Flow Indicators

Analogue STAUFF hydraulic testers with brass and aluminium housing for mechanical and therefore network-independent flow rate measuring of hydraulic media flow in mobile and industrial hydraulics. For load testing of the hydraulic system, the SDMKR is equipped with a load valve for targeted control of the working pressure. This product also accepts reverse flow (without flow metering). The SMD on the other hand can and must not be subjected to reverse flow. Designed for installation in straight tubes.

STAUFF Diagtronics

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Safety Burst Discs for Reversible Flow Meters to protect against Pressures > 420 bar

€38.00 / piece

Shipping from €7.99 / plus taxes

STAUFF Material Description

STAUFF Material Number

Disc-SDMKR-420bar/6000PSI-Burst

1910002069

STAUFF Material Description

STAUFF Material Number

Disc-SDMKR-420bar/6000PSI-Burst

1910002069

Flow Indicator Housing Material: Aluminium Flow Range: 10-200l/min max. Working Pressure 5075 PSI Connection Thread G1 1/2 BSP

€1,744.00 / piece

Shipping from €7.99 / plus taxes

STAUFF Material Description

STAUFF Material Number

SDM-1500-A-200-T

1910000614

STAUFF Material Description

STAUFF Material Number

SDM-1500-A-200-T

1910000614

Flow Indicator Housing Material: Aluminium Flow Range: 20>300l/min max. Working Pressure 5075 PSI Connection Thread G1 1/2 BSP

€1,744.00 / piece

Shipping from €7.99 / plus taxes

STAUFF Material Description

STAUFF Material Number

SDM-1500-A-300-T

1910000615

STAUFF Material Description

STAUFF Material Number

SDM-1500-A-300-T

1910000615

Flow Indicator Housing Material: Aluminium Flow Range: 20-400l/min max. Working Pressure 5075 PSI Connection Thread G1 1/2 BSP

Price only available on request

STAUFF Material Description

STAUFF Material Number

SDM-1500-A-400-T

1910000616

STAUFF Material Description

STAUFF Material Number

SDM-1500-A-400-T

1910000616

Flow Indicator Housing Material: Brass Flow Range: 10-200l/min max. Working Pressure 5075 PSI Connection Thread G1 1/2 BSP

€2,290.00 / piece

Shipping from €7.99 / plus taxes

STAUFF Material Description

STAUFF Material Number

SDM-1500-B-200-T

1910000620

STAUFF Material Description

STAUFF Material Number

SDM-1500-B-200-T

1910000620

Flow Indicator Housing Material: Brass Flow Range: 20-400l/min max. Working Pressure 5075 PSI Connection Thread G1 1/2 BSP

€2,325.00 / piece

Shipping from €7.99 / plus taxes

STAUFF Material Description

STAUFF Material Number

SDM-1500-B-400-T

1910000621

STAUFF Material Description

STAUFF Material Number

SDM-1500-B-400-T

1910000621

Flow Indicator Housing Material: Aluminium Flow Range: 2-16l/min max. Working Pressure 6091 PSI Connection Thread G3/4 BSP

€772.00 / piece

Shipping from €7.99 / plus taxes

STAUFF Material Description

STAUFF Material Number

SDM-750-A-016-T

1910000609

STAUFF Material Description

STAUFF Material Number

SDM-750-A-016-T

1910000609

Flow Indicator Housing Material: Aluminium Flow Range: 2-30l/min max. Working Pressure 6091 PSI Connection Thread G3/4 BSP

€772.00 / piece

Shipping from €7.99 / plus taxes

STAUFF Material Description

STAUFF Material Number

SDM-750-A-030-T

1910000610

STAUFF Material Description

STAUFF Material Number

SDM-750-A-030-T

1910000610

Flow Indicator Housing Material: Aluminium Flow Range: 3-60l/min max. Working Pressure 6091 PSI Connection Thread G3/4 BSP

€772.00 / piece

Shipping from €7.99 / plus taxes

STAUFF Material Description

STAUFF Material Number

SDM-750-A-060-T

1910000611

STAUFF Material Description

STAUFF Material Number

SDM-750-A-060-T

1910000611

Flow Indicator Housing Material: Aluminium Flow Range: 5-120l/min max. Working Pressure 6091 PSI Connection Thread G3/4 BSP

€772.00 / piece

Shipping from €7.99 / plus taxes

STAUFF Material Description

STAUFF Material Number

SDM-750-A-120-T

1910000612

STAUFF Material Description

STAUFF Material Number

SDM-750-A-120-T

1910000612

Flow Indicator Housing Material: Aluminium Flow Range: 10-180l/min max. Working Pressure 6091 PSI Connection Thread G3/4 BSP

