FHF20 Series

FHF20 Thermal Gas Mass Flowmeter, based on the constant temperature differential principle and equipped with high-performance intelligent transmitters, directly measures gas mass without needing temperature or pressure compensation.

Left side of the FHF20	Front of the FHF20	Right side of the FHF20

Main Features

• Display：Four-row LCD for smart display of flow rate, cumulative amount, etc.

• Accuracy： ± 1%

• Range：100:1

• Explosion-proof cast aluminum housing

• High repeatability, high reliability, high precision, high stability

• Flexible installation, easy to mount and dismount, user-friendly

• 4 ~ 20mA, compatible with HART and RS485 communication.

• 20+ Global Certifications: CE, IECEx, SIL 2/3, API 670, and ISO 9001 compliance.

• 48-Hour Emergency Support: Worldwide technical response network.

• Multilingual Engineering Teams: Fluent in EN/JP for seamless collaboration.

• Extreme Environment Expertise: -200°C to 3000°C measurement solutions.

• High-Performance Materials: Hastelloy C276.

• Custom OEM/ODM Services: Rapid prototyping in 72 hours.

About F&V GROUP

F&V GROUP is a global industrial measurement company committed to delivering innovative, energy-efficient solutions for temperature, pressure, flow, and level applications. Established in 2021, the group unites strong international expertise with localized manufacturing and service capabilities.

Our journey began in 2011 with the founding of FVLUOKY in Wales, UK—a brand built on precision engineering and technological excellence. Over the years, FVLUOKY became a trusted name in industrial measurement across international markets.

To better serve the Asia-Pacific region, Fuyi Intelligent Instrument (Shanghai) Co., Ltd. was established in 2019, introducing FVLUOKY’s product lines to China with localized assembly, testing, and innovation. Fuyi products are fully certified (ISO, CE, TS, CPA) and tailored to regional industry needs.

With the formation of F&V GROUP in 2021, our brands were strategically integrated to accelerate global growth. By 2024, F&V had become a leading force in China and began expanding its footprint to international markets—bringing high-performance, sustainable measurement solutions to customers worldwide.

At F&V, we combine global innovation with local insight—driven by a commitment to quality, sustainability, and customer success.

Q: What certifications do your instruments have?

A: All our instruments carry international certifications including CE, IECEx, and SIL to ensure compliance with global standards.

Q: Can your instruments be used in hazardous environments?

A: Yes, we offer explosion-proof and intrinsically safe versions certified for use in hazardous areas (Zone 0/1/2).

Q: How often should instruments be calibrated?

A: We recommend annual calibration for most applications, with more frequent calibration (6 months) for critical processes or harsh environments.

Q: What is your product warranty period?

A: We provide a standard 24-month warranty, with extended warranty options available.

Q: Do you offer custom solutions?

A: Yes, we specialize in customized solutions tailored to specific process requirements, including special materials, ranges, and outputs.

Q: Do you provide installation and commissioning support?

A: We offer comprehensive technical support including installation guidance, commissioning assistance, and operator training.

Q: How do I troubleshoot instrument issues?

A: Our 24/7 technical support team can assist with troubleshooting, and we provide detailed manuals with diagnostic procedures.

Q: Can your instruments integrate with existing control systems?

A: Yes, our instruments are designed for easy integration with all major DCS, PLC, and SCADA systems.

Q: What maintenance is required for your instruments?

A: Our instruments are designed for minimal maintenance, with self-diagnostic features and easy-access components when service is needed.

Q: What industries do you typically serve?

A: Our instruments are widely used in oil & gas, chemical, power generation, water treatment, pharmaceutical, and food processing industries.

Q: How do I select the right instrument for my application?

A: Our application engineers can help you select the optimal solution based on your process conditions, media characteristics, and performance requirements.

Q: What measurement principle does the FHF20 use?

A: It uses the constant temperature difference principle.

Q: Does the FHF20 require external temperature and pressure compensation?

A: No, it measures gas mass directly without the need for external temperature and pressure compensation.

Q: What types of media can this flowmeter measure?

A: It can only measure gas.

Q: What are the requirements for the purity and condition of the gas being measured?

A: The gas needs to be dry and free of solid particles or liquids; the purity of the gas must be ensured.

Q: Are there any maintenance requirements related to gas impurities?

A: Yes, depending on the gas impurity level at the customer's site, the measuring elements may need regular cleaning.

Q: What are the accuracy options available for the FHF20?

A: The accuracy options are ±1% and ±1.5%.

Q: What makes the FHF20 convenient in terms of installation and use?

A: It is small in size, flexible in installation, easy to disassemble and assemble, and simple to use.