Endress+Hauser Proline Promass A 300 Coriolis Flowmeter
The Endress+Hauser Proline Promass A 300 is a compact single-tube Coriolis flowmeter designed for accurate measurement of the lowest liquid and gas flow rates. Its space-saving sensor and easily accessible transmitter make it suitable for demanding continuous process applications where accurate low-flow measurement, compact installation and flexible system integration are important.
The Promass A 300 uses the Coriolis mass flow measurement principle, providing direct mass flow measurement together with density, temperature and volume flow information. Its compact design is particularly suitable for applications involving very small quantities and limited installation space.
Accurate Measurement at Very Low Flow Rates
Promass A 300 is specifically designed for applications involving the smallest flow quantities. The sensor is available in nominal diameters from DN1 to DN4 (1/24 to 1/8"), with a measuring range up to 450 kg/h.
This makes the flowmeter suitable for applications where conventional flowmeters may have difficulty maintaining reliable measurement at extremely low flow rates.
Typical applications include:
Precision dosing
Chemical injection
Laboratory and pilot processes
Continuous process control
Small-flow gas measurement
Small-flow liquid measurement
Compact process skids
High-Accuracy Coriolis Measurement
The Promass A 300 provides accurate measurement of both liquids and gases. Maximum measurement errors include:
Liquid mass flow: ±0.1%
Liquid volume flow: ±0.1%
Gas mass flow: ±0.35%
Liquid density: ±0.0005 g/cm³
The device can measure mass flow, volume flow, corrected volume flow, density, reference density and temperature, allowing several process variables to be obtained from a single measuring point.
Compact Single-Tube Sensor
The Promass A 300 features a compact and lightweight single-tube sensor, helping minimize installation space.
Its self-drainable measuring tube is designed for reliable process operation across all available line sizes. The sensor is also resistant to corrosive ambient conditions and internal clogging, supporting reliable measurement in demanding industrial environments.
The wetted measuring tube is available in 1.4435 stainless steel (316/316L) and Alloy C22, depending on configuration.
High-Pressure Flow Measurement
Despite its small measuring size, Promass A 300 is designed for demanding pressure conditions.
The sensor supports process pressures up to 430.9 bar (6250 psi) and medium temperatures from -50 to +205 °C (-58 to +401 °F), depending on the selected configuration.
This combination makes Promass A 300 particularly useful for specialized process applications requiring very low flow measurement under high pressure.
Easily Accessible Proline 300 Transmitter
A major feature of Promass A 300 is its compact and easily accessible transmitter.
The transmitter uses a dual-compartment housing and provides access to process and diagnostic information through freely configurable I/O functions and fieldbus communication. It supports up to three I/Os, while the backlit display provides touch control and WLAN access. A remote display option is also available.
This configuration provides greater flexibility for commissioning, operation and integration into process control systems.
Flexible Connectivity and Digital Communication
Promass A 300 supports a broad range of digital communication technologies, including:
HART
PROFIBUS DP
PROFIBUS PA
FOUNDATION Fieldbus
Modbus RS485
PROFINET
EtherNet/IP
OPC-UA
Ethernet-APL
This extensive communication capability allows the flowmeter to be integrated into modern PLC, DCS and industrial automation systems.
Hygienic and Hazardous-Area Applications
Promass A 300 can be configured for demanding industrial and hygienic applications. Available approvals include 3-A and cGMP, while hazardous-area approvals include ATEX, IECEx, cCSAus, INMETRO, NEPSI and UK Ex, depending on the configuration.
This makes the instrument suitable for applications across chemical, pharmaceutical, biotechnology and other process industries.
Heartbeat Technology
The Promass A 300 incorporates Endress+Hauser Heartbeat Technology, providing integrated verification and diagnostic functions.
Heartbeat Technology helps users verify measurement performance and obtain device condition information without removing the flowmeter from the process. This supports preventive maintenance, measurement reliability and improved plant availability.
No Conventional Flow Conditioning Requirement
As a Coriolis flowmeter, Promass A 300 measures mass flow directly and does not rely on the same flow-conditioning principle as many conventional velocity-based flowmeters.
This supports space-saving installation, which is particularly valuable in compact process skids and equipment packages where straight pipe length and installation space are limited.
Typical Applications
The Endress+Hauser Proline Promass A 300 is suitable for:
Very low-flow liquid measurement
Very low-flow gas measurement
Precision dosing
Chemical injection
Continuous process control
Chemical processing
Pharmaceutical processing
Biotechnology applications
High-pressure flow measurement
Compact process skids
OEM process equipment
Laboratory and pilot plants
Density and process monitoring
Key Features
Single-tube Coriolis flowmeter
Designed for very low flow rates
Nominal diameter DN1–DN4
Measuring range up to 450 kg/h
Liquid mass flow accuracy ±0.1%
Gas mass flow accuracy ±0.35%
Liquid density accuracy ±0.0005 g/cm³
Process pressure up to 430.9 bar
Medium temperature up to +205 °C
Compact, lightweight sensor
Self-drainable measuring tube
Compact and accessible transmitter
Up to 3 I/Os
Touch display and WLAN
Remote display option
Extensive digital communication options
Heartbeat Technology
3-A and cGMP options
Multiple hazardous-area approvals