€879.00 / piece

Shipping from €7.99 / plus taxes

STAUFF Material Description

STAUFF Material Number

SDM-750-A-180-T

1910000613

STAUFF Material Description

STAUFF Material Number

SDM-750-A-180-T

1910000613

Flow Indicator Housing Material: Brass Flow Range: 2-30l/min max. Working Pressure 6091 PSI Connection Thread G3/4 BSP

€1,156.00 / piece

Shipping from €7.99 / plus taxes

STAUFF Material Description

STAUFF Material Number

SDM-750-B-030-T

1910000617

STAUFF Material Description

STAUFF Material Number

SDM-750-B-030-T

1910000617

You have a regular demand for pipework equipment and hydraulic components and you are looking for individual pricing for our product range, please contact STAUFF.

Buy STAUFF flowmeters for hydraulic systems

The analogue flowmeters in the SDM and SDMKR series from STAUFF enable the mechanical and therefore mains-independent measurement of flow rates in hydraulic systems. They are ideal for mobile hydraulics and industrial hydraulics, e.g. for functional testing, commissioning or troubleshooting in the hydraulic circuit. The SDMKR also has an integrated load valve that enables targeted control of the working pressure - ideal for load tests and diagnostics under real operating conditions.

Product overview

The category includes the following versions:

SDM - Flowmeter for analogue measurement of hydraulic media flows

For oil (aluminium housing, double scale: l/min & GPM)

For oil and water (brass housing, simple l/min scale)

With pressure gauge connection

SDMKR - Flow meter with integrated load valve

For targeted pressure control in the work area

Reverse flow (without measuring function)

With bursting discs as overpressure protection

Common features of both series:

Mechanical measurement, mains-independent

Designed for straight pipework installation

Various flow ranges available up to 400 l/min (SDM) or 200 l/min (SDMKR)

Aluminium or brass housing

Type SDM for oil

Type SDM for oil and water

Type SDMKR

How the flowmeters work

STAUFF flowmeters work with a sharp-edged orifice and a conical measuring piston that moves in proportion to the flow rate. The resulting differential pressure presses the piston against a spring - this movement is transmitted to the scale via magnetic force.
This design minimises viscosity influences and enables precise, repeatable measurement.

The SDMKR also has an integrated load valve:

enables controlled pressure increase in the system

allows realistic load tests under different operating conditions

Protects the system with integrated bursting discs (release > 420 bar)

The SDM must not be flowed through backwards, while the SDMKR can be flowed through backwards (without measuring effect).

Technical features

The flowmeters of the SDM and SDMKR series offer:

Measuring ranges (depending on model):

2-400 l/min (SDM aluminium)

up to 200 l/min water/oil (SDM brass)

up to 200 l/min (SDMKR)

Media: Mineral oils, oil-water mixtures (brass), water

Temperature ranges:

Medium: +20 °C to +110 °C

Continuous operation: up to +80 °C

Accuracy:

Flow rate ±4 % FSD

Temperature ±2.5 °C

Pressure (SDMKR): ±1.6 % FS

Connection sizes:

SDM 750: G 3/4

SDM 1500: G 1½

Mechanical design:

Aluminium or brass housing

Analogue scale for l/min and GPM

Integrated pressure gauge connection (SDM)

Areas of application

The flowmeters are used in a wide range of hydraulic applications:

Mobile hydraulics (e.g. construction machinery, agricultural machinery, forestry machinery)

Industrial hydraulics and power unit construction

Test benches and machine commissioning

Preventive maintenance and troubleshooting

Load tests (with SDMKR)

The mechanical flow meters demonstrate their strengths in particular where no external power supply is available and the use of conventional measuring devices (e.g. from STAUFF's PPC programme) is limited in terms of time.

Advantages of STAUFF flowmeters

Precise mechanical flow measurement without power supply

Robust, proven measuring mechanism

Simple installation in straight pipework

SDMKR: Integrated load valve for load tests

Reverse / reversible flow (SDMKR)

Brass variants for water applications

Protection of hydraulic components through precise system diagnostics

Data sheet on flowmeters from STAUFF

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Catalogue STAUFF Diagtronics

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Catalogue STAUFF Diagtronics

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Frequently asked questions and answers about flowmeters from STAUFF

What is the difference between SDM and SDMKR flowmeters?

The SDM is an analogue flowmeter for the precise measurement of flow rates and temperatures in hydraulic systems.

