Brand: pFlow

pFlow E3 Compact WiFi Ultrasonic Heat Meter

Name: pFlow E3 Compact WiFi Ultrasonic Heat Meter – Datasheet
Brand: pFlow

Description

Overview

The pFlow E3 is an all-in-one compact ultrasonic heat and flow meter engineered for fast, low-hassle installation across HVAC, energy audit, and building automation applications. Using Time Comb Technology to measure signal flight time, the pFlow E3 clamps onto the pipe in four steps through six mounting screws, requires no pipe cutting and no system shutdown, and delivers ±2% accuracy across a ±0.03–5 m/s velocity range spanning seven standard pipe sizes from DN20 to DN80.

As the official authorized partner and exclusive regional representative for pFlow Gentos, Seven Star LLC proudly supplies the pFlow E3 across the Sultanate of Oman and the wider GCC, complete with calibration documentation and local engineering support. Our instrumentation division in Muscat supports energy-audit and building automation projects throughout Oman’s commercial sector, including developments in the Sohar and Salalah economic zones.

Measurement Principle of the pFlow E3

The pFlow E3 measures flow using Time Comb Technology, a refined transit-time approach that resolves the flight time of an ultrasonic signal across the pipe with high stability even in compact, all-in-one transducer geometries. Clamp-on transducers couple externally to the pipe wall, sending signals through the liquid without physical contact with the medium, so the instrument introduces no pressure drop and no risk of leakage at a process penetration.

Because the transducer and transmitter are integrated into a single compact enclosure with special outer insulation, the pFlow E3 reduces the practical hassle of field installation compared to split designs requiring separate transducer positioning and cable runs. The instrument pairs this flow measurement with PT1000 temperature sensors to calculate thermal energy directly, making it a genuine heat meter rather than a flow-only instrument requiring external BTU calculation.

Engineering Design of the pFlow E3

The pFlow E3 is housed in a PC/ABS enclosure rated IP54, with a 1.44-inch LCD and three-key touch interface for on-site configuration. The instrument mounts through six screws directly onto the pipe span, with dedicated dimensional profiles published for PVC, carbon steel, stainless steel, and copper pipework across all seven supported pipe sizes, ensuring a precise mechanical fit rather than a generic clamp.

Connectivity is where the pFlow E3 distinguishes itself: alongside standard RS-485 Modbus and FUJI protocol support, it includes native WiFi communication as standard, with iCloud data storage and analysis management built in. Optional 4–20 mA and TTL outputs extend integration further, and dual PT1000 clamp-on or insertion temperature sensors provide the second measurement input required for heat metering, all powered from a 10–36 VDC supply at 500 mA.

Key Features

The following capabilities define the pFlow E3 and explain its selection for HVAC and energy-audit projects across the region:

Native WiFi communication as standard, with built-in iCloud data storage and analysis management, removes the need for a separate gateway or data logger.
All-in-one compact design with special outer insulation and six-screw mounting reduces field installation time and hassle compared to split transducer designs.
Dual PT1000 temperature sensor inputs enable direct thermal energy (BTU) calculation alongside flow measurement, making the E3 a true heat meter.
Clamp-on transducers install through the buckle mechanism with no pipe cutting and no shutdown, on pipe sizes from DN20 to DN80.
Multi-protocol output including WiFi, 4–20 mA, RS-485, OCT pulse, and relay supports both cloud analytics and legacy BMS integration from one instrument.
Support for FUJI and MODBUS protocols over RS-485 ensures compatibility with a wide range of existing building automation platforms.
Compatibility with PVC, carbon steel, stainless steel, and copper pipe materials, each with dedicated dimensional data, ensures an accurate mechanical fit on-site.
IP54-rated PC/ABS enclosure suits indoor plant rooms and protected mechanical spaces typical of HVAC and building automation installations.

