Brand: pFlow

pFlow D118i Universal Ultrasonic Flowmeter

Name: pFlow D118i Universal Ultrasonic Flowmeter – Datasheet
Brand: pFlow

Description

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

Parameter	Specification
Model	pFlow D118i
Flow Range	±(0.01–12) m/s
Accuracy	±0.5% of measured value
Repeatability	0.1%
Pipe Size	1″–200″ (25 mm–5000 mm)
Installation Method	Wall mount, clamp-on transducers
Output	Analog 0/4–20 mA (max load 750 Ω); Pulse 0–9999 Hz OCT; Relay max 1 Hz (1A@125VAC or 2A@30VDC)
Communication Interface	RS-232/RS-485, Modbus Protocol
Data Logging	TF card, up to 4 GB, interval 1–13,000 s
Power Supply	90–250 VAC @48–63 Hz or 10–36 VDC
Keypad	24 light tactile keys
Display	4.7-inch TFT colour screen
Operating Temperature	Transmitter: -10°C to 60°C; Transducer: -40°C to 80°C (standard)
Humidity	0–99% RH, non-condensing
Transmitter Enclosure	Die-cast aluminum, IP65
Transducer	Encapsulated design, IP68
Cable Length	Standard 9 m
Weight	Transmitter: 1 kg
Certification	ISO 9001, ISO 14001, CE
Place of Origin	Shenzhen, China

Request a Quote for pFlow D118i Universal Ultrasonic Flowmeter

To request a formal quotation for the pFlow D118i, 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 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.

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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 D118i Universal Ultrasonic Flowmeter

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

01What pipe sizes can the pFlow D118i measure?

The pFlow D118i covers an unusually wide range from 25 mm to 5000 mm (1 to 200 inches), making it one of the few clamp-on instruments capable of metering both small process branches and very large municipal transmission mains with a single platform.

02Does installing the pFlow D118i require cutting into the pipeline?

No. The pFlow D118i uses wall-mounted clamp-on transducers that couple externally to the pipe, requiring no pipe cutting, no flanged spool piece, and no process shutdown. This is a significant cost and downtime saving compared to inline metering, particularly on large-diameter municipal mains.

03Can the pFlow D118i handle water with air bubbles or suspended solids?

Yes. The instrument uses ARM COMA processing with low-voltage broadband pulse transmission specifically designed to maintain stable readings in liquids containing small amounts of entrained air or suspended solids, which are common in raw and process water applications.

04What output and communication options does the pFlow D118i support?

The pFlow D118i provides analog 4-20 mA output, pulse output, and relay output simultaneously, alongside RS-232/RS-485 communication with Modbus protocol support. An onboard TF card also logs data up to 4 GB, giving integrators multiple paths for both real-time control integration and offline trend analysis.

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.