Technical Specifications

Performance

Wall-Mounted Transmitter

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: up to 300 m (1000 ft).

Optional: Energy Meter Function

The SR6100S-II can function as an energy meter (BTU meter) when paired with the RTD module and PT1000 clamp-on temperature sensors. Ideal for:

• HVAC chilled water and hot water circuits
• Central heating and district energy networks
• Building energy management and tenant sub-metering

What Is a Metal Color Screen Ultrasonic Flow Meter?

A metal color screen ultrasonic flow meter combines two important upgrades over standard LCD-based instruments: an all-metal housing for superior durability, and a color TFT display that shows flow data in a high-resolution, easy-to-read format even in bright industrial environments.

The SR6100S-II is built around a 320×480 color TFT screen with a 10-line menu display — a significant step up from the monochrome 4-line LCD found on most entry-level wall mount ultrasonic flow meters. The all-metal aluminum alloy casing provides:

• Excellent EMI shielding — aluminum conducts and dissipates electromagnetic interference more effectively than plastic housings, protecting measurement signals in electrically noisy plant environments
• Superior heat dissipation — the metal body acts as a passive heat sink, extending electronics lifespan in warm enclosures or outdoor installations
• Impact and vibration resistance — in pump rooms, mechanical rooms, and outdoor substations, the all-metal body withstands knocks and constant low-level vibration that can crack plastic cases over time
• Professional appearance — for customer-facing installations such as energy metering rooms and HVAC plant rooms, the metal-bodied instrument presents a more credible, permanent installation

The color TFT display shows instantaneous flow rate, accumulated totals (positive, negative, and net), flow velocity, signal quality, and system status simultaneously — without requiring the operator to navigate through menu pages to find key readings.

What Does the Color TFT Display Show on This Ultrasonic Flow Meter?

The color TFT ultrasonic flow meter display on the SR6100S-II presents all critical measurement data on a single screen:

Daily, monthly, and yearly totalized flow records are stored internally. The last 64 days and months of data, plus the last 6 years of annual totals, are accessible directly on the color screen ultrasonic flow meter display without connecting a laptop or external device.

For installations requiring data export, the optional 32 GB SD card module stores time-stamped flow logs at intervals as short as 1 second — useful for energy audits, billing disputes, and commissioning reports.

How Does a Wall Mount Ultrasonic Flow Meter Work?

This wall mount ultrasonic flow meter uses the transit-time difference method to measure flow rate in closed pipes. Here is how the measurement principle works:

• Two transducers are mounted on the outside of the pipe wall — one upstream, one downstream
• Each transducer alternately sends and receives sound waves through the liquid inside the pipe
• The signal traveling with the flow (downstream) arrives faster than the signal traveling against the flow (upstream)
• The meter measures the transit time difference, converts it to fluid velocity, then multiplies by pipe cross-section area to calculate volumetric flow rate

No moving parts. No contact with the fluid. No pressure drop. The clamp-on installation method means you never cut into the pipe — transducers clamp onto the outside of the pipe wall, and sound waves pass through the pipe material to reach the liquid. This is fundamentally different from Doppler flow meters, which rely on the Doppler effect from particles or bubbles in the fluid — the transit-time method works on clean, particle-free liquids where Doppler flow meters cannot.

Transducer Mounting Methods

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

HVAC Ultrasonic Flow Meter Applications

🔧 HVAC Energy Metering — Chilled Water & Hot Water

The Challenge: Building operators and HVAC engineers need to accurately measure chilled water and hot water flow rates for tenant energy billing, system efficiency verification, and HVAC optimization. Traditional inline meters require pipe cutting and process shutdown — a significant constraint in occupied buildings.

Why This Meter: The SR6100S-II is a purpose-fit HVAC ultrasonic flow meter. Clamp-on transducers install on existing pipe without cutting or draining the system. Add the optional RTD module and PT1000 clamp-on temperature sensors to convert it into a BTU energy meter that continuously measures heat and cold consumption. The color TFT display shows energy totals directly on the instrument — no separate energy management system required for simple sub-metering applications. Pipe size coverage from DN15 to DN1200 handles everything from fan coil unit branch lines to main chiller headers.

🔧 Water Treatment & Distribution

The Challenge: Water utilities and industrial water treatment plants need reliable flow measurement at pumping stations, treatment plant inlets, and distribution nodes — often on pipe sizes that make inline meters impractical.

Why This Meter: DN15–DN1200 coverage and clamp-on installation make this ultrasonic flowmeter suitable for most distribution and treatment plant pipe sizes. The all-metal IP65 transmitter handles outdoor and wet plant room environments. RS485 Modbus output integrates with SCADA and building management systems. The color screen display with clear signal quality indication helps operators verify installation quality on-site without test equipment.

🔧 Industrial Process Monitoring

The Challenge: Chemical plants, food & beverage facilities, and industrial cooling circuits need continuous flow measurement on stainless steel or specialty alloy piping — often without the ability to shut down the line for sensor installation.

Why This Meter: With high-temperature transducer options up to 180°C (TT02H) and insertion-type sensors (TT05) for acoustically difficult applications, the SR6100S-II covers most industrial water flow measurement scenarios. FPGA chip processing delivers stable readings even on pipes with minor scaling or coating. The ultrasonic flow meter with TFT display simplifies on-site parameter entry and diagnostics compared to meters with small monochrome screens.

🔧 Small-Pipe Applications (DN15–DN40)

The Challenge: Most clamp-on ultrasonic meters start at DN25 or DN50, leaving small-diameter pipes — common in pharmaceutical, food processing, and laboratory systems — without a non-invasive option.

Why This Meter: The TT02S and TT03S small-pipe transducers extend the SR6100S-II’s range down to DN15 (½ inch), enabling non-invasive flow measurement on branch lines, bypass circuits, and small process pipes where inline meters would cause significant pressure drop.

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, DN15–DN1200
• Non-invasive installation — clamp transducers on the outside of any pipe, no cutting or shutdown required
• Color TFT display with all-metal housing for demanding industrial and HVAC environments
• Continuous monitoring with 4–20mA, RS485 Modbus, optional HART/M-BUS for SCADA and BMS integration
• Optional BTU energy meter function with PT1000 temperature sensors for heating/cooling systems
• Small-pipe coverage down to DN15 with dedicated TT02S/TT03S transducers

WHAT WE DON’T DO:

• Gas or steam flow → Use our vortex flow meter for steam
• Slurries or high-solids fluids → Electromagnetic flow meter recommended
• Custody transfer at ±0.2% → Requires Coriolis technology
• Portable / temporary measurement → See our portable ultrasonic flow meter
• Pipes larger than DN1200 → See our high-accuracy SR6300S (up to DN5000)

Installation Guide

The wall-mounted installation for this color screen ultrasonic flow meter is straightforward. Because transducers clamp onto the outside of the pipe, there is no pipe cutting, welding, or process shutdown required.

Straight Run Requirements

To achieve the specified ±1% accuracy, adequate straight pipe runs upstream and downstream of the measurement point are essential:

D = pipe inner diameter. Avoid the following positions: 90° bends, tee junctions, expanding/reducing pipes, valves, and pumps within the straight run. 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 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 color TFT display shows real-time signal quality, allowing on-site installation verification without additional test equipment

The transmitter mounts on a nearby wall or panel with standard brackets. Signal cables (standard 9 m / 30 ft) connect the transmitter to the clamp-on transducers. For long cable runs, extension up to 300 m is supported.

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

Ordering Information