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 ensures compliance and process safety at all times.
Last Updates: 15/02/2021
● 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 fieldbuses
● Full access to process and diagnostic information – numerous, freely combinable I/Os and fieldbuses
● Integrated verification – Heartbeat Technology
● 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 flow: measurement error ±0.05 % (PremiumCal)
● Density: measurement error ±0.2 kg/m3
● 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
Product headline
Innovative specialist for challenging applications with a compact, easily accessible transmitter. Secured measuring quality – unmatched accuracy of mass flow, volume flow and density. Highest measurement performance for custody transfer, density and tough process conditions.
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.
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 25 to 100 (1 to 4″)
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): ±0.35 %
Density (liquid): ±0.2 kg/m³Measuring range
0 to 550 000 kg/h (0 to 20 210 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: – 20 to +60 °C (–40 to +140 °F)
Option:–40 to +60 °C (–40 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
IP69Display/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, Liquified gases, Cryogenic liquids)
OIML R117 (Liquids other than water, Liquified gases, Cryogenic liquids)
NTEP (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, NORSOKHygienic approvals and certificates
3-A, EHEDG, cGMP
Datasheet: Proline Promass Q 300 Technical Information
