Endress+Hauser CNGmass DCI CNG Coriolis Flowmeter
The Endress+Hauser CNGmass DCI is a specialized Coriolis mass flowmeter for compressed natural gas (CNG) refueling applications. It is designed for accurate measurement of CNG during high-pressure natural gas refueling and can display the measured gas quantity directly on site.
Unlike conventional volumetric flowmeters, the CNGmass DCI uses the Coriolis measuring principle to directly measure mass flow. The measurement is largely independent of physical fluid properties such as viscosity and density, making it well suited for demanding CNG dispensing applications.
CNG Mass Flow Measurement
The CNGmass DCI is specifically designed for compressed natural gas measurement in high-pressure refueling systems.
It supports flow rates up to:
150 kg/min (330 lb/min)
with a maximum mass flow measurement error of:
±0.5% of batch.
This makes the instrument suitable for applications where accurate measurement of the quantity of CNG delivered during a refueling operation is important.
High-Pressure CNG Refueling
The CNGmass DCI is designed for demanding high-pressure gas applications and supports a maximum process pressure of:
350 bar (5080 psi).
This high pressure capability makes the flowmeter suitable for CNG filling stations, natural gas vehicle refueling systems and other high-pressure CNG dispensing applications.
A rupture disc is also available as an option to provide additional protection for high-pressure applications.
Coriolis Measuring Principle
The CNGmass DCI uses Coriolis mass flow measurement to determine the mass flow of compressed natural gas.
The measuring principle provides several advantages for CNG applications:
Direct mass flow measurement
Measurement largely independent of fluid density and viscosity
Simultaneous measurement of multiple process variables
No inlet or outlet straight-run requirements
Reliable measurement under high-pressure conditions
The instrument can measure mass flow, density, temperature, volume flow, corrected volume flow and reference density.
Space-Saving Installation
The CNGmass DCI has a compact design and does not require inlet or outlet straight pipe runs.
This allows the meter to be installed in compact CNG refueling systems where available installation space is limited.
The nominal diameter range is:
DN 8 to DN 25 (3/8" to 1").
Custody Transfer Measurement
The CNGmass DCI transmitter is available for custody transfer applications, making the instrument suitable for systems where the measured quantity of CNG is used for commercial transaction or billing purposes.
The device can also be supplied with calibration performed at accredited calibration facilities according to ISO/IEC 17025, supporting applications with higher metrological requirements.
On-Site CNG Quantity Display
The measured CNG quantity can be displayed directly on site.
The transmitter features a:
4-line backlit display with Touch Control
and can be operated externally, allowing users to access the instrument without opening the transmitter housing.
This is particularly useful for CNG dispensing systems where operators need immediate access to measurement information.
Flexible Communication
The CNGmass DCI provides flexible communication and output options for integration into CNG dispensing and control systems.
Available digital communication includes:
The transmitter also provides modular outputs including:
4–20 mA
0–20 mA
Pulse output
Frequency output
Switch output
Relay output
This allows the flowmeter to be integrated with fuel dispensers, PLC systems, control systems and data acquisition equipment.
Compact Transmitter Design
The CNGmass DCI features a robust, ultra-compact transmitter housing and can be supplied in either a compact or remote version.
Preconfigured device options also support faster commissioning and reduce setup effort during installation.
The transmitter provides automatic recovery of data for servicing, helping simplify maintenance and troubleshooting.
Wide Temperature Range
The CNGmass DCI supports a medium temperature range of:
-50 to +150 °C (-58 to +302 °F).
The standard ambient temperature range is:
-20 to +60 °C
with an optional range down to:
-40 to +60 °C.
Robust Wetted Materials
The measuring tube is manufactured from:
1.4435 (316L) stainless steel
while the process connection uses:
1.4404 (316) stainless steel.
The sensor housing is made from corrosion-resistant 1.4301 (304) stainless steel, while the transmitter housing uses powder-coated die-cast aluminum.
Hazardous Area Applications
Depending on the selected configuration, the CNGmass DCI is available with hazardous-area approvals including:
This makes it suitable for use in appropriately classified CNG and natural gas installations.
Typical Applications
The Endress+Hauser CNGmass DCI is suitable for:
CNG refueling
CNG filling stations
Natural gas vehicle refueling
High-pressure CNG measurement
CNG dispensing systems
CNG mass flow measurement
CNG custody transfer
Commercial CNG measurement
Natural gas fuel measurement
CNG process monitoring
High-pressure natural gas applications
Key Features
CNG Coriolis mass flowmeter
Designed specifically for CNG refueling
High-pressure natural gas measurement
Flow rate up to 150 kg/min
Maximum process pressure 350 bar
Mass flow accuracy ±0.5% of batch
Nominal diameter DN 8–25
Direct mass flow measurement
Measures mass flow, density, temperature and volume flow
No inlet/outlet straight-run requirement
Custody transfer version available
Accredited calibration according to ISO/IEC 17025 available
Compact transmitter design
4-line backlit display with Touch Control
Modbus RS485 and HART
Pulse/frequency/switch/relay outputs
Compact or remote transmitter versions
Optional rupture disc
ATEX / IECEx / NEPSI / JPN Ex approvals
316L measuring tube
IP67 protection
Suitable for high-pressure CNG refueling systems
