If you are comparing Prowirl 200 F, D, R and O, the right choice is usually determined by flow range, pipe configuration, installation constraints and pressure rating—not by the model letter alone. In practical terms, F 200 is the versatile flanged configuration, D 200 is the compact wafer-style option, R 200 is designed around reduced line size and low-flow measurement, while O 200 is the high-pressure configuration. The final selection should always be checked against the actual process data and the applicable ordering code.
One important procurement detail comes first: 7F2B, 7D2B, 7R2B and 7O2B are older Prowirl 200 ordering versions. Endress+Hauser currently lists corresponding C versions, including 7F2C, 7D2C, 7R2C and 7O2C. If an EPC specification or replacement request contains a B-version code, verify the current successor, availability and exact configuration before issuing a purchase order.
For buyers, that distinction matters because “same product family” does not necessarily mean “same ordering code.”
| Prowirl 200 | Main configuration | Best starting point when... |
|---|---|---|
| F 200 | Flanged | You need a versatile inline vortex meter for standard process, steam or gas service |
| D 200 | Wafer-style | Compact installation or a cost-conscious wafer configuration is important |
| R 200 | Reduced line size | The process line is relatively large but the actual flow is low |
| O 200 | High-pressure flanged | High process pressure is the main mechanical constraint |
This is a selection shortcut, not a substitute for instrument sizing.
The important question is not:
Which Prowirl 200 model is the best?
It is:
Which configuration solves the biggest constraint in my process?
That difference is what makes the selection technically useful.
A common mistake in flow meter procurement is starting with the model number.
An engineer sees:
Prowirl 200 → DN100 → quotation request
and assumes the selection is almost finished.
It is not.
Before choosing the configuration, an experienced instrumentation engineer will normally ask:
Only after those questions are answered does Prowirl F 200 vs D 200 vs R 200 vs O 200 become a meaningful comparison.
Prowirl F 200 is the configuration to consider when the project needs a conventional flanged vortex flow meter and there is no overriding requirement for reduced-line measurement or extreme pressure.
The current 7F2C version is described by Endress+Hauser as a versatile vortex flow meter for liquids, steam and gases. Its current published nominal diameter range is DN15 to DN300, with maximum process pressure up to PN100 / Class 600 / 20K, depending on configuration.
The current F 200 also includes options for integrated pressure and temperature measurement, which can be useful where corrected volume, mass or energy calculations are required.
F 200 is a logical starting point when:
For steam applications, the current F 200 product information also highlights wet-steam detection capability for DN25 to DN300.
F 200 should not be selected simply because it is the “standard” option.
If your process operates at very low flow in a large pipeline, R 200 may be more appropriate.
If the process pressure is unusually high, O 200 may deserve consideration first.
If installation space and wafer-style mounting are the dominant constraints, D 200 may be more practical.
So F 200 is best understood as the versatile starting point, not the universal answer.
The Prowirl D 200 uses a wafer-style design.
The older 7D2B documentation describes it as a cost-effective wafer design available in compact or remote versions. The current 7D2C version continues the Prowirl D 200 product family.
This configuration becomes interesting when the mechanical installation matters almost as much as the measurement itself.
For example, a retrofit project may have:
In these situations, the engineer is not asking only:
“Which meter has the best accuracy?”
The more useful question is:
“Which meter can be installed without creating unnecessary mechanical work?”
That can affect shutdown planning, pipe modifications and commissioning effort.
Consider D 200 when:
This is an important distinction.
The connection arrangement is part of the engineering selection.
A wafer meter and a flanged meter may both measure the same process variable, but the installation requirements, mechanical interfaces and project standards can be different.
Therefore, D 200 vs F 200 is primarily an installation and piping decision before it becomes a price decision.
The Prowirl R 200 solves a different problem.
Imagine a DN150 process line.
The pipe is large, but the actual operating flow is relatively low.
Selecting a meter purely because the meter diameter matches the pipe diameter may not produce the most useful measuring range.
This is where the reduced-line concept becomes important.
The current Prowirl R 200 is specifically described as a vortex flow meter with reduced line size for measurements in the low-flow range. The current 7R2C configuration has published maximum process pressure of PN40 / Class 300 / 20K, depending on configuration.
The engineering logic is straightforward:
Large pipe ≠ automatically large measuring section.
The meter needs to operate within a suitable flow range, and reducing the measuring line can increase the flow velocity through the measuring section.
That is the reason R 200 exists.
R 200 deserves evaluation when:
The current R 200 information lists a liquid measuring range of approximately 0.2–540 m³/h and a steam/gas range of approximately 1.5–7,260 m³/h, with the actual range depending on the medium and operating conditions.
