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Proline Prosonic Flow G 300 ultrasonic flowmeter

Highly robust gas specialist for fluctuating conditions with compact, easily accessible transmitter

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Have questions about this product?

Proline Prosonic Flow G 300 ultrasonic flowmeter

Highly robust gas specialist for fluctuating conditions with compact, easily accessible transmitter

Get a quote

Benefits

  • Flexible device with user-definable gas mixtures for demanding measuring tasks
  • Maximum reliability even with humid or wet gas – sensor design insensitive to condensate
  • High-performance process control – real-time pressure- and temperature-compensated values
  • Efficient solution – multivariable, no pressure loss
  • Full access to process and diagnostic information – numerous, freely combinable I/Os
  • Reduced complexity and variety – freely configurable I/O functionality
  • Integrated verification – Heartbeat Technology

Integrated technologies

Heartbeat Technology
FLEXible answers to individual needs
Current product

Proline Prosonic Flow G 300 ultrasonic flowmeter

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  • High-end products
  • Highly functional and convenient

What is FLEX?

FLEX selections
Technical excellence
Simplicity
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Fundamental selection Meet your basic measurement needs
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Lean selection Handle your core processes easily
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Extended selection Optimize your processes with innovative technologies
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Xpert selection Master your most challenging applications
Variable
Manufacturer's warranty

Engineered for confidence

Our instruments are designed for long‑lasting performance, precise measurement, and dependable operation in demanding industrial environments. Each product includes a standard manufacturer’s warranty that reflects our commitment to quality and to the trust you place in our solutions.

Should a warranty case occur, the device will be assessed and the applicable remedy will be provided in line with the warranty terms – helping ensure a reliable and efficient resolution and supporting continued operation of your measurement point.

Request for extended warranty

If you require extended warranty coverage, simply contact your local Endress+Hauser representative. Our experts will advise you on the available options to match your application and risk profile, helping you protect your investment, reduce unexpected repair costs, and ensure reliable long‑term operation beyond the manufacturer's warranty period.

Learn more

Warranty terms apply

The manufacturer's warranty and extended warranty are subject to specific conditions. For full details, please refer to the locally applicable General Terms and Conditions (GTC), which can be found on the respective country page of our website.

Services by your side

Right‑first‑time commissioning, worldwide

Endress+Hauser’s qualified service engineers ensure your measurement devices are commissioned right the first time, delivering application‑aligned accuracy, regulatory compliance, and operational confidence from startup onwards, anywhere in the world.

Remote support you can trust wherever you operate

With Endress+Hauser Smart Support, you benefit from faster issue resolution, higher uptime, reliable global expertise across the entire product lifecycle – and lasting peace of mind.

Committed to long‑term, sustainable performance

With deep field expertise, harmonized processes, and continuous monitoring, we accompany you with comprehensive service offerings – from initial start‑up through instrumentation maintenance to process optimization – as a true lifetime partner delivering improved outcomes.

For additional information, please contact your local Endress+Hauser representative.

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24/7 customer portal

Personalized transaction space

Check prices and delivery times, save your favorite products, create quotes and place orders in just a few clicks and track deliveries at any time. With access to your complete order and quote history including all relevant documents you benefit from full transparency throughout the entire process.

Easy access to technical documentation

Select and download all technical documentation such as operating manuals, calibration certificates, approvals and CAD drawings conveniently bundled as a complete documentation package for your entire order or quote.

My Endress+Hauser – all in one place

My Endress+Hauser is your 24/7 connection to Endress+Hauser – in the office, in the field or on the go. It brings together transaction management, documentation and software downloads, knowledge base access, customer support, engineering tools and cloud‑based IIoT services helping you work easier, faster and more efficiently.

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Technology
Heartbeat Technology

Smart instrumentation through Heartbeat Technology

You want to increase plant performance and reduce costs? Our smart instrumentation portfolio with Heartbeat Technology offers in-depth device insight for more cost-efficiency and operational safety.

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Product information

Picture of ultrasonic flowmeter Proline Prosonic Flow G 300 / 9G3B - Highly robust gas specialist
Proline Prosonic Flow G 300
Specifications
Measuring / Application task Gas
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Description

For a wide range of gas applications Prosonic Flow G provides reliable flow measurement, even with wet gas and changing gas properties and compositions. A pressure-rated sensor housing with rupture disc limits safety risks. 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 compliance and process safety at all times.

Field of application
  • The measuring principle is unaffected by gas composition
  • Accurate measurement of natural and process gas in the chemical as well as oil and gas industries.

Device properties:

