pFlow is the measurement brand of Gentos Measurement & Control Co., Ltd., established in Shenzhen in 1993. One team develops the meters, builds and calibrates them, and helps fit them to your system.
The company’s own account of its history, as published on its company website and in its 2026 product catalog.
1993–2001
Building its own meters
The company starts out in industrial automation and the distribution of imported flow meters, then builds its own calibration rig and its own ultrasonic meters.
Established in Shenzhen as an industrial automation systems company.
Became the general distributor in China for a US maker of ultrasonic flow meters, entering the water and oil instrumentation markets.
Built its own liquid flow calibration rig, verified by the South China National Centre of Metrology, and began to develop, make and sell meters under its own brand.
The ultrasonic flow meter series passed new-product type evaluation at the National Institute of Metrology, China.
Certified to ISO 9001 and licensed to import and export.
2002–2010
Recognised for its technology
Automation projects for water plants, a patent on its calibration device and the first Picofly meters. The company takes the name it has today.
Qualified as a contractor for instrumentation and industrial control systems, and went on to carry out automation projects for nearly a hundred waterworks, wastewater plants and other water-treatment sites.
Granted an invention patent for a device that calibrates ultrasonic flow meters with real liquid.
Admitted to the Shenzhen Hi-Tech Industrial Park.
Took its present name, Gentos Measurement & Control, and was certified among Shenzhen’s first National High-Tech Enterprises. One of its ultrasonic flow meters was named a National Key New Product.
Developed Picofly technology and applied it to ultrasonic flow meters.
Its ultrasonic flow meters obtained the CE mark, and a science and technology appraisal rated Picofly as internationally advanced.
2011–2017
Picofly, proven and applied
University tests confirm Picofly’s picosecond timing. The company moves to Nanshan Ipark, shows its meters in Hannover and helps draft the national standard.
Tests at The Hong Kong Polytechnic University and Harbin Institute of Technology confirmed Picofly’s picosecond-level time measurement.
Received the Shenzhen Science and Technology Award (patent award). Its clamp-on ultrasonic flow meter was recognised as a Guangdong High-Tech Product.
Used Picofly to develop a refrigerant flow meter for a space station.
Moved into Nanshan Ipark, its home today, and completed a major research project on TDC (time-to-digital conversion) technology.
Exhibited at Hannover Messe with the compound multipath ultrasonic flow meter D348D plus and Smart Crystal F200.
D348D Plus→
Took part in drafting China’s national standard GB/T 35138-2017 for transit-time ultrasonic liquid flow meters, and developed an ultrasonic mass flow meter for aviation kerosene.
2018–2022
Meters go online
Product plus IoT: meters for air conditioning and water networks that report over the network, alongside new calibration equipment.
Set out its smart air-conditioning and smart water strategy: product + IoT.
Invited to the 23rd National Invention Exhibition and the BRICS Technology Development and Innovation Competition; won the Silver Award. Launched its smart air-conditioning meter and a central air-conditioning billing system.
Developed a servo-driven piston prover for flow calibration.
Developed a high-accuracy ultrasonic lubricating-oil flow meter for ships, and its IoT ultrasonic flow sensors.
2023–today
Small pipes and liquid cooling
New ranges for small pipes, for data-centre liquid cooling and for several pipes at once.
30th anniversary. Launched the flow control valve, the flow sensor and MeterTube, the smart water and energy metering solution with phone app and cloud platform.
Developed the MF series for small pipes: the MFCL and MFR measure DN10 and DN15 pipes, in data-centre liquid cooling, new-energy equipment and smart farming.
MFCL→MFR→
Launched the D series of CDU coolant monitors (D2, D3 and D5) for data-centre liquid cooling, and the QMF ultrasonic micro-flow sensor. The company’s products have now reached 110 countries and regions.
D2→D3→D5→
Developed the C6H ultrasonic flow sensor, which monitors several pipes at once.
C6H→
Engineering & manufacturing
Developed, built and verified by one team.
Product development, manufacturing, calibration and application support sit together, so the meter you specify is the meter that was tested.
Gentos · Shenzhen, China
01 · Develop
Product and application engineering
Engineers design the meters and help match each one to the pipe, the liquid and the connection on your site.
R&D centre · 2026 product catalog
02 · Build
Manufacturing and configuration
Meters are built and set up for the job: sensors, connection and settings.
03 · Verify
Calibration and quality documentation
Flow calibration and quality records. Ask for the documents that apply to your model and project.
Gentos has contributed to Chinese ultrasonic flow-meter standards, including JJG 1030-2007 and GB/T 35138-2017.
In plain words: these documents set out how ultrasonic flow meters in China are specified, installed and checked.
What these standards cover
JJG 1030-2007
Ultrasonic Flowmeters. China’s national verification regulation: how ultrasonic flow meters are checked against a reference.
GB/T 35138-2017
Measurement of fluid flow in closed conduits: ultrasonic transit-time meters for liquid. A national standard covering the measurement principle, performance, calibration, outputs and installation, for clamp-on and insertion sensors.
Certificates
As listed in the company’s 2026 product catalog. Ask for the certificate that applies to your model and project.
If your company would like to work with pFlow, tell us about your business and what you have in mind. We discuss the details of every partnership directly with you.
