Bulk Solids Flow Meter – DYNAchute MF 7000 Chute Weigher

MUTEC DYNAchute MF 7000 – In many bulk material handling processes, accurately measuring the mass flow rate of powders, granules, and pellets is essential for maintaining production efficiency, product quality, and inventory accuracy. However, conventional flow measurement technologies often require frequent recalibration because changes in moisture, density, particle size, or conveying conditions can significantly affect measurement accuracy.

The DYNAchute MF 7000 Bulk Solids Flow Meter from DYNA Instruments addresses these challenges with a different measuring principle. By combining a chute weigher with non-contact velocity measurement, the system continuously determines the actual mass flow rate of free-flowing bulk solids without relying on material-specific calibration. The result is a highly reliable continuous mass flow measurement solution that minimizes maintenance while delivering excellent repeatability in demanding industrial environments.

What Is DYNAchute Bulk Solids Flow Meter?

A bulk solids flow meter is an instrument designed to continuously measure the mass flow rate of dry bulk materials as they move through a production process. Unlike volumetric measurement, which estimates flow based on volume, a bulk solids mass flow meter calculates the actual mass being transported, providing more reliable process control regardless of changes in material characteristics.

The DYNAchute is a patented chute weigher specifically developed for inline solids flow measurement in vertical free-fall applications. It combines proven gravimetric weighing technology with non-contact velocity measurement to determine the real-time mass flow of powders, granules, pellets, and other free-flowing bulk materials. This measuring principle enables accurate continuous mass flow measurement without requiring product-specific calibration under normal operating conditions.

Unlike impact-based flow meters or systems that infer mass flow from a single parameter, DYNAchute independently measures:

• Product weight on the measuring chute
• Material velocity
• Continuous mass flow rate

Because these two physical values are measured separately and then combined mathematically, measurement accuracy remains stable even when operating conditions vary. According to the manufacturer, changes in moisture content, bulk density, particle size, friction characteristics, or product velocity do not significantly influence the measurement principle, eliminating the need for regular recalibration for different products.

Another important advantage is its passive mechanical design. Since the product flows naturally over the weighing chute without moving mechanical components, the instrument experiences minimal wear and requires very little maintenance throughout its service life. Even if the instrument is switched off, the material continues flowing freely through the chute without obstructing production.

Typical applications include

• Powder processing
• Plastic granule production
• Pellet manufacturing
• Chemical processing
• Mineral handling
• Food ingredient production
• Continuous production monitoring
• Batch weighing and dosing

Besides continuous measurement in kg/h, the integrated controller also supports totalizing and batch dosing functions, allowing the system to be used in both continuous and batch production processes.

Learn More: MUTEC products distributed by Ecozen

How Does DYNAchute Measure Bulk Solids Mass Flow?

The DYNAchute MF 7000 gravimetric flow meter uses a measuring concept similar to a belt weigher but is optimized for free fall flow meter applications where bulk solids move vertically through a chute. Instead of estimating flow from only one process variable, the system simultaneously measures material weight and conveying velocity before calculating the actual mass flow rate.

The measurement process follows several sequential steps.

1. Material enters the calming section

Bulk solids first enter a calming section that stabilizes the material stream before it reaches the measuring zone. This helps create a consistent flow profile for accurate measurement.

2. Product passes over the weighing chute

The material then slides smoothly across a specially designed weighing chute connected to a precision load cell.

Unlike conventional impact systems, the load cell measures only the force acting perpendicular to the chute surface. Friction forces acting parallel to the chute do not influence the weight measurement, improving overall measurement stability.

3. Velocity is measured without contacting the material

Two sensors positioned along the measuring chute detect naturally occurring electrical charge signals generated by the moving product.

Using digital correlation analysis, the electronics calculate the time delay between the two signals.

From this known sensor spacing and measured time difference, the system determines the actual velocity measurement of the bulk material without mechanical contact.

