Brand: pFlow

pFlow GFR Agricultural LoRaWAN Ultrasonic Flow Meter

Name: pFlow GFR Agricultural LoRaWAN Flow Meter – Datasheet
Brand: pFlow

Description

Overview

The pFlow GFR Agricultural Flow Meter is a clip-on ultrasonic instrument purpose-built for agriculture and irrigation applications, using LoRa communication and the optional LoRaWAN protocol to deliver ultra-remote, low-power, high-availability wireless data transmission. This communication technology transmits information at very low frequencies with low complexity and cost, making the GFR an ideal solution for field installations where running wired communication infrastructure is impractical.

As the official authorized partner and exclusive regional representative for pFlow Gentos, Seven Star LLC proudly supplies the GFR to agricultural cooperatives, irrigation contractors, and farm management operators across the Sultanate of Oman, Muscat, and the wider GCC. Its long transmission distance and no-wiring installation make it especially well suited to the dispersed field layouts typical of large-scale agricultural irrigation networks.

Measurement Principle

The pFlow GFR adopts the ultrasonic transit-time measurement principle, combined with patented flow algorithm technology to achieve accurate measurement of fluid flow in the pipe. The instrument delivers ±2% accuracy (0.3m/s to 5m/s) with 0.4% repeatability across a flow velocity range of 0.03m/s to 5.0m/s, giving irrigation managers dependable data for water allocation decisions.

The product features an all-in-one, clip-on structure design that is simple and convenient to install, requiring only four steps from start to finish. The installation process requires no contact with fluid media and no need to shut down the flow, allowing irrigation systems to remain operational throughout commissioning—a significant advantage during critical growing seasons.

Engineering Design of the pFlow GFR

The pFlow GFR supports LoRa communication with a maximum transmit power of 22dBm, operating reliably across a wide temperature range of -40°C to 85°C to withstand harsh outdoor field conditions. The device offers selectable LoRa frequency bands to match regional requirements, including EU868, US915, CN779, EU433, AU915, CN470, and AS923(HK), ensuring compatibility with LoRaWAN networks deployed across different countries and regions.

A 1.54-inch LCD color screen with 240×240 resolution rotates 360° for clear readings from any mounting angle, paired with three touch keys for straightforward field configuration. Beyond its wireless LoRa capability, the GFR also provides a standard RS485 interface with FUJI or MODBUS protocol support, giving installers flexibility to integrate via either wireless or wired communication depending on site infrastructure.

Key Features

The pFlow GFR combines long-range wireless connectivity with rugged clamp-on sensing for agricultural applications. Core capabilities include:

LoRa and optional LoRaWAN communication for ultra-remote, low-power, low-cost data transmission.
Selectable frequency bands (EU868, US915, CN779, EU433, AU915, CN470, AS923) for regional compatibility.
Easy installation with no pipe damage, no adjustment, and simple clip-on measurement.
360° rotation adjustable LCD color display screen for flexible field-reading angles.
No wiring required for wireless installations, with long transmission distance.
±2% accuracy across a flow velocity range of 0.03m/s to 5.0m/s.
Wide operating temperature range from -40°C to 85°C for demanding outdoor conditions.
Standard RS485 with FUJI or MODBUS protocol as a wired communication alternative.

Industrial Applications

The pFlow GFR is engineered specifically for agriculture and irrigation systems across Oman, where its LoRaWAN wireless capability enables monitoring of dispersed field flow points without running cable infrastructure across large farm areas. Beyond agriculture, the GFR’s long-range wireless design also serves water and wastewater management, HVAC systems, and environmental and carbon footprint monitoring programs.

As the officially authorized partner for pFlow Gentos, Seven Star LLC distributes the GFR to agricultural cooperatives, farm management companies, and rural water authorities throughout the Sohar and Salalah economic zones and the broader GCC region, supporting efficient, connected irrigation water management.