These numbers should not be treated as universal DN-by-DN sizing limits. The manufacturer itself specifies the range as medium-dependent.
That distinction is important when writing technical content because quoting a single “maximum flow” without the corresponding medium, pressure and temperature can be misleading.
This is one of the most important points for procurement engineers.
Suppose the process specification says:
Pipeline: DN150
That does not automatically mean:
Flow meter: DN150
The meter should be evaluated against:
Minimum flow → normal flow → maximum flow
rather than pipeline diameter alone.
This becomes particularly important for gases and steam because density changes with operating pressure and temperature.
A gas flow rate stated in Nm³/h, Sm³/h, actual m³/h or kg/h can represent very different physical conditions.
Therefore, before requesting a Prowirl 200 quotation, confirm exactly what the flow units mean.
| Parameter | Example |
|---|---|
| Fluid | Steam / air / natural gas / process gas |
| Minimum flow | ___ |
| Normal flow | ___ |
| Maximum flow | ___ |
| Operating pressure | ___ bar |
| Operating temperature | ___ °C |
| Line size | DN___ |
| Connection | Flanged / wafer |
| Pressure class | PN___ / Class ___ |
| Required output | 4–20 mA / HART / pulse |
| Communication | HART / PROFIBUS / FF / other |
| Hazardous area | Yes / No |
| Quantity | ___ pcs |
This gives a supplier enough information to perform a meaningful technical cross-check.
The Prowirl O 200 is the specialized choice when high process pressure becomes a major selection criterion.
The current Prowirl O 200 is described by Endress+Hauser as a specialist for applications with high process pressure and is available with maximum process pressure up to PN250 / Class 1500 / 40K, depending on configuration.
That makes the O configuration particularly relevant for demanding steam and gas applications.
The key point is that the O 200 should not be thought of simply as a “better” F 200.
It addresses a different engineering constraint.
The current O 200 documentation also lists measured variables including volume flow, mass flow, corrected volume flow, energy flow, heat-flow difference and temperature.
For an EPC or procurement team, this is the more useful comparison:
| Selection factor | F 200 | D 200 | R 200 | O 200 |
|---|---|---|---|---|
| Primary design focus | Versatile flanged measurement | Wafer-style installation | Low-flow / reduced-line measurement | High-pressure measurement |
| Typical connection concept | Flanged | Wafer | Reduced-line configuration | Flanged |
| Compact installation | Good | Strong | Good | Good |
| Low-flow focus | Standard sizing | Standard sizing | Primary focus | Standard sizing |
| High-pressure focus | Moderate, configuration-dependent | Configuration-dependent | Lower pressure class | Primary focus |
| Steam applications | Yes | Yes | Yes | Especially relevant for high pressure |
| Gas applications | Yes | Yes | Yes | Especially relevant for high pressure |
| Main engineering question | Does the standard configuration fit? | How do I minimize installation complexity? | Is my line too large for the actual flow? | Can the meter meet the pressure requirement? |
This table should be read as a selection framework, not as a replacement for the manufacturer's sizing software or final technical documentation.
For steam measurement, start with the process rather than the model.
You should know:
Prowirl F 200 — the conventional flanged configuration for general process applications.
Prowirl D 200 — a compact wafer-style configuration for space-constrained and replacement applications.
Prowirl R 200 — a reduced-line configuration for applications where low flow in a larger pipeline is the main sizing challenge.
Prowirl O 200 — a high-pressure configuration for demanding steam and gas applications.
The final choice still depends on the actual flow range and pressure/temperature conditions.
For example, current F 200 information gives a maximum process pressure of PN100 / Class 600 / 20K, while current O 200 information reaches PN250 / Class 1500 / 40K.
That is a meaningful engineering difference, not simply a model-number difference.
For cross-brand selection between Endress+Hauser Prowirl 200 and KROHNE OPTISWIRL 4200, see our
Gas measurement requires an additional step because pressure and temperature influence gas density.
Before selecting the meter, clarify whether the quoted flow is:
For example, 1,000 Nm³/h is not the same physical condition as 1,000 m³/h at process pressure.
Therefore, a gas RFQ should include:
gas composition + pressure + temperature + flow units + minimum/normal/maximum flow.
For high-pressure gas service, O 200 may become particularly relevant because its configuration is specifically intended for demanding high-pressure applications.
For a large line with relatively low actual flow, R 200 should also be evaluated because its design addresses reduced-line measurement in the low-flow range.
A common procurement mistake is comparing only one specification:
“Accuracy: ±1%.”
That is not enough.
A professional technical review should examine at least these areas.