  • Direct measurement: flow, pressure & temperature
  • Wetted parts: titanium / 316L
  • Maximum measuring accuracy: 0.5 %
  • Compact dual-compartment housing with up to 3 I/Os
  • Backlit display with touch control and WLAN access
  • Remote display available
Benefits
  • Flexible device with user-definable gas mixtures for demanding measuring tasks
  • Maximum reliability even with humid or wet gas – sensor design insensitive to condensate
  • High-performance process control – real-time pressure- and temperature-compensated values
  • Efficient solution – multivariable, no pressure loss
  • Full access to process and diagnostic information – numerous, freely combinable I/Os
  • Reduced complexity and variety – freely configurable I/O functionality
  • Integrated verification – Heartbeat Technology
Downloads
Most downloaded
Technical Information (TI)
TI Proline Prosonic Flow G 300 Ultrasonic time-of-flight flowmeter
English version - 01/2024
Download
Operating Instruction (BA)
BA Proline Prosonic Flow G 300 Ultrasonic time-of-flight flowmeter
HART
English version - 01/2024
Download
Operating Instruction (BA)
BA Proline Prosonic Flow G 300 Ultrasonic time-of-flight flowmeter
Modbus RS485
English version - 01/2024
Download
The CAD Drawings will be available after the configuration.
All downloads
130 Downloads
Technical Information (TI)
Most downloaded
TI Proline Prosonic Flow G 300 Ultrasonic time-of-flight flowmeter
English version - 01/2024
Download
Operating Instruction (BA)
Most downloaded
BA Proline Prosonic Flow G 300 Ultrasonic time-of-flight flowmeter
HART
English version - 01/2024
Download
Operating Instruction (BA)
BA Proline Prosonic Flow G 300 Ultrasonic time-of-flight flowmeter
Modbus RS485
English version - 01/2024
Download
Device Parameter (GP)
GP Proline Prosonic Flow G 300 Ultrasonic time-of-flight flowmeter
Modbus RS485
English version - 01/2024
Download
Device Parameter (GP)
GP Proline Prosonic Flow G 300 Ultrasonic time-of-flight flowmeter
HART
English version - 01/2024
Download
Short Instruction (KA)
KA Flowmeter Proline Prosonic Flow G Ultrasonic time-of-flight sensor
English version - 01/2024
Download
Short Instruction (KA)
KA Proline 300 HART transmitter
with ultrasonic time-of-flight sensor
English version - 01/2024
Download
Short Instruction (KA)
KA Proline 300 Modbus RS485 transmitter
with ultrasonic time-of-flight sensor
English version - 01/2024
Download
Installation Instructions (EA)
EA Replacing the sensor, gasket for sensor and the pressure cell Prosonic Flow G 300, 500-digital
English version - 03/2024
Download
Installation Instructions (EA)
EA Replacing the electronics Proline 300, 500, 500-digital
English version - 09/2025
Download
Installation Instructions (EA)
EA Alteration with Display and operating module DKX001 Proline 300
English version - 03/2025
Download
Installation Instructions (EA)
Replacing the transmitter Installation Instructions Prosonic Flow 300
English version - 08/2019
Download
Installation Instructions (EA)
EA Alteration Display module to Display module with WLAN Proline 300, 400, 500, 500-digital
English version - 01/2024
Download
Installation Instructions (EA)
EA Protective Cover connection compartment Proline 300, 500, 500-digital
English version - 01/2024
Download
Installation Instructions (EA)
EA Replacing cover, O-ring cover, Interface gasket Proline 300, 500
English version - 01/2024
Download
Installation Instructions (EA)
EA Replacing the display module Proline 300, 500, 500-digital, DKX001–
English version - 01/2024
Download
Installation Instructions (EA)
EA Activating application packages, switching the I/O function, upgrading with additional I/O hardware Proline 300, 400, 500, 500-digital
English version - 01/2024
Download
Installation Instructions (EA)
Alteration pressure cell Prosonic Flow 300, 500-digital
English version - 04/2020
Download
Installation Instructions (EA)
EA Replacing Spare Parts CNG-, LNG-, LPGmass, Proline 100, 300, 400 Index C, 500, 500-digital
English version - 01/2024
Download
Installation Instructions (EA)
EA Replacing cover for remote display module, O-ring for cover Proline 300
English version - 01/2024
Download
Installation Instructions (EA)
EA Replacing the terminal connection Proline 300, 500, 500-digital
English version - 01/2024
Download
Installation Instructions (EA)
EA Replacing ISEM electronics module, ISEM extender, ribbon cable Proline 300, 500, 500-digital
English version - 01/2024
Download
Installation Instructions (EA)
EA Replacing the S-DAT Proline 300, 400, 500, 500-digital
English version - 03/2026
Download
Installation Instructions (EA)
EA Replacing RJ45-M12 Adapter Proline 300, 500, 500-digital
English version - 06/2023
Download

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Selection of compatible products

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Spare parts and accessories

Electronic
Electronic

ISEM electr.mod.,Prosonic Flow G 300/500

Electronic
Electronic
Order code XPD0048-
Drawing number 33
I/O module
I/O module

I/O module, slot 1, 300/500

I/O module
I/O module
Order code XPD0037-
Drawing number 34
I/O module
I/O module

I/O module, slot 2/3/4, 300/500

I/O module
I/O module
Order code XPD0038-
Drawing number 35
Display
Display

Display module, 300/500/DKX001

Display
Display
Order code XPD0031-
Drawing number 50
Spare parts and accessories
Picture of ultrasonic flowmeter Proline Prosonic Flow G 300 / 9G3B - Highly robust gas specialist
Proline Prosonic Flow G 300

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Configuration details
Picture of ultrasonic flowmeter Proline Prosonic Flow G 300 / 9G3B - Highly robust gas specialist
Proline Prosonic Flow G 300
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CAD Drawings
Configuration support

Unsure about configuration details?

Our experts can help, whatever stage your configuration is at.

Add your product to the cart and request a quote. Whether it is un-configured, partially configured, or fully configured, our experts will contact you to complete the configuration and provide your quote.

Have questions before you start?

Contact us

Spare parts and accessories

Electronic
Electronic

ISEM electr.mod.,Prosonic Flow G 300/500

Electronic
Electronic
Order code XPD0048-
Drawing number 33
I/O module
I/O module

I/O module, slot 1, 300/500

I/O module
I/O module
Order code XPD0037-
Drawing number 34
I/O module
I/O module

I/O module, slot 2/3/4, 300/500

I/O module
I/O module
Order code XPD0038-
Drawing number 35
Display
Display

Display module, 300/500/DKX001

Display
Display
Order code XPD0031-
Drawing number 50
Spare parts and accessories

Selection of compatible products

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