Images are representations only.
Description
Promass Q 300 provides the highest measurement accuracy for mass flow, volume flow and density. Being the preferred choice for custody transfer applications, it has also been optimized for liquid applications where entrained gas is known to be present. The compact transmitter offers high flexibility in terms of operation and system integration: access from one side, remote display and improved connectivity options. Heartbeat Technology enables safe processes.
Measuring principle operates independently of physical fluid properties such as viscosity or density
Highest measurement performance for custody transfer, density and under tough process conditions
Device properties
Mass / volume flow: measurement error ±0.05 % (opt.) (PremiumCal)
Density: measurement error ±0.1 kg/m³ (opt.)
High turndown due to low pressure loss/zero point
Compact dual-compartment housing with up to 3 I/Os
Backlit display with touch control and WLAN access
Remote display available
Features
Secured measuring quality – unmatched accuracy of mass flow, volume flow and density
Optimized performance for liquids with entrained gas – MFT (Multi-Frequency Technology)
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 Ethernet
Reduced complexity and variety – freely configurable I/O functionality
Integrated verification – Heartbeat Technology
Specifications
Specifications
Brand
Certifications & Approvals
CSA Hydrogen Compatibility %
Hydrogen Compatible up to 100% 
Hydrogen Compatible up to 30% 
Hydrogen Compatible up to 20% Sensor features
- Optimized performance for liquids with entrained gas – MFT (Multi-Frequency Technology)
- Fewer process measuring points – multivariable measurement (flow, density, temperature)
- Space‐saving installation – no in-/outlet run needs
- Mass flow: measurement error ±0.05 % (PremiumCal)
- Density: measurement error ±0.2 kg/m³
- High turndown due to low pressure loss/zero point
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
- Remote display available
Nominal diameter range
- DN 25 to 250(1 to 10")
Wetted materials
- Measuring tube: 1.4404 (316/316L); stainless steel for cryogenic applications
- Connection: 1.4404 (316/316L)
Measured variables
- Mass flow
- density
- temperature
- volume flow
- corrected volume flow
- reference density
- concentration
Max. measurement error
- Mass flow (liquid): ±0.10 % (standard), 0.05 % (option)
- Volume flow (liquid): ±0.10 %
- Mass flow (gas): ±0.25 %
- Density (liquid): +/-0.2 kg/m³ (standard), +/-0.1 kg/m³ (option)
Measuring range
- 0 to 2 400 000 kg/h (0 to 88183 lb/min)
Max. process pressure
- PN 100, Class 600, 63K
Medium temperature range
- Standard: –50 to +205°C (–58 to +401 °F)
- Option: –196 to +150 °C (–321 to +302 °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; stainless steel for hygenic transmitter design
Degree of protection
- IP66/67, type 4X enclosure IP69
Display/Operation
- 4-line backlit display with touch control (operation from outside)
- Configuration via local display and operating tools possible
- Remote display available
Outputs
- 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 output
Inputs
- Status input 4-20 mA input
Digital communication
- HART
- PROFIBUS DP
- PROFIBUS PA
- FOUNDATION Fieldbus
- Modbus RS485
- PROFINET
- PROFINET over Ethernet-APL
- 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)
Metrological approvals and certificates
- Calibration performed on accredited calibration facilities (acc. to ISO/IEC 17025) Heartbeat Technology complies with the requirements for measurement traceability according to ISO 9001:2015 – Section 7.1.5.2 a (TÜV SÜD attestation) MI-005 Liquids other than water (Hydrocarbons, Liquified gases, Cryogenic liquids) OIML R117 (Liquids other than water, Liquified gases, Cryogenic liquids) NTEP (Liquids other than water, Cryogenic liquids) MC (Liquids other than water, Cryogenic liquids)
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
Configure
Configure
Configuration for Endress+Hauser products is available directly on their website. Visit the link below to configure your Proline Promass Q 300 Coriolis flowmeter and generate your unique product number.
Submit a request for information form on this product page with the unique product number in order for our team to assist you faster. If you need assistance with an Endress+Hauser configurator, please contact our team.
Click here to access the Proline Promass Q 300 Coriolis flowmeter configurator.
Why Choose the Endress+Hauser Promass Q
Why Choose the Endress+Hauser Promass Q
Value Elements
- Premium Coriolis Accuracy
- The Promass Q is built for high-accuracy mass flow, volume flow and density measurement in demanding liquid applications.
- With PremiumCal, it offers mass flow accuracy up to ±0.05% and density accuracy up to ±0.2 kg/m³, making it a strong fit for custody transfer, batching and critical process control.
- Reliable Measurement with Entrained Gas
- Endress+Hauser Multi-Frequency Technology helps maintain measurement performance when liquid streams contain entrained gas.
- This helps reduce process interruptions, measurement errors and uncertainty in challenging real-world applications.
- Heartbeat Technology for Built-In Confidence
- Integrated Heartbeat Technology provides continuous diagnostics and supports in-situ verification without interrupting the process.
- This helps operators confirm meter health, simplify maintenance planning and reduce unnecessary downtime.
- More Process Insight from One Meter
- The Promass Q measures multiple variables, including mass flow, volume flow, density and temperature.
- This can reduce the need for separate instruments and gives operators better visibility into product quality and process performance.
Comparison vs. Next Best Alternative
- A Strong Turbine Meter Replacement Option
- Compared to a turbine meter, the Promass Q has no moving parts, which helps reduce mechanical wear, maintenance and long-term performance drift.
- It also does not require straight inlet or outlet runs, making it easier to install in tight skids, loading systems and retrofit applications.
- Because it measures mass flow directly and provides density and temperature from the same device, it can replace multiple measurement points while improving process visibility.
- More Than Standard Flow Measurement
- Unlike many traditional flowmeters, the Promass Q measures independently of fluid properties such as viscosity or density.
- It is especially valuable where accuracy, density measurement and repeatability matter more than basic flow indication.
- Strong Fit for Custody Transfer and Fiscal Metering
- The Promass Q is a preferred choice for high-value liquid measurement where small errors can create significant cost impact.
- Larger Promass Q versions with 4-tube technology are also designed for high-flow oil and gas applications, including duty meter, master meter and fiscal metering use.
Where Do I Use This Product and Why?
- Canadian Natural Gas Applications
- Use the Promass Q in natural gas processing and liquids measurement applications where accurate mass flow and density measurement are critical.
- Choose the Promass Q when you need premium Coriolis accuracy, reliable performance with challenging liquid streams, built-in verification and advanced diagnostics in one meter.