Check minimum, normal and maximum flow.
The question is not whether the maximum flow fits.
The more important question is:
Where does the process spend most of its operating time?
Confirm the pressure class for the actual configuration.
Do not assume the maximum pressure of the Prowirl family applies to every model.
The published current specifications show a substantial difference between F 200 and O 200 pressure capability.
Check the actual process temperature and the selected pressure class.
The current F 200 and O 200 information lists standard medium temperatures of approximately –40 to +260 °C, with extended high/low-temperature options depending on configuration.
The important phrase is:
depending on configuration.
Do not copy a headline temperature range into an RFQ without checking the selected ordering code.
Confirm:
A technically correct meter with the wrong mechanical interface is still the wrong purchase.
Check the process fluid against:
For chemical and hydrocarbon applications, this can be a procurement-critical issue.
Confirm whether the project needs:
Current O 200 documentation, for example, lists HART, PROFIBUS PA, FOUNDATION Fieldbus and PROFINET over Ethernet-APL / Modbus TCP over Ethernet-APL options depending on configuration.
This point deserves its own section because it can prevent an avoidable purchasing mistake.
If your specification says:
7F2B
do not automatically quote it as though it were the latest configuration.
Endress+Hauser currently identifies the 7F2B as no longer available and points to 7F2C as its successor.
The same situation exists for the D configuration: the official 7D2B page identifies it as no longer available and provides the newer Prowirl D 200 configuration.
For R 200, current documentation is available for 7R2C, while the older 7R2B documentation remains accessible as historical product information.
For O 200, both older 7O2B and current 7O2C documentation can be found, but the current O 200 product information is associated with 7O2C.
If an EPC specification contains an older ordering code:
Do not silently substitute.
Instead:
This is especially important for international projects where the purchase order, datasheet and vendor document may all need to match.
A good RFQ is not:
“Please quote Prowirl F 200 DN100.”
A better RFQ looks like this:
Fluid: Saturated steam
Min. flow: 1,200 kg/h
Normal flow: 3,500 kg/h
Max. flow: 5,000 kg/h
Operating pressure: 10 bar(g)
Operating temperature: 184 °C
Pipe size: DN100
Connection: EN 1092-1 PN16
Output: 4–20 mA + HART
Area classification: Zone 2
Quantity: 2 pcs
Required documentation: Datasheet + calibration/documentation + certificate package
This gives the supplier something that can actually be engineered.
It also gives the buyer a better basis for comparing quotations.
Do not compare quotations only by unit price.
A useful procurement comparison has at least five layers.
Does the selected configuration actually match the process?
Will it install correctly into the existing pipeline?
Does the operating flow range make sense?
Does the supplier provide the documents required by the project?
Does the quoted configuration, delivery and warranty meet the purchase requirement?
A lower quotation is not necessarily cheaper if it later creates:
For industrial instrumentation, the cheapest instrument and the lowest project cost are not always the same thing.
Before issuing the purchase order, confirm all of the following:
If several of these items are missing, the RFQ is not ready for a reliable model selection.
There is no universal winner in a Prowirl 200 F vs D vs R vs O comparison.
The better decision is to match the configuration to the dominant process constraint.
You need a versatile flanged configuration for conventional industrial flow measurement and the pressure, temperature and flow range fit the selected configuration.
The installation favors a wafer-style, compact configuration and mechanical integration is an important consideration.
The pipeline is relatively large but the actual process flow is low enough that reduced-line measurement deserves evaluation.
High process pressure is the main engineering constraint and the required pressure class exceeds what the other configurations can reasonably provide.
The most important principle is simple:
Do not select the Prowirl 200 from the pipe diameter or model name alone. Select it from the process conditions, measuring range, installation arrangement and pressure requirement.
That is the difference between selecting a flow meter by catalog and selecting one for an actual plant.
If you already have the process data, send:
fluid + minimum/normal/maximum flow + pressure + temperature + pipe size + connection + required output.
A technical supplier can then cross-check whether F 200, D 200, R 200 or O 200 is the appropriate configuration to investigate and whether the requested ordering code is current.
For projects specifying an older 7F2B, 7D2B, 7R2B or 7O2B code, include the exact code in the RFQ. This allows the supplier to check the predecessor/successor relationship rather than making an unapproved substitution.
Request a Prowirl 200 Technical Review and RFQ Cross-Check →
For the broader technology-selection question, start with the Industrial Flow Meter Hub. It covers the relationship between fluid properties, flow range, installation conditions and flow meter technology.
For technology-specific selection, continue to:
The purpose of this page is narrower: helping an engineer decide which Prowirl 200 configuration deserves technical evaluation.