4. Mass flow is calculated

Once both measurements are available, the controller calculates the mass flow rate using two independently measured absolute values:

Mass Flow = Product Mass × Material Velocity

The resulting mass flow calculation is then transmitted through analog or digital outputs for process monitoring, production control, inventory management, or automatic dosing applications.

Why doesn’t DYNAchute require product calibration?

Many conventional flow meters estimate flow using indirect measurement methods that depend heavily on the physical characteristics of the product. As moisture, density, particle size, or friction properties change, their measurement accuracy may drift, requiring repeated calibration.

The DYNAchute avoids this limitation because it measures the two physical quantities—weight and velocity—directly and independently. Since neither value depends on inferred material properties, the system maintains high reproducibility across different products without extensive calibration or routine recalibration in the process.

This measurement principle makes DYNAchute particularly suitable for production lines handling multiple bulk materials where consistent accuracy, minimal maintenance, and reliable long-term operation are critical.

Key Features and Benefits

Choosing the right bulk solids flow meter is not only about achieving high measurement accuracy. Long-term reliability, maintenance requirements, adaptability to different materials, and total operating costs all play a significant role in determining the return on investment. The DYNAchute is designed to address these challenges through a patented gravimetric measuring principle that delivers stable performance across a wide range of industrial applications.

High Accuracy for Reliable Process Control

The DYNAchute MF 7000 provides highly accurate continuous mass flow measurement by independently determining product mass and conveying velocity before calculating the final mass flow rate. Since both values are measured directly rather than estimated, the system delivers consistent and repeatable results throughout the production process.

Compared with conventional flow measurement technologies, this approach minimizes measurement uncertainty and supports better:

• Production control
• Process optimization
• Inventory management
• Quality assurance
• Material balance calculations

The manufacturer states that the system can achieve measurement accuracy of 1% or better, with certain configurations capable of even higher performance depending on application conditions.

No Product Calibration Required

One of the biggest advantages of the DYNAchute gravimetric flow meter is its ability to measure different bulk materials without requiring product-specific calibration.

Many conventional technologies depend on empirical calibration factors because their measurements are influenced by material characteristics such as:

• Moisture content
• Bulk density
• Particle size
• Friction properties
• Product velocity

Whenever these characteristics change, recalibration is often necessary to maintain acceptable accuracy.

The DYNAchute eliminates this limitation by separately measuring product weight and velocity. Because the measuring principle is based on absolute physical values rather than inferred correlations, changes in product properties have little influence on the measurement result under the intended operating conditions. As a result, extensive calibration during commissioning and routine recalibration for different products are generally unnecessary.

This is particularly beneficial for facilities that frequently switch between multiple grades or formulations of powders, pellets, or granules.

Maintenance-Free Design with No Moving Parts

Mechanical wear is one of the primary causes of downtime in many industrial flow measurement systems.

The DYNAchute minimizes this risk through a simple passive design that contains no moving components inside the measuring section. Bulk materials slide naturally over the weighing chute while the sensing elements remain protected from direct mechanical contact.

Key maintenance advantages include:

• No rotating mechanical assemblies
• Minimal wear during operation
• Reduced maintenance intervals
• Lower spare parts consumption
• Long-term measurement stability

Because there are no moving parts exposed to continuous abrasion, the system helps reduce lifecycle maintenance costs while improving equipment availability.

Low Operating Cost

Reducing operating expenses is a major objective for modern bulk material handling systems. Besides eliminating frequent calibration, the DYNAchute also lowers overall ownership costs through its maintenance-free design and passive measuring principle.

Additional operational benefits include:

• No routine recalibration
• Minimal maintenance requirements
• Low wear on mechanical components
• Simple integration into existing production lines
• Reliable long-term operation

The brochure also notes that the low installation height makes the system suitable for retrofit projects where available installation space is limited. Customized process connections are available to accommodate different plant layouts.

Free Product Flow Even When the Device Is Switched Off

Unlike some measuring technologies that can obstruct product movement during maintenance or power loss, the DYNAchute allows bulk materials to continue flowing through the measuring chute even when the instrument is switched off.