Technical Specifications

Full technical parameters for the pFlow GFR agricultural LoRaWAN ultrasonic flow meter:

Parameter	Specification
Model	pFlow GFR
Measurement Principle	Ultrasonic Transit-Time, Clip-on
Flow Velocity Range	0.03m/s to 5.0m/s
Accuracy	±2% (0.3m/s ~ 5m/s)
Repeatability	0.4%
Pipe Size	DN15, DN20, DN25, DN32
Pipe Material	Stainless Steel, PVC, Copper, PPR
Wireless Communication	LoRa / LoRaWAN, 22dBm Max Transmit Power
Wired Communication	RS485 (FUJI or MODBUS Protocol)
Display	1.54-inch LCD Color Screen, 360° Rotation
Operating Temperature	-40°C to 85°C
Enclosure Rating	IP54

Why Choose Seven Star LLC for LoRaWAN Irrigation Networks

Large farm sites in Oman’s interior often span kilometers between individual flow points, where the choice of LoRa frequency band can determine whether a meter actually reaches the farm’s gateway reliably. Seven Star LLC’s engineers confirm the correct regional frequency band configuration (EU868 being the common choice for GCC deployments) before the GFR ships, and advise on gateway placement to maximize transmission range across dispersed irrigation zones.

As the authorized regional partner for pFlow Gentos, we also help agricultural cooperatives plan mixed wireless-and-wired rollouts, using the GFR’s LoRaWAN capability for remote field points and its RS485 MODBUS interface for meters closer to a wired control room, and can coordinate bulk orders for wilayat-wide irrigation modernization programs across Oman and the wider GCC.

Request a Quote for pFlow GFR Agricultural LoRaWAN Ultrasonic Flow Meter

To submit a formal Request for Quote (RFQ), check current availability and lead time, or request complete technical datasheets for the pFlow GFR Agricultural LoRaWAN Ultrasonic Flow Meter, 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 long-range wireless irrigation flow metering integration.

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About brand

pFlow is a specialized global brand recognized for its high-precision ultrasonic flow measurement technology, particularly its advanced clamp-on sensing solutions. Seven Star LLC is the official authorized representative of pFlow (pFlow Gentos) in Oman, supplying pFlow instruments with manufacturer documentation and technical support. 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.

About pFlow: Company and Product Range

pFlow ultrasonic flowmeters are made by Gentos Measurement & Control Co., Ltd., based at Nanshan Ipark in Shenzhen, China. The company states that it was founded in 1993 and concentrates on ultrasonic flow measurement, heat and cooling energy metering and flow calibration equipment. It lists ISO9001, ISO14001 and CE among its certificates and took part in drafting the Chinese standards JJG1030-2007 and GB/T35138-2017 for ultrasonic flowmeters.

The range is built on transit-time ultrasonic measurement with clamp-on sensors fitted to the outside of the pipe. Fixed flowmeters shown by the manufacturer include the F3E, F3P and F5E, each offered with Power over Ethernet; the E3E, E5E and E3R are ultrasonic thermal energy meters. Wireless and specialised models include the GFR clip-on flowmeter with LoRaWAN and the GF-S-CL for immersion cooling, while the P118i and P117 are portable instruments.

Frequently Asked Questions

Why does the pFlow GFR use LoRa communication?

LoRa and optional LoRaWAN protocols enable ultra-remote, low-power, low-cost data transmission, ideal for agricultural irrigation sites spread across large field areas without existing wired infrastructure.

Does the GFR require pipe cutting or a shutdown to install?

No. The GFR uses an all-in-one clip-on design completed in four steps, requiring no contact with fluid media and no need to shut down the flow.

Which LoRa frequency bands does the GFR support?

The GFR supports selectable frequency bands including EU868, US915, CN779, EU433, AU915, CN470, and AS923(HK), matching regional LoRaWAN network requirements.

Can the GFR also be wired instead of wireless?

Yes. In addition to LoRa wireless communication, the GFR provides a standard RS485 interface with FUJI or MODBUS protocol support for wired integration.

Is 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.

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