- Reliable flow control of bulk solids in pipes with pneumatic conveying or a free-fall line
- Reliable calibration: Precise adjustment of the switching point based on measurement data without "guessing"
- High operational reliability
- Easy retrofitting without additional height or modifications
- Wear-free thanks to contactless, flush-mounted measurement
- Suitable for powders, dust, granules, pellets, and flakes
- Maintenance-free
- Independent of pressure and temperature
- Optional for Ex areas Zone 20, 21, and 22
- Optional higher operating temperature and pressure resistance (200 ºC / 15 bar)
The MIC Flow/NoFlow sensor is a compact system designed for monitoring bulk material flows. It works with a switching output that emits a signal when a defined throughput is reached or fallen below, or when a measuring range is left.
The system offers a cost-effective solution for numerous applications without compromising on precision.
Installation:
The sensor is used to control the mass flow of solid particles in metal pipes. To install it, first drill a hole in the pipe. Weld the supplied mounting sleeve onto the opening and screw in the sensor. The sensor is installed flush with the wall. This means that the measurement is wear- and maintenance-free.
The sensor emits microwaves with a measuring frequency of 24 GHz from its front side. The conveyed solid particles reflect a pulse spectrum from which the mass flow and velocity are determined using a patented algorithm.
The evaluation electronics integrated in the sensor head switch a digital output (0/1) and thus signal whether or not there is flow in the pipeline. The switching points are adjusted using the software included in the scope of delivery. The switching point can be precisely determined on the basis of the raw signal displayed, as the flow in the pipeline is visible during adjustment. This prevents the switching point from being set too close to the nominal flow or too close to the zero point.
The system is largely independent of pressure and temperature and thus provides a reliable basis for monitoring bulk solids in pneumatic conveying, free-fall pipes, and transfer chutes.
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| Sensor head: | V4A stainless steel with ceramic protection |
| Housing: | Aluminum |
| Protection class: | IP 66 |
| Installation socket: | 1" NPT |
| Optional | Explosion protection for Zone 20 inside the pipeline, Zone 21/22 outside the pipeline |
| Power supply: | 24 VDC |
| Current consumption: | 400 mA |
| Measurement frequency: | K band (24, 125 GHz) |
| Output: | Relay output (max. 30 VAC or VDC, 80 mA) |
Typical measurement accuracy:
| +/- 2–5% for pneumatic conveying systems +/- 5 - 10% in free-fall applications |
| Operating temperature range: | -10°C to 70°C and up to 120°C inside the pipeline / optionally up to 200°C |
| Pipeline: | DN50 to DN300, as well as rectangular ducts; larger diameters with multiple sensors |
| Dimensions: | Sensor housing 115x90x82 mm, waveguide 150×19 mm or 250×19 mm |
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The key difference between the two MIC systems lies in the type of measurement output and the range of functions. The system with switching output (MIC Flow/NoFlow) focuses on cost efficiency and precise monitoring, while the Mic Flowmeter continuous flow meter was developed for continuous measurements and detailed process control. Which system is more suitable depends on the individual requirements of the application.
The MIC microwave system was specially developed for continuous quantity measurement of pneumatically conveyed (pneumatic conveying) and free-falling bulk solids. This allows a wide range of products to be measured reliably.
The MIC sensor is suitable for mass flows ranging from a few kg/h to several hundred t/h. The possible throughput depends on the diameter and cross-sectional area of the pipeline.
The measuring system is largely independent of pressure and temperature. It is suitable for particulate products in pneumatic conveying or free fall.
- Important: Uniform distribution of the particles in the pipeline is crucial for precise measurement results.
- Measurement accuracy is reduced in the case of thick-flow conveying or lump formation.
- The recommended inlet and outlet distance is a multiple of the pipe diameter.
Our tip: We can help you select the ideal position for the MIC sensor.
- Pneumatic conveying: typical measurement accuracy of +/- 2–5%
- Downpipes: typical measurement accuracy of +/- 5–10%
Even distribution of the particles and the installation position are crucial for high measurement accuracy.
For flow monitoring: The MIC Smart Flow/NoFlow measuring system reliably detects flow through a pipe and is suitable for almost all types of bulk materials.
The microwave sensor measures particle size and quantity, but not density. Therefore, recalibration is necessary in the event of fundamental product changes or significant changes in bulk material properties (e.g., moisture).
Pneumatic conveying systems must be pneumatic conveying systems. Dense phase conveying or plug conveying are not suitable for measurement. Please contact us if you have any questions.
The maximum temperature in the pipeline for the standard sensor is 120 °C. Variants for product temperatures up to 200 °C are available. The maximum pressure in the pipeline is 15 bar.
The system is virtually maintenance-free when installed correctly. The sensor operates without contact, which prevents wear. The stainless steel detector tip (V4A) is equipped with high-strength ceramic wear protection.
Thanks to its flexible measuring principle, the MIC system is suitable for a wide range of products and is used in almost all industries.
In the case of the flow/no-flow sensor, the system provides a digital signal (0/1) as a relay output.