Endress+Hauser Proline Promass O 300 Coriolis Flowmeter
The Endress+Hauser Proline Promass O 300 is a robust high-pressure Coriolis flowmeter designed for premium-accuracy measurement of liquids and gases in demanding oil and gas applications. It is engineered for the highest process pressures and is fully suitable for offshore conditions, combining a high-strength Super Duplex sensor with a compact and easily accessible transmitter.
Promass O 300 provides accurate mass flow, volume flow, density and temperature measurement, while its multivariable measurement capability can reduce the need for additional process instruments. The Coriolis measuring principle operates independently of physical fluid properties such as viscosity and density.
High-Pressure Coriolis Flow Measurement
Promass O 300 is designed for applications requiring reliable flow measurement under extremely high process pressures.
The maximum process pressure reaches:
PN 250 / Class 1500
This makes Promass O 300 suitable for high-pressure oil and gas process lines, offshore facilities and other demanding industrial applications.
Premium Accuracy for Liquids and Gases
Promass O 300 provides high measurement accuracy for both liquid and gas applications.
Key measurement performance includes:
Liquid mass flow: ±0.10% standard
Liquid mass flow: ±0.05% optional
Liquid volume flow: ±0.10%
Gas mass flow: ±0.35%
Liquid density: ±0.0005 g/cm³
The optional ±0.05% liquid mass flow accuracy makes Promass O 300 suitable for applications where premium measurement performance is required.
Designed for Oil and Gas Applications
Promass O 300 is specifically developed for demanding oil and gas measurement applications.
Its sensor is designed to withstand severe process conditions and provides high resistance to stress corrosion cracking, an important consideration for offshore and high-pressure hydrocarbon applications.
Typical applications include:
Oil and gas production
Offshore oil and gas
Hydrocarbon measurement
High-pressure gas measurement
High-pressure liquid measurement
Gas processing
Offshore process systems
Process monitoring and control
Custody-related measurement applications, depending on configuration and approvals
Super Duplex Measuring Tube
The Promass O 300 measuring tube is manufactured from 25Cr Duplex / Super Duplex stainless steel, 1.4410 (UNS S32750).
The process connection is also available in 25Cr Super Duplex, 1.4410 (F53).
This material construction provides high mechanical strength and excellent resistance to corrosion and stress corrosion cracking, supporting reliable operation in demanding offshore and high-pressure environments.
Wide Measuring Range
Promass O 300 is available in nominal diameters from:
DN 80 to DN 250 (3 to 10")
The maximum measuring range reaches:
2,200,000 kg/h (80,850 lb/min)
This makes the instrument suitable for large-diameter process pipelines and high-capacity oil and gas flow measurement applications.
Multivariable Measurement
Promass O 300 can measure several important process variables from a single measuring point:
Mass flow
Volume flow
Corrected volume flow
Density
Reference density
Temperature
Concentration
The multivariable capability provides additional process information while helping reduce the number of separate measurement points required in the system.
Compact Transmitter with Flexible Access
The Promass O 300 transmitter features a compact dual-compartment housing with up to 3 configurable I/Os.
The transmitter provides:
Backlit display
Touch control
WLAN access
Remote display option
Flexible I/O configuration
Access to process and diagnostic information
The transmitter can be accessed conveniently from one side, making operation and maintenance easier in industrial installations where accessibility is limited.
Flexible System Integration
Promass O 300 provides flexible integration into modern process automation systems.
The transmitter supports numerous communication technologies and freely configurable I/O functions, allowing integration with:
PLC systems
DCS systems
SCADA systems
Plant monitoring systems
Asset management systems
The available connectivity includes modern Ethernet-based communication options, including Ethernet-APL, depending on configuration.
No Conventional Straight Pipe Runs
The Coriolis measuring principle allows Promass O 300 to be installed without conventional inlet and outlet straight pipe runs.
This simplifies piping design and can reduce the required installation footprint, which is especially valuable in compact offshore facilities and process skids.
High-Temperature Process Measurement
Promass O 300 supports demanding process temperature conditions.
The specified medium temperature range extends to approximately:
-40 to +205 °C (-40 to +401 °F)
The instrument is therefore suitable for high-temperature process applications in addition to its high-pressure capabilities.
Offshore and Marine Approvals
Promass O 300 is designed for demanding offshore and marine environments and is available with a broad range of approvals and certificates.
Depending on configuration, these include:
LR
DNV
ABS
BV
CCS
PED
CRN
AD 2000
NACE MR0175/MR0103
Material certificates
Hazardous-area approvals
The combination of Super Duplex construction, high-pressure capability and offshore approvals makes Promass O 300 suitable for demanding marine and oil and gas installations.
Heartbeat Technology
Promass O 300 incorporates Endress+Hauser Heartbeat Technology for integrated verification and monitoring.
Heartbeat Technology supports measurement verification, diagnostics and process reliability, helping users maintain measurement performance and improve confidence in critical flow measurement applications.
Typical Applications
The Endress+Hauser Proline Promass O 300 is suitable for:
High-pressure liquid flow measurement
High-pressure gas flow measurement
Oil and gas production
Offshore oil and gas
Hydrocarbon measurement
Gas processing
Offshore process facilities
High-pressure process pipelines
Large-diameter flow measurement
Density and concentration measurement
Process monitoring
Applications requiring high resistance to stress corrosion cracking
Key Features
High-pressure Coriolis flowmeter
Designed for oil and gas applications
Suitable for offshore conditions
Liquid mass flow accuracy up to ±0.05%
Gas mass flow accuracy ±0.35%
Liquid density accuracy ±0.0005 g/cm³
Measuring range up to 2,200,000 kg/h
Nominal diameter DN 80–DN 250
Process pressure up to PN 250 / Class 1500
Medium temperature up to +205 °C
25Cr Super Duplex measuring tube
High resistance to stress corrosion cracking
Compact transmitter with up to 3 I/Os
Backlit touch display
WLAN access
Remote display option
Ethernet-APL and other digital connectivity options
No conventional inlet/outlet straight pipe runs
Offshore and marine approvals
Heartbeat Technology
