pFlow E3CL Clamp-On Thermal Energy Flow Meter

Overview

The pFlow E3CL is a clamp-on ultrasonic thermal energy (BTU) flow meter engineered for precise heat measurement in energy monitoring and system optimization applications. Combining transit-time ultrasonic flow sensing with dual PT1000 temperature inputs, the pFlow E3CL resolves temperature differences from 2 to 50 K at 0.01°C resolution across pipe sizes DN20 to DN80, converting flow and thermal differential directly into BTU energy readings without external calculation hardware.

As the official authorized partner and exclusive regional representative for pFlow Gentos, Seven Star LLC proudly supplies the pFlow E3CL across the Sultanate of Oman and the wider GCC, complete with manufacturer warranty, calibration documentation, and local engineering support. Our instrumentation division maintains regional stock in Muscat and supports energy management and carbon-audit projects throughout Oman’s commercial and industrial base, including facilities in the Sohar and Salalah economic zones.

Measurement Principle of the pFlow E3CL

The pFlow E3CL measures flow using ultrasonic transit-time technology through clamp-on transducers, while a matched pair of PT1000 sensors independently measures supply and return temperature. The transmitter combines these two data streams to calculate real-time thermal energy transfer, expressed as BTU or kW, giving facility teams a direct energy-consumption figure rather than a flow reading that requires separate manual conversion.

Because the ultrasonic transducers clamp externally to the pipe wall, the pFlow E3CL introduces no pressure drop and no risk of leakage at a process penetration, while the non-invasive design allows installation on live pipework without cutting the line or stopping the system. This combination of accurate flow sensing and independent high-resolution temperature measurement is what makes the instrument suitable for BTU billing and energy-audit applications where measurement defensibility matters.

Engineering Design of the pFlow E3CL

The pFlow E3CL integrates transmitter and clamp-on transducer into a single all-in-one enclosure rated IP54, with a 1.44-inch colour LCD at 128×128 resolution and a four-key touch interface for on-site configuration and diagnostics. Two PT1000 clamp-on temperature sensors connect via standard Ø5 mm six-core cable at a 2-metre length, positioned on the supply and return lines to capture the temperature differential that drives the BTU calculation.

The instrument offers four selectable output combinations — OCT pulse plus relay, RS-485 plus relay, RS-485 plus OCT pulse, or RS-485 plus 4–20 mA — configured at the factory according to project requirements and confirmed on the instrument display. This flexibility allows the same core platform to match a wide range of BMS and energy-management system integration requirements without hardware changes. Power draws from a 10–36 VDC supply at 500 mA, and RS-485 communication supports both FUJI and MODBUS protocols.

Key Features

The following capabilities define the pFlow E3CL and explain its selection for BTU energy monitoring and carbon-audit applications:

• Direct BTU/thermal energy calculation from combined flow and dual-temperature measurement eliminates the need for separate energy-calculation hardware.
• Temperature difference resolution of 0.01°C across a 2–50 K range supports accurate low-delta-T energy metering in modern high-efficiency HVAC systems.
• Four selectable output configurations — OCT/relay, RS-485/relay, RS-485/OCT, or RS-485/4-20mA — match a wide range of BMS integration requirements from a single platform.
• Clamp-on ultrasonic transducers install on live pipework with no cutting and no shutdown, on pipe sizes from DN20 to DN80.
• Compatible with carbon steel, stainless steel, copper, and PVC pipe materials supports mixed-material retrofit projects.
• All-in-one IP54-rated enclosure with integrated transmitter and transducer simplifies mounting compared to split designs.
• Support for FUJI and MODBUS protocols over RS-485 ensures compatibility with established building automation platforms.
• Suited to carbon footprint, carbon audit, and carbon-trading verification projects requiring defensible BTU energy data.

Industrial Applications

The pFlow E3CL is deployed extensively in BTU energy measurement for HVAC chilled and heating water systems, where its dual PT1000 inputs and clamp-on flow sensing provide the accuracy needed for tenant energy billing and building-level consumption reporting. Across Oman’s commercial towers and hospitality developments, the instrument supports energy management and environmental monitoring programmes, while its accuracy class makes it a suitable fit for carbon footprint auditing, carbon assessment, and carbon-trading verification work.

As the officially authorized partner for pFlow Gentos, Seven Star LLC distributes the pFlow E3CL to industrial and commercial clients throughout Oman and the GCC, including energy-audit consultancies, facilities management firms, and pharmaceutical production water operators working across the Sohar and Salalah economic zones. Our engineering team supports temperature sensor placement, output configuration, and commissioning for accurate BTU energy reporting from day one.

Technical Specifications

The complete technical specification of the pFlow E3CL clamp-on thermal energy flow meter is detailed below:

Call To Action

To request a formal quotation for the pFlow E3CL, confirm current regional warehouse stock, or obtain the complete technical datasheet, contact the Seven Star LLC instrumentation division. As the authorized partner for pFlow Gentos in Oman and the GCC, we supply genuine factory-calibrated instruments with full manufacturer warranty, and our application engineers are available to advise on temperature sensor placement, output configuration, and integration with your energy management or BMS platform. Submit an RFQ today and our team will respond with pricing, lead time, and a recommended configuration for your application.