This passive operating principle helps prevent unnecessary production interruptions and supports higher plant availability during maintenance or unexpected shutdowns.

Continuous Measurement and Batch Control

Beyond functioning as a bulk solids mass flow meter, the DYNAchute can also support production automation through its dedicated DYNAcon system controller.

The controller provides two operating modes:

Flow Control

• Continuous mass flow measurement (e.g., kg/h)
• Real-time process monitoring
• Control of rotary feeders, slide gates, and screw conveyors according to a target flow rate

Batch Control

• Automatic batch dosing
• Totalized weighing
• Batch quantity control according to predefined setpoints

Measured values can be transmitted through analog or digital interfaces for seamless integration into plant automation systems. The DYNAcon controller also supports Ethernet, RS485, CAN bus, relay outputs, and analog I/O, providing flexibility for a wide range of industrial control architectures.

Applications and Technical Specifications

The DYNAchute MF 7000 is designed for free-fall bulk material flow measurement in industrial processes where accurate, continuous monitoring of mass flow is essential. Its gravimetric measuring principle makes it suitable for a wide variety of free-flowing bulk solids while maintaining stable measurement performance without frequent recalibration. Whether installed in new production lines or retrofitted into existing facilities, the system provides reliable data for production control, process monitoring, inventory management, and quality assurance.

Typical Applications

As a versatile bulk solids flow meter, the DYNAchute can measure numerous dry bulk materials flowing through vertical chutes or pipelines.

Typical materials include:

• Powders
• Plastic granules
• Plastic pellets
• Chemical raw materials
• Mineral products
• Food ingredients
• Fertilizers
• Free-flowing bulk solids

Because the measuring principle is largely independent of variations in moisture, density, particle size, and friction characteristics, the instrument is particularly suitable for plants handling multiple products on the same production line.

Common Industries

The DYNAchute supports a broad range of industrial sectors requiring precise bulk material flow measurement, including:

• Chemical manufacturing
• Plastics and polymer production
• Food and beverage processing
• Building materials
• Minerals and mining
• Recycling
• Agriculture
• Powder processing industries

Typical applications include:

• Production control
• Process monitoring
• Continuous dosing
• Batch weighing
• Inventory management
• Quality control
• Loading and unloading operations

The integrated DYNAcon controller further enables automatic flow control and batch dosing by communicating directly with rotary feeders, slide gates, screw conveyors, and other dosing equipment.

Technical Specifications

The following specifications are based on the DYNAchute configuration provided and the manufacturer’s documentation.

For applications involving extremely dusty materials, the manufacturer also specifies an optional purge air connection to help protect the measuring system under demanding operating conditions. Different measuring sizes and customized process connections are available depending on the required flow capacity and installation constraints.

Installation Requirements

To achieve optimum measurement performance, the DYNAchute should be installed in a vertical, vibration-free free-fall section where the product can move smoothly across the weighing chute.

A typical installation sequence is:

Material Inlet → Calming Section → Measuring Chute → Outlet Hopper or Receiving Vessel

The calming section helps stabilize the material stream before it reaches the measuring zone, while the weighing chute and velocity sensors perform simultaneous measurements of product mass and conveying speed. The manufacturer also highlights the system’s relatively low installation height, making it easier to integrate into both new process lines and retrofit projects with limited available space.

Why Choose DYNAchute from Ecozen?

Selecting the right bulk solids measurement solution involves more than choosing the correct instrument. Proper application analysis, installation guidance, and long-term technical support are equally important for achieving reliable measurement performance.

As an authorized supplier of DYNA Instruments solutions, Ecozen supports customers throughout the entire project lifecycle, including:

• Technical consultation for bulk solids flow measurement applications
• Assistance in selecting the appropriate DYNAchute model
• Application and installation review
• Commissioning support
• Integration with existing control systems
• Responsive after-sales technical support
• Genuine DYNA Instruments products and documentation

Whether your objective is improving production control, optimizing dosing accuracy, or implementing reliable inline bulk solids measurement, Ecozen can help you identify the most suitable DYNAchute configuration for your process.