Industrial Applications

The pFlow E3 is widely deployed in HVAC systems, building automation, and energy-audit projects, where its combined WiFi connectivity and dual-temperature heat metering give facility teams direct thermal consumption data without external BTU calculation hardware. Its clamp-on installation and compact form factor also make it a practical fit for RAS systems, electroplating process lines, and car-washing water recirculation, where fast retrofit installation and iCloud data access are valued over inline metering.

As the officially authorized partner for pFlow Gentos, Seven Star LLC distributes the pFlow E3 to industrial and commercial clients throughout Oman and the GCC, including energy-audit consultancies, building automation integrators, and facilities management firms working across the Sohar and Salalah economic zones. Our engineering team supports pipe-size selection, WiFi network integration, and PT1000 sensor placement for accurate heat metering from day one.

Technical Specifications

The complete technical specification of the pFlow E3 compact ultrasonic heat meter is detailed below:

Parameter	Specification
Model	pFlow E3
Flow Range	±0.098–16 ft/s (±0.03–5 m/s)
Accuracy	±2%
Pipe Size	DN20, DN25, DN32, DN40, DN50, DN65, DN80
Measuring Medium	Water
Pipe Material	PVC, Carbon Steel, Stainless Steel, Copper
Output	WiFi (standard), 4–20 mA (optional), RS-485 (optional), TTL (optional), OCT pulse, relay
Communication Interface	WiFi/TTL, RS-485/TTL, OCT/Relay, 4-20mA TTL; FUJI and MODBUS protocol support
Power Supply	10–36 VDC / 500 mA
Keyboard	3 touch keys
Display	1.44″ LCD
Ingress Protection	IP54
Transmitter Enclosure	PC/ABS
Operating Temperature	Transmitter: -10°C to 50°C; Transducer medium: 0°C to 60°C
Humidity	Up to 99% RH, non-condensing
Power Cable	Standard length 2 m
Temperature Sensor Cable	3.0 m, Ø5 six-core, standard length 2 m
Temperature Sensor Type	2 × PT1000, clamp-on or insertion, 0–100°C
Standard Model Code	E3-1-1-CP-030-PT1000-DN(pipe size)
Certification	ISO 9001, ISO 14001, CE
Place of Origin	Shenzhen, China

Request a Quote for pFlow E3 Compact WiFi Ultrasonic Heat Meter

To request a formal quotation for the pFlow E3, 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 pipe-size selection, WiFi network integration, and PT1000 temperature sensor placement for your HVAC or energy-audit project. 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	You are viewing this model
pFlow E3R LoRaWAN Heat Meter	Heat & BTU Energy Meters	View details
pFlow E3CL Clamp-On Thermal Energy Flow Meter	Heat & BTU Energy Meters	View details
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 E3 Compact WiFi Ultrasonic Heat Meter

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

01Does the pFlow E3 require a separate WiFi gateway or data logger?

No. The pFlow E3 includes native WiFi communication as standard, with built-in iCloud data storage and analysis management, so it connects directly to the cloud without a separate gateway device or local data logger.

02How long does installation take and does it require shutting down the system?

The pFlow E3 installs through a four-step clamp-on procedure secured by six screws, with no pipe cutting and no need to stop flow. Its all-in-one compact design with special outer insulation further reduces the practical hassle of field installation compared to split transducer designs.

03What pipe sizes and materials is the pFlow E3 compatible with?

The pFlow E3 covers seven pipe sizes from DN20 to DN80, with dedicated dimensional profiles for PVC, carbon steel, stainless steel, and copper pipework, ensuring a precise mechanical fit for each combination rather than a generic clamp.

04Can the pFlow E3 integrate with legacy BMS or SCADA systems as well as the cloud?

Yes. Alongside its standard WiFi and iCloud connection, the pFlow E3 supports optional 4-20 mA, RS-485, and TTL outputs with FUJI and MODBUS protocol compatibility, allowing it to feed both cloud analytics platforms and legacy building automation systems simultaneously.

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.