The SDMKR also offers an integrated load valve with which the working pressure in the system can be specifically increased and controlled - ideal for load tests, function tests and troubleshooting under real operating conditions.
Further differences:

SDMKR can be flowed through backwards (without measuring function) - the SDM cannot.
SDMKR has integrated bursting discs as overpressure protection.

This makes the SDM the choice for standard measurements, while the SDMKR was developed for demanding diagnostics and service applications in mobile and industrial hydraulics.

Which media are STAUFF flowmeters suitable for?

The media compatibility depends on the housing material:

SDM (aluminium housing): Mineral oils
SDM (brass housing): Oil-water mixtures and water
SDMKR: Mineral oils

The brass versions are particularly suitable for environments in which water hydraulics or oil-water mixtures are also used - for example in industry, in test bench construction or in regions with special environmental regulations.

How is a STAUFF flowmeter installed correctly?

It is installed straight into the pipework, ideally at an easily accessible point for servicing and diagnostics.
Important:

SDM: Observe the installation direction as indicated by the arrow.
SDMKR: Flow can pass in both directions, but only in the main flow direction with measuring function.

This design makes the devices particularly suitable for mobile machines and industrial hydraulic systems where simple, fast diagnosis is required.

How accurately do SDM and SDMKR measure flow, temperature and pressure?

The mechanical flowmeters provide precise, reproducible values without an external power supply:

Flow accuracy: ±4 % FSD
Temperature measurement: ±2.5 °C
Pressure measurement (SDMKR only): ±1.6 % FS

The combination of sharp-edged orifice, spring mechanism and magnetic transmission makes them particularly reliable with changing viscosity - a major advantage over simple visual flow indicators.

What flow ranges do the devices cover?

The STAUFF series offers a wide range for a wide variety of machines and line designs:

SDM aluminium: 2-400 l/min
SDM brass: up to 200 l/min (oil + water)
SDMKR: up to 200 l/min

This makes them suitable for both small mobile hydraulic circuits and powerful industrial units.

What is the integrated loading valve in the SDMKR used for?

The load valve enables:

targeted pressure increase in the system
Functional tests under load
Realistic simulation of operating conditions
Diagnosis of power losses or pump problems
Safe load tests thanks to overpressure protection by bursting discs

The SDMKR therefore offers considerable advantages, particularly in service applications - e.g. in the field, in a workshop van or during commissioning.

In which environments are SDM and SDMKR used worldwide?

The devices can be used globally, including in

Construction machinery, forestry machinery, agricultural machinery (mobile hydraulics)
Industrial units, test benches, mechanical engineering
Regions without a reliable power supply - thanks to fully mechanical measurement
Workshops and service teams that require quick on-site diagnostics

Particularly in countries with demanding operating conditions (heat, heavy dust exposure, mobile service teams), the off-grid mechanics really come into their own.

What temperature ranges do the devices support?

The flowmeters can be operated safely in:

Medium: +20 °C to +110 °C
Continuous operation: up to +80 °C

They are therefore also suitable for warm industrial environments and hydraulic applications with permanently high loads.

What connection sizes are available?

Typical connection sizes are

SDM 750: G 3/4
SDM 1500: G 1½

The devices are designed for straight pipework installation, which facilitates installation in international hydraulic standards (e.g. EU, North America, Asia).

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Direct sourcing from the quality manufacturer

Development, manufacturing and logistics in Germany

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Get directly in touch with the STAUFF customer service and sales team

Purchase with a few clicks

Add items to the shopping cart, order, pay and you're done

Express delivery

Typically for orders placed until 14:00 o'clock CET (for defined destinations only)

Questions about flowmeters from STAUFF

Do you need more information about choosing the right product or do you have any questions about the online purchasing process? Then contact a real product specialist in STAUFF's sales department right now via live chat.

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Flow Indicators

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Flow

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Buy STAUFF flowmeters for hydraulic systems

Product overview

How the flowmeters work

Technical features

Areas of application

Advantages of STAUFF flowmeters

Data sheet on flowmeters from STAUFF

STAUFF Online Page-Flip Content

Frequently asked questions and answers about flowmeters from STAUFF

What is the difference between SDM and SDMKR flowmeters?

Which media are STAUFF flowmeters suitable for?

How is a STAUFF flowmeter installed correctly?

How accurately do SDM and SDMKR measure flow, temperature and pressure?

What flow ranges do the devices cover?

What is the integrated loading valve in the SDMKR used for?

In which environments are SDM and SDMKR used worldwide?

What temperature ranges do the devices support?

What connection sizes are available?

Your benefits in the STAUFF online shop

Direct sourcing from the quality manufacturer

Live chat

Purchase with a few clicks

Express delivery

Questions about flowmeters from STAUFF