Brand: pFlow

pFlow E3CL Clamp-On Thermal Energy Flow Meter

Name: pFlow E3CL Clamp-On Thermal Energy Meter – Datasheet & Quote
Brand: pFlow

Description

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 calibration documentation and local engineering support. Our instrumentation division in Muscat 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:

Parameter	Specification
Model	pFlow E3CL
Flow Velocity	0.1–16 ft/s (0.03–5.0 m/s)
Accuracy	±2% of measured value, velocity > 0.3 m/s
Pipe Size	DN20–DN80
Temperature Range	0–60°C
Temperature Difference Range	2–50 K
Temperature Resolution	0.01°C
Measuring Medium	Water
Pipe Material	Carbon Steel, Stainless Steel, Copper, PVC
Input Interface	2 × PT1000 clamp-on temperature sensor
Output Selections	OCT Pulse + Relay; RS-485 + Relay; RS-485 + OCT Pulse; RS-485 + 4-20mA
Communication Interface	RS-485; FUJI and MODBUS protocols
Power Supply	10–36 VDC / 500 mA
Keyboard	4 touch keys
Display Screen	1.44″ LCD colour screen, resolution 128×128
Operating Temperature	Transmitter: -10°C to 50°C; Transducer: 0°C to 60°C
Humidity	Relative humidity 0–99%, non-condensing
Ingress Protection	IP54
Transmitter	All-in-one
Transducer	Clamp-on
Cable	Ø5 six-core cable, standard length 2 m
Certification	ISO 9001, ISO 14001, CE
Place of Origin	Shenzhen, China

Request a Quote for pFlow E3CL Clamp-On Thermal Energy Flow Meter

To request a formal quotation for the pFlow E3CL, confirm current availability and lead time, 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 factory-calibrated instruments on request, 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.

Other Models in the pFlow E3 Ultrasonic Heat & BTU Meter Series Range

Seven Star LLC supplies models from the pFlow E3 Ultrasonic Heat & BTU Meter Series range in Oman and the GCC. Compare the related models below and request a quote for the one that matches your application.

Model	Category
pFlow E3 Compact WiFi Ultrasonic Heat Meter	Heat & BTU Energy Meters	View details
pFlow E3R LoRaWAN Heat Meter	Heat & BTU Energy Meters	View details
pFlow E3CL Clamp-On Thermal Energy Flow Meter	Heat & BTU Energy Meters	You are viewing this model
pFlow E3E Ultrasonic BTU Meter	Heat & BTU Energy Meters	View details
pFlow E3RO Ultrasonic Thermal Energy Meter	Heat & BTU Energy Meters	View details
pFlow E3W BTU Meter for Temperature Control	Heat & BTU Energy Meters	View details

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About brand

Clamp-on ultrasonic flow measurement is what pFlow does. The sensors strap to the outside of the pipe and measure liquid flow by transit time, so the line is not cut and nothing touches the fluid. The brand comes from Gentos, an instrument maker focused on ultrasonic flowmeters, flow sensors and heat and cooling energy meters.

Seven Star LLC is the pFlow agency for Oman and the GCC, listing pFlow ultrasonic flowmeters in fixed, portable and LoRaWAN versions, BTU meters and LoRaWAN flow control valves.

pFlow flowmeter families

Most of the listed models are compact clamp-on sensors grouped by pipe size and duty. The GF family (GFCL, GFR, GF-S-CL, GF-SH-CL for hot water and GF-GH-CL for immersion cooling) and the MF micro flowmeters (MFR, MFCL) serve cooling and process loops on small and medium pipes. The MP series are plug-and-play flow sensors, including the MP801 and a LoRaWAN version. The D116-BTU is a wall-mounted ultrasonic BTU meter, the P116 a portable flowmeter for surveys, and the F8 a fixed meter used in aquaculture. Gentos also builds the F3 series clip-on flowmeters, including a panel-mount version. The VC200-R is a LoRaWAN ball valve that works as a flow switch.

Where pFlow meters are used

The manufacturer documents use in liquid cooling for data centers and semiconductor plants, chilled and hot water metering in central air conditioning, water supply networks and irrigation, aquaculture, and utility lines in petrochemical and power plants.

Ordering a pFlow ultrasonic flowmeter: what we need

Clamp-on meters are selected from pipe data. Send the pipe outside diameter, wall thickness and material, any liner, the liquid and its temperature, the expected flow span and the straight pipe length available. Add the output you need (4-20 mA, pulse, Modbus, LoRaWAN) and the supply voltage. For BTU meters include the supply and return temperature span.

FAQ

Questions about the pFlow E3CL Clamp-On Thermal Energy Flow Meter

Answers from our engineering team on installation, compatibility and integration.

01How does the pFlow E3CL calculate BTU energy rather than just flow?

The pFlow E3CL combines ultrasonic transit-time flow measurement with two independent PT1000 temperature sensors placed on the supply and return lines. The transmitter calculates the temperature differential and combines it with measured flow to output real-time BTU or kW thermal energy directly, without external calculation hardware.

02What temperature resolution does the pFlow E3CL support?

The pFlow E3CL resolves temperature to 0.01 degrees Celsius across a temperature difference range of 2 to 50 K. This resolution is important for accurate energy metering in modern high-efficiency HVAC systems that operate with low delta-T design.

03What output configurations does the pFlow E3CL offer?

The pFlow E3CL is available in four output combinations selected at the factory: OCT pulse plus relay, RS-485 plus relay, RS-485 plus OCT pulse, or RS-485 plus 4-20mA. This lets the same core instrument match a wide range of BMS and energy-management integration requirements.

04Is the pFlow E3CL suitable for carbon audit or carbon-trading verification projects?

Yes. The pFlow E3CL is specifically listed for carbon footprint, carbon audit, carbon assessment, and carbon-trading applications, where its combined flow and temperature accuracy supports defensible thermal energy reporting for compliance and verification purposes.

05Is Seven Star LLC an authorized representative for pFlow products?

Yes. Seven Star LLC is the official authorized partner and exclusive regional representative for pFlow Gentos in the Sultanate of Oman and the wider GCC. All instruments are supplied as factory-calibrated units with calibration documentation, backed by local engineering support with selection and specification.