Brand: pFlow

pFlow E5E Ultrasonic BTU Flowmeter for HVAC

Name: pFlow E5E Ultrasonic BTU Flowmeter for HVAC – Datasheet
Brand: pFlow

Description

Overview

The pFlow E5E Ultrasonic BTU Flowmeter is a high-precision energy meter engineered for thermal energy measurement in heating and cooling systems, combining ultrasonic flow measurement with temperature differential data from integrated PT1000 sensors. Unlike simpler BTU meters, the E5E can independently measure “cooling” and “heating” in both flow directions, making it a genuinely multi-purpose instrument for modern HVAC infrastructure and district energy networks.

As the official authorized partner and exclusive regional representative for pFlow Gentos, Seven Star LLC proudly supplies the E5E to district cooling operators, commercial building management teams, and industrial facilities across the Sultanate of Oman, Muscat, and the wider GCC. With Power over Ethernet (PoE) connectivity and MeterTube app compatibility, the E5E enables seamless remote monitoring and configuration, supporting the region’s shift toward connected, cloud-integrated building automation.

Measurement Principle

The pFlow E5E uses the ultrasonic transit-time method, in which acoustic pulses are transmitted between clamp-on or insertion transducers mounted on the pipe. The meter’s processor calculates the minute time differential between upstream and downstream signals to derive fluid velocity with high precision, achieving flow accuracy of ±1% and energy accuracy of ±2%. This flow data is then combined with the temperature differential measured by paired PT1000 sensors on the supply and return lines to compute real-time thermal energy consumption in both cooling and heating modes.

Because the E5E’s flow sensors mount externally via clamp-on or insertion methods rather than penetrating the pipe wall in-line, the measurement introduces no additional pressure drop and carries no risk of leaks at the sensing point. Advanced digital signal processing improves interference resistance, ensuring stable, repeatable readings even in electrically noisy plant rooms and central air conditioning circuits.

Engineering Design of the pFlow E5E

The pFlow E5E features an advanced modular design with standalone menu operation and an LCD backlight display, supporting pipe sizes from DN25 up to DN1200 depending on configuration. High-precision clamp-on or insertion flow sensors pair with clamp-on or insertion PT1000 temperature sensors, giving installers flexibility to match the sensor configuration to existing pipe access and mechanical constraints.

Power over Ethernet (PoE) supplies both power and data communication over a single cable, simplifying installation in mechanical rooms where running separate power and data lines would add cost and complexity. This single-cable design, combined with cloud data storage and compatibility with the MeterTube app, makes the E5E particularly well suited to building automation systems, chemical plants, and agricultural equipment where centralized energy monitoring is a priority.

Key Features

The pFlow E5E combines bidirectional thermal energy measurement with modern network connectivity. Core capabilities include:

Independent measurement of cooling and heating energy in both flow directions for genuine multi-purpose operation.
High-precision clamp-on or insertion flow sensors paired with PT1000 temperature sensors for accurate BTU calculation.
Flow accuracy of ±1% and energy accuracy of ±2%, suitable for reliable billing and monitoring applications.
Power over Ethernet (PoE) connectivity, delivering power and data communication over a single cable.
Compatibility with the MeterTube app and cloud data storage for remote monitoring and configuration.
Advanced modular design with standalone menu operation and an LCD backlight display.
Broad pipe size compatibility from DN25 up to DN1200 for both small commercial and large district-scale networks.
Digital signal processing technology that boosts interference resistance for stable readings in noisy plant environments.

Industrial Applications

The bidirectional measurement capability and PoE connectivity of the pFlow E5E make it well suited to district heating and cooling networks, commercial HVAC systems, and industrial process facilities across Oman. Chilled and cooling water circuits in central air conditioning systems benefit from the E5E’s ability to independently track cooling and heating loads, supporting accurate energy billing and system balancing in large commercial developments.

As the officially authorized partner for pFlow Gentos, Seven Star LLC distributes the E5E to building automation projects, chemical processing plants, and agricultural facilities throughout the Sohar and Salalah economic zones and the broader GCC region. Its cloud connectivity and MeterTube app support allow facilities management teams to monitor thermal energy consumption remotely across multiple properties, an increasingly important requirement for organizations managing large commercial and hospitality portfolios.

