Heinrichs Messtechnik GmbH • Robert-Perthel-Straße 9 • 50739 Köln • Tel.: +49 (221) 49708-0 • info@heinrichs.eu
All-Metal Variable Area Flow Meter
- All-metal design
- High temperature versions up to 350 ° C
- Process pressure up to 600 bar
- Electronic transmitter
- Special materials e.g. Hastelloy or Monel
- PTFE – Lined
- Integrated heating jacket (optionally)
The BGN variable area flow meter is designed for reliable flow measurement of liquids, gases, and steam under demanding process conditions. Thanks to its robust all-metal construction, the instrument is particularly suitable for industrial applications involving high pressures, elevated temperatures, and harsh operating environments.
The measuring principle is based on the proven variable area technology. The instantaneous flow rate is directly indicated as volumetric or mass flow, ensuring accurate and reproducible measurement across a wide operating range.
Due to its rugged design, the BGN is especially suitable for applications in the chemical and petrochemical industries as well as in plant engineering and process engineering. Its durable construction ensures high operational reliability and long service life, even under severe operating conditions.
The wetted parts are available as standard in stainless steel, Hastelloy, or PTFE-lined designs, allowing the instrument to be used with aggressive and corrosive media. In addition, special materials such as Monel and the highly corrosion-resistant stainless steels 1.4439 / 1.4539 are available for applications requiring enhanced seawater resistance.
For process monitoring and integration into modern automation systems, the BGN can be equipped with various electrical accessories and output signals.
Applications
The BGN variable area flow meter is suitable for a wide range of industrial applications where robust construction, high process reliability, and dependable flow measurement are required. Thanks to its all-metal design and the availability of corrosion-resistant materials, the instrument is particularly well suited for demanding process conditions.
Chemical and Petrochemical Industry
In the chemical and petrochemical industries, precise flow measurement is essential for stable processes, high product quality, and safe plant operation. The BGN is ideally suited for aggressive, corrosive, or temperature-critical media and can be adapted to various process requirements through different material options.
Typical applications:
- Chemical dosing
- Acid and alkali applications
- Process monitoring
- Cooling and heating circuits
- Inert gas and purge gas measurement
Oil and Gas Industry
The oil and gas industry requires high pressure resistance, temperature stability, and operational reliability. The BGN enables dependable flow measurement of liquids, gases, and auxiliary media even under harsh operating conditions.
Typical applications:
- Process gas measurement
- Fuel gas and inert gas applications
- Lubrication and cooling circuits
- Measurement of auxiliary and operating media
- Plant and skid systems
Food and Beverage Industry
In the food and beverage industry, reliable and reproducible flow measurement is essential to ensure consistent product quality and stable production processes. Different material versions are available depending on the medium and process requirements.
Typical applications:
- Water and media supply systems
- CIP / SIP processes
- Dosing applications
- Cooling and temperature control circuits
Pharmaceutical and Process Industry
In pharmaceutical and process applications, precise dosing, high repeatability, and reliable process monitoring are crucial. The BGN can optionally be equipped with electrical limit switches and transmitters, allowing seamless integration into automation systems.
Typical applications:
- Dosing processes
- Media monitoring
- Utility systems
- Pure and auxiliary media measurement
Power Generation and Energy Industry
Thanks to its high temperature and pressure resistance, the BGN is also suitable for applications in power generation and energy systems.
Typical applications:
- Steam measurement
- Cooling water monitoring
- Auxiliary media measurement
- Boiler and process systems
With its robust construction, wide range of material options, and the possibility of integrating electrical accessories, the BGN provides a reliable solution for a broad variety of industrial applications. The instrument helps companies safely monitor their processes, reduce operating costs, and ensure high process stability even under demanding operating conditions.
Special features
- Robust all-metal design for demanding process applications
- Suitable for liquids, gases, and steam
- High resistance to pressure and temperature
- Accurate and reproducible flow measurement
- Long service life with minimal maintenance
- Ideal for harsh industrial environments
- Easy-to-read 90° scale
- Linear characteristic curve due to optimized float design
- Optional electrical limit switches and transmitters
- Wetted parts available in stainless steel, Hastelloy, or PTFE-lined designs
- Excellent resistance to aggressive and corrosive media
- Special materials such as Monel, 1.4439, and 1.4539 available
- High-temperature versions up to 350 °C
- High-pressure versions up to 600 bar
- Gas or liquid damping available
- Excellent heating solutions
- Drainage-run capability
- Differential pressure regulator available
Technical data
Flow Body
Flow Ranges
from 0.5…5 l/h up to 13,000…130,000 l/h water
Indication unit
Electrical Outputs
Measurement Accuracy
Certificates and Approvals
- ATEX / IECEx
- KCS (Korea)
- NEPSI (China)
- PESO (India)
- EMC Directive
- Pressure Equipment Directive
- SIL compliance

