pFlow E3 Compact WiFi Ultrasonic Heat Meter
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 manufacturer warranty, calibration documentation, and local engineering support. Our instrumentation division maintains regional stock in Muscat and 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 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 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.
Related Products
pFlow is a specialized global brand recognized for its high-precision ultrasonic flow measurement technology, particularly its advanced clamp-on sensing solutions. At Seven Star LLC, we provide pFlow’s non-intrusive flow meters designed for demanding industrial environments, such as specialized shrimp processing facilities. These systems allow for accurate monitoring of water and fluid consumption without the need for pipe cutting or process interruption. Built to withstand corrosive conditions and ensure high hygiene standards, pFlow products like the P117 and GFCL series are essential for optimizing resource management and operational efficiency across the food processing and water treatment sectors in Oman and the GCC.
Click to view complete pFlow information.
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