Promass O is designed for premium accuracy of liquids and gases at the highest process pressures in the oil and gas industry. The sensor is fully suitable for offshore conditions and resistant to stress corrosion cracking. With its compact transmitter Promass O 300 offers high flexibility in terms of operation and system integration: access from one side, remote display and improved connectivity options. Heartbeat Technology ensures process safety at all times.
● Maximum safety – highest resistance to stress corrosion cracking
● Fewer process measuring points – multivariable measurement (flow, density, temperature)
● Space-saving installation – no in/outlet run needs
● Full access to process and diagnostic information – numerous, freely combinable I/Os and fieldbuses
● Reduced complexity and variety – freely configurable I/O functionality
● Integrated verification – Heartbeat Technology
● Measuring principle operates independently of physical fluid properties such as viscosity or density
● For premium accuracy at highest process pressures, fully suitable for offshore conditions.
Device properties
● Measuring tube in 25Cr Duplex, 1.4410 (UNS S32750)
● Measuring tube in 25Cr Duplex, 1.4410 (UNS S32750)
● Nominal diameter: DN 80 to 150 (3 to 6″)
● Compact dual-compartment housing with up to 3 I/Os
● Backlit display with touch control and WLAN access
● Remote display available
Product headline
Robust high-pressure flowmeter with a compact, easily accessible transmitter. For premium accuracy at highest process pressures, fully suitable for offshore conditions.
Sensor features
Maximum safety – highest resistance to stress corrosion cracking. Fewer process measuring points – multivariable measurement (flow, density, temperature). Space-saving installation – no in/outlet run needs. Measuring tube in 25Cr Duplex, 1.4410 (UNS S32750). Process pressure up to PN 250 (Class 1500).
Transmitter features
Full access to process and diagnostic information – numerous, freely combinable I/Os and fieldbuses. Reduced complexity and variety – freely configurable I/O functionality. Integrated verification – Heartbeat Technology. Compact dual-compartment housing with up to 3 I/Os. Backlit display with touch control and WLAN access.
Nominal diameter range
DN 80 to 150 (3 to 6″)
Wetted materials
Measuring tube: 25Cr duplex (Super Duplex), 1.4410 (UNS S32750)
Connection: 25Cr duplex (Super Duplex), 1.4410 (F53)Measured variables
Mass flow, density, temperature, volume flow, corrected volume flow (API tables), reference density, concentration
Max. measurement error
Mass flow (liquid): ±0.10 % (standard), 0.05 % (option)
Volume flow (liquid): ±0.10 %
Mass flow (gas): ±0.35 %
Density (liquid): ±0.0005 g/cm³Measuring range
0 to 800 000 kg/h (0 to 29 400 lb/min)
Max. process pressure
PN 250, Class 1500
Medium temperature range
–40 to +205 °C (–40 to +401 °F)
Ambient temperature range
Standard: –40 to +60 °C (–40 to +140 °F)
Option: –50 to +60 °C (–58 to +140 °F)Sensor housing material
1.4404 (316L), highest corrosion resistance
Transmitter housing material
AlSi10Mg, coated; 1.4409 (CF3M) similar to 316L
Degree of protection
IP66/67, type 4X enclosure
Display/Operation
4-line backlit display with touch control (operation from outside)
Configuration via local display and operating tools possible
Remote display availableOutputs
3 outputs:
4-20 mA HART (active/passive)
4-20 mA WirelessHART
4-20 mA (active/passive)
Pulse/frequency/switch output (active/passive)
Double pulse output (active/passive)
Relay outputInputs
Status input
4-20 mA inputDigital communication
HART, PROFIBUS DP, PROFIBUS PA, FOUNDATION Fieldbus, Modbus RS485, Profinet, Ethernet/IP, OPC-UA
Power supply
DC 24 V
AC 100 to 230 V
AC 100 to 230 V / DC 24 V (non-hazardous area)Hazardous area approvals
ATEX, IECEx, cCSAus, NEPSI, INMETRO, EAC
Product safety
CE, C-tick, EAC marking
Functional safety
Functional safety according to IEC 61508, applicable in safety-relevant applications in accordance with IEC 61511
Metrological approvals and certificates
Calibration performed on accredited calibration facilities (acc. to ISO/IEC 17025)
Heartbeat Technology complies with the requirements for traceable verification according to ISO 9001:2008 – Section 7.6 a (TÜV attestation)
MI-005 Liquids other than water (Hydrocarbons)Pressure approvals and certificates
PED, CRN, AD 2000
Material certificates
3.1 material
NACE MR0175/MR0103, PMI; welding test acc. to EN ISO, ASME, NORSOK
Datasheet: Proline Promass O 300 Technical Information
