pFlow D118i Universal Ultrasonic Flowmeter

Overview

The pFlow D118i is a universal transit-time ultrasonic flowmeter built for demanding water treatment and industrial process environments, covering an extraordinary pipe-size range from 25 mm up to 5000 mm. Built on ARM COMA processing with low-voltage broadband pulse transmission, the pFlow D118i delivers ±0.5% accuracy while remaining tolerant of the small air bubbles and suspended solids typically present in raw and process water — conditions that degrade the performance of less robust instruments.

As the official authorized partner and exclusive regional representative for pFlow Gentos, Seven Star LLC proudly supplies the pFlow D118i 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 large-diameter metering projects throughout Oman’s municipal water networks, desalination plants, and the Sohar and Salalah economic zones.

Measurement Principle of the pFlow D118i

The pFlow D118i measures flow using the transit-time ultrasonic principle. Wall-mounted transducer pairs alternately transmit acoustic pulses upstream and downstream through the liquid column. The pulse travelling in the direction of flow arrives fractionally sooner than the pulse travelling against it, and the resulting time differential is directly proportional to the average liquid velocity along the acoustic path — a relationship that holds true across the full 25–5000 mm pipe range the instrument supports.

Because the transducers clamp externally to the pipe wall rather than penetrating it, the pFlow D118i introduces no pressure drop, no moving parts subject to wear, and no risk of process contamination or leakage. This non-intrusive approach is what makes the instrument practical on very large-diameter municipal mains and industrial headers, where inline metering would require costly flanged spool sections and process shutdowns to install.

Engineering Design of the pFlow D118i

The pFlow D118i transmitter is housed in a die-cast aluminum, IP65-rated enclosure with a 4.7-inch TFT colour screen and a 24-key light-tactile keypad for full on-site configuration and diagnostics. The transducer assembly uses an encapsulated design rated IP68, connected via a standard 9-metre cable that gives installers substantial flexibility when the transmitter must be mounted away from the pipe run, such as inside a control cabinet or accessible wall location.

Onboard data logging is supported through a TF card slot recording up to 4 GB, with a configurable storage interval from 1 to 13,000 seconds, allowing long-duration unattended trend capture for commissioning or diagnostic work. The instrument accepts either 90–250 VAC or 10–36 VDC power, and outputs analog 0/4–20 mA, pulse (0–9999 Hz OCT), and relay signals alongside RS-232/RS-485 Modbus communication, giving integrators a full set of interfaces for legacy SCADA and modern digital systems alike.

Key Features

The following capabilities define the pFlow D118i and explain its selection for large-diameter and demanding-medium applications across the region:

• Exceptional pipe-size coverage from 25 mm to 5000 mm allows one instrument platform to span small process lines through to major municipal transmission mains.
• Accuracy of ±0.5% of measured value with 0.1% repeatability provides metering-grade confidence for custody transfer and water-loss auditing applications.
• ARM COMA processing with low-voltage broadband pulse transmission maintains stable readings even with entrained air bubbles or suspended solids present in the medium.
• Triple output configuration — analog 4–20 mA, pulse, and relay — alongside RS-232/RS-485 Modbus gives integrators flexibility across legacy and modern control architectures.
• Onboard TF card data logging up to 4 GB with configurable interval supports unattended long-term trend capture for audits and diagnostics.
• Universal power input accepting 90–250 VAC or 10–36 VDC simplifies specification across sites with different available supply voltages.
• Die-cast aluminum IP65 transmitter enclosure and IP68 encapsulated transducer withstand outdoor pump station and exposed plant-room environments.
• 4.7-inch TFT colour display with 24-key tactile keypad delivers clear on-site diagnostics without a separate commissioning laptop.

Industrial Applications

The pFlow D118i is deployed extensively in municipal water and wastewater management, where its very large pipe-size range makes it one of the few clamp-on instruments capable of metering transmission mains rather than only branch lines. Across Oman’s desalination and reverse-osmosis facilities, HVAC chilled-water headers in commercial towers, and process water networks in chemical, pharmaceutical, and food and beverage plants, the instrument provides reliable, non-intrusive flow data without the shutdown cost of inline metering. It is also increasingly specified for carbon footprint auditing and carbon-trading verification projects, where its accuracy class supports defensible energy and emissions reporting.

As the officially authorized partner for pFlow Gentos, Seven Star LLC distributes the pFlow D118i to industrial and municipal clients throughout Oman and the GCC, including utility operators, EPC contractors, and facilities management firms working across the Sohar and Salalah economic zones. Our engineering team supports pipe-size verification, transducer spacing calculations, and commissioning for both new installations and large-diameter retrofit projects.

Technical Specifications

The complete technical specification of the pFlow D118i universal transit-time ultrasonic flowmeter is detailed below:

Call To Action

To request a formal quotation for the pFlow D118i, 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 transducer spacing, pipe-size verification, and output configuration for your municipal or industrial water metering project. Submit an RFQ today and our team will respond with pricing, lead time, and a recommended configuration for your application.