MaxxFlow HTC - Massaflowmeting voor vaste stoffen

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MaxxFlow HTC -
Massaflowmeting voor grote hoeveelheden

Voor de flowmeting van grote hoeveelheden stortgoed na mechanische transportsystemen zoals transportschroeven, air slides, elevatoren, etc.

  • Vrijwel alle (niet metallische) vaste stoffen zijn meetbaar
  • Voor ronde leidingen of kanalen
  • Geen maximaal meetbereik
  • drukbestendig tot 10 bar
  • 100 % stofbestendig
  • Geen obstakels in de transportstroom
  • Temperatuurbestendig tot 12O °C
  • Slijtvaste keramische binnenwand
  • Geringe inbouwhoogte van slechts 300 mm
  • Contactloze meetmethode (geen bewegende delen)

Use

The MaxxFlow HTC is specially developed for the flow measurement of dry bulk solids during high-volume throughput. Due to its completely open profile and its low installation height, the MaxxFlow HTC is especially suitable in situation in which it was previously only possible to use complicated or expensive mechanical solutions, e. g. impact plates or measuring chutes.

The installation of the MaxxFlow HTC takes place independently of the direction of the line (vertical/inclined), but always after mechanical conveyor elements, 
e. g. rotary feeder, screw conveyors, air slides or chain conveyors.

Function

After the conveyor, the material to be measured falls or slides through an inlet path and runs through the sensor. During the throughput, the MaxxFlow HTC records the material type and speed. Since the material falls from a constant height after emerging from the conveyor element, the speed of the product stream is accelerated, but is constant at the installation position of the sensor.
Due to this constant speed, the speed measurement does not need to be activated in every case, but can be calculated as a constant depending on the height of the fall. The mass flow is determined as follows:

Q (kg/s)   =   K (kg/m3)   x   v (m/s)   x   A (m2)

Through the input coupling of a high-frequency, electro-magnetic alternating field, a homogenous measuring field is generated in the measuring tube. 
The measuring tube (interior tube of the sensor) consists of wear-resistant Al2O3 ceramics. Dry bulk solids inside the measuring field reduce the amplitude of the alternating field.
This leads to a measuring signal that is in proportion to the concentration of the dry bulk solids in the sensor (kg/m3).

If the material speed varies, for example due to a change in initial speed, then this can also be measured.  
This takes place through a runtime measurement with the help of two additional electrodes behind the interior ceramics tube.

Mounting and Installation

A complete measuring station consists of these components:

•    Measuring feeder for installation in the conveyor line
•    Transmitter MFE 100

The measuring feeder is available in sizes DN 100, DN 150 mm and DN 200 mm. 
On request the components inlet path (between conveyor element and sensor) and gate valve (for calibration) can also be configured and supplied. 

The transmitter is connected to the sensor using 4-wired, shielded cable. 
The maximum distance between measuring feeder and transmitter is 300 m.

Technical Data

Sensor Housing Steel St 52, powder-coated (optional stainless steel 1.4571 NW 100/150/200 mm, flange according EN 1092-1  
  Inner pipe Ceramic AL2O3  
  Protection category IP 65  
  Operating temperature Sensor electronic:
0 ... + 60 °C
Sensor pipe:
- 20 ... + 120 °C
 
  Max. working pressure 1 bar, optional 10 bar  
  Working frequency 88 kHz  
  Transmitting power Max. 2 mW  
  Weight Depending on model  
  Accuracy ± 3 % (based on end of measuring range and calibrated material)  
       
Transmitter Power supply 110/240 V AC, 50 Hz, optional 24 V DC  
  Power comsumption 20 W / 24 VA  
  Operating temperature - 10... + 45 °C  
  Dimensions 258 x 237 x 174 mm (W x H x D)  
  Weight Approx. 2.5 kg  
       
Additional data RS 485 interface ModBus  
  Terminal clamp wire size 0.2 - 2.5 mm_ [AWG 24-14]  
  Current output signal 2 x 4 ... 20 mA (0 ... 20 mA), load < 500 Ohm  
  Serial output RS 485, ModBus protocol  
  Data backup Flash memory  
  Cable glands 3 x M 16 (4.5 - 10 mm Ø)  
       

Application Form

Application examples

Click on a desired application example to navigate to a detailed description.

Throughput measuring

Mass flow measurement 
of raw meal

Mass flow measurement of potato starch
in free fall prefeeding chain conveyors

Mass flow measurement of raw meal
in free fall after air slide

Mass flow measurement of salt 
in free fall pre feeding chain conveyor

Mass flow measurement  of
raw meal after dosing roller

Mass flow measurement for
truck loading

 
 

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