SlideControl

Flow Monitoring on Air Slides

Powdery products are transported in air slides in many industries. Until now it was not possible to continuously get information about the flow. With SlideControl there is now a sensor available, which monitors the material flow in the slide without any contact. 

By using microwaves, SlideControl measures the distance between the flowing material surface and the sensor and thus the filling height of the flowing material on the cloth. This filling height is provided as 4 … 20 mA signal.  SlideControl is characterized by the opportunity of an easy and retrofit installation on the air slide.

Features

  • Contact-free
  • Microwaves to measure the filling height in the top box
  • 4 . . . 20 mA-trendsignal for the flow rate
  • Fast recognition of Flow-/No Flow-conditions
  • Easy retrofitting
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Application Examples

  • Flow rate for bag filling machine after air slide

    Flow rate for bag filling machine after air slide

  • Flow rate monitoring of cement after cyclone separator

    Flow rate monitoring of cement after cyclone separator

  • Technical Specifications
  • Applications
  • Operating Principle
  • Literature

Sensor:

  • Process temperature : - 20 … + 80 °C / - 20 … + 220 °C
    (with process adapter)
  • Ambient temperature : - 20 … + 60 °C
  • Working Pressure : Max. 1 bar
  • Voltage supply : 18 ... 24 V DC / AC
  • Housing material : Stainless steel 1.457
  • Measuring frequency : 24.125 GHz; ± 100 MHz
  • Transmitting power : Max. 5 mW


Transmitter:

  • Supply voltage : 24 V DC ± 10 %
  • Power consumption : 20 W / 24 VA
  • Ambient operating temperature : - 10 … + 45 °C
  • Current output signals : 4…20 mA (0…20 mA), load < 500 O
  • On Air Slides

By using microwaves SlideControl measures the distance between the flowing material surface and the sensor and thus the filling height of the flowing material on the tissue.
This filling height is provided as 4 … 20 mA signal. 
If it comes to a standstill or demolition of the conveying, the output signal immediately drops to 4 mA, even if the material is still in the slide. 
It is possible to generate with the slide wide a trend signal for the flow rate, if the flowing density is known:

Q = H x B x ρ x v

In which
Q = Flow rate
H = Filling height
B = Slide wide
ρ = Fluidized density
v = Velocity 
The velocity of the material flow is assumed to be constant.
Parameters as the slide wide or the density of the material are typed into the transmitter by software.