Technical Specifications

Full technical parameters for the pFlow E5E ultrasonic BTU flowmeter:

Parameter	Specification
Model	pFlow E5E
Measurement Principle	Ultrasonic Transit-Time with PT1000 Temperature Sensing
Flow Accuracy	±1% of measured value
Energy Accuracy	±2% of measured value
Compatible Pipe Sizes	DN25 to DN1200
Sensor Mounting	Clamp-on or Insertion (Flow and Temperature)
Communication	Power over Ethernet (PoE), Cloud / MeterTube App
Display	LCD Backlight, Standalone Menu Operation
Measurement Modes	Independent Cooling and Heating (Bidirectional)
Physical Architecture	Modular Design

Sensor Ratings and Environmental Limits

Physically the pFlow E5E is specified for a harder duty than the smaller clip-on meters in the same family. The transmitter uses a PC/ABS enclosure rated IP65, while the flow transducers are fully encapsulated to IP68, allowing them to survive wash-down, condensate run-off, and the chilled-water sweating that is unavoidable in Omani plant rooms through the summer months. The transducers work on fluid temperatures from 0°C to 80°C and the transmitter from –10°C to 50°C, across 0–99% relative humidity without condensation. Flow and temperature sensor cables are supplied at a standard 9 m length, and that cable allowance is what makes the DN1200 end of the size range practical in the field: the transmitter can be mounted at eye level on a wall or panel while the sensors clamp to a large chilled-water header several metres away.

Network Integration and Local Operation

Over its single Power over Ethernet run the pFlow E5E communicates using HTTP and MQTT, and this is the distinction that matters most when comparing it against conventional RS-485 BTU meters. MQTT publishes readings directly to a broker or cloud endpoint without a protocol gateway or a polling master, so a district cooling operator can bring dozens of substations onto a single dashboard over the building’s existing structured cabling rather than pulling a dedicated fieldbus trunk. Locally the meter is operated through a 20 × 2 character backlit LCD and a 16-key (4 × 4) keypad, giving full standalone menu access at the panel for technicians who need to verify totals without network access. Measured velocity spans 0.01 to 5.0 m/s with repeatability of 0.3%, while the transmitter and flow sensor weigh only 0.6 kg and 0.75 kg respectively, keeping wall-mounting hardware simple.

Request a Quote for pFlow E5E Ultrasonic BTU Flowmeter for HVAC

To submit a formal Request for Quote (RFQ), check current availability and lead time, or request complete technical datasheets for the pFlow E5E Ultrasonic BTU Flowmeter for HVAC, please contact the official instrumentation division at Seven Star LLC today. As the authorized partner for pFlow Gentos in Oman and the GCC, our engineers are ready to assist with commercial sourcing and PoE-connected thermal energy metering integration.

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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 E5E Ultrasonic BTU Flowmeter for HVAC

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

01Can the pFlow E5E measure both heating and cooling energy?

Yes. The E5E independently measures cooling and heating energy in both flow directions, making it a genuinely multi-purpose meter for central air conditioning and district energy systems.

02Does the E5E require pipe cutting or process shutdown to install?

The E5E uses clamp-on or insertion flow and temperature sensors, allowing installation without cutting the pipe. Insertion configurations require a brief tap for the sensor fitting, while clamp-on configurations avoid pipe penetration entirely.

03What pipe sizes is the pFlow E5E compatible with?

The E5E supports pipe sizes from DN25 to DN1200, covering everything from small commercial branch lines to large district-scale cooling and heating mains.

04How does the E5E connect to building management or cloud systems?

The E5E uses Power over Ethernet (PoE) to receive both power and data over a single cable, and is compatible with the MeterTube app and cloud data storage for remote monitoring and configuration.

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

Yes. Seven Star LLC is the officially authorized partner and exclusive regional representative for pFlow Gentos in Oman and the GCC, supplying genuine products with local technical support.