

Typical Applications

🔧 Trade Metering & Billing

The Challenge: Water utilities and energy companies need continuous, accurate flow measurement for billing and revenue metering. Every percentage of measurement error directly affects revenue or cost allocation.

Why This Meter: The ±0.5% accuracy and 0.1% repeatability exceed trade metering requirements for liquid flows in pipe sizes from DN25 to DN5000. The dual channel option provides additional measurement confidence for revenue-critical applications. Non-invasive clamp-on installation eliminates the need to shut down the pipeline for meter installation or replacement.

🔧 Industrial Process Control

The Challenge: Chemical plants, pharmaceutical facilities, and refineries need reliable flow metering for process control — often on stainless steel or specialized alloy piping carrying clean liquids at elevated temperatures.

Why This Meter: With transducers rated up to 130°C (TT03/TT05 models) and compatibility with stainless steel, carbon steel, and PVC pipes, this meter handles most industrial process fluids. The dual channel option with optional HART protocol provides advanced integration with DCS and SCADA systems. Standard 4-20mA and RS485 Modbus outputs also available.

🔧 HVAC Energy Metering

The Challenge: Building operators need to measure chilled water and hot water flow rates and thermal energy consumption for billing tenants, optimizing HVAC efficiency, or verifying system performance.

Why This Meter: Add the optional RTD module and PT1000 temperature sensors to convert this wall mounted ultrasonic flow meter into a clamp-on BTU energy meter. Measure heat and cold consumption without cutting into the piping — see: Key Applications of Clamp-On Ultrasonic BTU Meters.

🔧 Water Utility Monitoring

The Challenge: Municipal water networks need permanent flow monitoring at distribution nodes, pump stations, and treatment plant inlets/outlets — often on large-diameter mains where inline meters are prohibitively expensive.

Why This Meter: The DN25–DN5000 range covers virtually all distribution pipe sizes, including large-diameter trunk mains. The dual channel option is ideal for large pipes (DN500+) where flow profile asymmetry makes single-path measurement less reliable. Wall-mounted design provides permanent, continuous monitoring with IP65/IP68 protection for outdoor or underground installations. Optional bi-directional measurement capability detects reverse flows that indicate cross-connections or valve failures.

Can We Meet Your Requirements?

Our Capabilities & Boundaries

WHAT WE DO:

• Permanent wall-mounted clamp-on liquid flow measurement using transit-time technology for clean liquids
• Non-invasive installation — clamp transducers on the outside of any pipe from DN25 to DN5000
• Single channel or dual channel configurations for different accuracy/stability requirements
• Continuous monitoring with 4-20mA, RS485 Modbus, and optional HART output (Dual Channel) for SCADA integration
• Optional energy meter function with PT1000 sensors for heating/cooling BTU measurement
• High-temperature applications up to 130°C with TT03/TT05 transducers

WHAT WE DON’T DO:

• Gas or steam flow → Use our vortex flow meter for steam, or thermal mass flow meter for gas
• Slurries or high-solids fluids → Signal scatter from particles makes transit-time unreliable; select the electromagnetic flow meter instead
• Custody transfer at ±0.2% accuracy → This requires Coriolis technology
• Temporary or portable measurement → See our portable ultrasonic flow meter for field work and spot-checking

Installation Guide

The wall-mounted installation method for this clamp on ultrasonic flow meter high accuracy is straightforward. Because the transducers mount on the outside of the pipe, there is no pipe cutting, no welding, and no process shutdown required.

Straight Run Requirements

To achieve the specified ±0.5% measurement accuracy, adequate straight pipe runs upstream and downstream of the measurement point are essential:

D = pipe inner diameter. For more details, see: Pipe Requirements for Ultrasonic Flow Meter Installation.

Transducer Positioning

• Install on a horizontal pipe at the 3 o’clock or 9 o’clock position (pipe sides) to avoid air pockets at the top or sediment at the bottom
• On vertical pipes, install on an upward flow section to ensure the pipe is fully filled
• Apply coupling compound between transducers and pipe wall — eliminate all air gaps for clean signal transmission

The transmitter mounts on a nearby wall or panel with standard brackets. Signal cables (standard 9 m) connect the transmitter to the clamp-on transducers. For installations requiring longer cable runs, cables can be extended up to 300 m.

For a complete step-by-step guide, read: How to Install a Clamp-On Ultrasonic Flow Meter.

Ordering Information

Get Your Custom Quote in 24 Hours

At Soaring Instrument, we manufacture wall-mounted, portable, and insertion ultrasonic flow meters in-house. We’ll recommend the right configuration — single channel or dual channel, clamp-on or insertion transducers — based on your actual application, not just the product we happen to sell.

Tell us your pipe size, pipe material, medium type, temperature range, and whether you need standard monitoring or high-confidence measurement. Our engineering team responds with a technical recommendation and pricing within 24 hours.

Related Resources

• Wall Mount Ultrasonic Flow Meter: Built to Last with Metal & Color TFT
• The Complete Guide of Ultrasonic Flow Meter
• How Does a Transit-Time Ultrasonic Flow Meter Work?
• How to Install a Clamp-On Ultrasonic Flow Meter: Step-by-Step Guide
• How Accurate Are Ultrasonic Flow Meters?
• What Are the Essential Flow Meter Accuracy Standards?
• Inline vs Clamp-On Ultrasonic Flow Meters: Key Differences
• What Fluids Can Ultrasonic Flow Meters Measure?
• Clamp-On Ultrasonic Flow Meter Troubleshooting Checklist
• How to Troubleshoot Ultrasonic Flow Meter Signal Loss?
• What’s the Best Way to Maintain Your Ultrasonic Flow Meter?
• Flow Meter for Corrosive Liquids: Why Clamp-On Wins