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Company

The team behind pFlow.

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.

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Company
Gentos Measurement & Control Co., Ltd.
Brand
pFlow
Products
Ultrasonic flow and thermal energy meters
Founded
1993, Shenzhen
Address
12/F, Block A5, Nanshan iPark, 1001 College Road, Nanshan District, Shenzhen, China
Telephone
+86-755-26745561
Email
marketing@gentos.com.cn
Fax
+86-755-26745999
Website
www.pflow.com.cn (brand owner’s site)
International business
Managed by Gentos in Shenzhen

What we do

Four businesses. One measurement focus.

  1. 01

    Ultrasonic flow measurement

    Fixed and portable meters for liquid flow, clamp-on or insertion depending on the model.

    Flow meters →
  2. 02

    Thermal energy measurement

    Meters that add the supply and return temperatures to the flow, to measure heating and cooling energy.

    Energy meters →
  3. 03

    Flow calibration systems

    Systems for checking flow meters against a known reference flow.

    Discuss calibration needs →
  4. 04

    Water treatment & environmental automation

    Automation for water treatment and environmental projects, discussed project by project.

    Discuss a project →

Milestones

Thirty years of fluid measurement.

The company’s own account of its history, as published in its 2026 product catalog.

  1. Established in Shenzhen, the city of science and technology.
  2. Obtained the Building Automation Qualification Certificate.
  3. Completed the fuel test standard “Rockets Attitude Control” for China Aerospace.
  4. Developed Picofly technology and applied it to ultrasonic flow meters.
  5. Worked with The Hong Kong Polytechnic University and Harbin Institute of Technology to prove Picofly’s very fine time resolution.
  6. Exhibited at Hannover Messe with the compound multipath ultrasonic flow meter D348D plus and Smart Crystal F200.
  7. Ultrasonic mass flow measurement applied by the China Air Force.
  8. Developed smart air conditioning, smart water strategy and product + IoT.
  9. Invited to the 23rd National Invention Exhibition and the BRICS Technology Development and Innovation Competition; won the Silver Award.
  10. 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.
  11. Breakthrough in small-diameter measurement: the MFCL and MFR series measure DN10 and DN15 pipes with high precision.
  12. Expanded the portfolio with the D2, D3 and D5 CDU coolant monitor series for data-centre liquid cooling.

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.

Office park with glass towers and landscaped gardens in Shenzhen
Gentos · Shenzhen, China
  1. 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.

    Engineers at test benches and workstations in the R&D centre
    R&D centre · 2026 product catalog
  2. 02 · Build

    Manufacturing and configuration

    Meters are built and set up for the job: sensors, connection and settings.

  3. 03 · Verify

    Calibration and quality documentation

    Flow calibration and quality records. Ask for the documents that apply to your model and project.

    The four calibration rigs →
    Flow calibration facility with test pipework and an operator workstation
    Flow calibration

Calibration

Four rigs, one ageing test.

How the company checks its meters, as described in its 2026 product catalog. The photographs are shown at the size the catalog holds them.

Axial double-loop flow calibration rig: pipework loops with meters under test and a control cabinet

Axial double-loop flow calibration rig

Checks meters against a high-precision ultrasonic master meter. The rig is evaluated and certified by the national metrology authority every year.

Heat meter flow calibration system with a test bench and a temperature-controlled loop

Heat meter flow calibration system

Calibrates thermal energy meters (BTU, heat and cold), with the medium temperature held at 50 ± 5 °C.

DN100 axial flow calibration rig with a long test line holding several meters

DN100 axial flow calibration rig

Used for volume production: six flow meters are calibrated at the same time.

Weighing-method liquid flow calibration rig with a weighing tank and test line

Weighing-method liquid flow calibration rig

Calibrates by weighing the liquid, for flow meters from DN8 to DN80.

High-temperature ageing chamber

High-temperature ageing

At least 72 hours in a 55 °C environment: the company’s high-temperature ageing test.

Facilities

Where pFlow meters are made and tested.

Showroom Showroom Production Production Flow calibration systems Flow calibration systems Conference room Conference room
Where our meters work
  • Building management (BMS)
  • HVAC
  • Aquaculture
  • Energy audits
  • Water supply
  • Chemicals
  • District heating and power
  • Measurement and research institutes

Standards & quality

Experience in measurement standards.

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.

  • CE
  • ISO 14001:2015
  • ISO 9001
  • MSDS report
  • Lithium battery pack test report
  • Calibration certificate
  • Explosion protection certificate of conformity
  • EU type examination certificate
  • IECEx certificate of conformity
  • Measuring instrument approval certificate (P.R.C.)

Quality documents

Need quality-system or conformity documents? Request the documents applicable to your selected model and project.

Request quality documentation →

OEM & ODM

Built into your product, or developed with you.

Tell us your measurement goal, installation constraints and interface requirements. We can discuss OEM or ODM needs for your application.

OEM

Our meter, your product.

A pFlow meter supplied under your brand or built into your own equipment.

ODM

Developed around your needs.

A meter developed with you, starting from your measurement and interface requirements.

Distribution

Represent pFlow.

Talk to us about distribution partnerships in your region.

Send us Your measurement goal Pipe sizes and liquid Installation constraints Interface and data needs Expected quantities
Discuss an OEM or ODM project

Let’s talk about your measurement needs.

Connect with our team in Shenzhen about products, applications or a collaboration.

Contact Us