Elektromagnetic flow meters

Electromagnetic flow meters with „W-ss“ flow tube – wafer design



Electromagnetic flow meters with „W-ss“ flow tube – wafer design

The Wss (wafer, stainless steel) flow meters are only made with flowtubes in stainless steel housing and with stainless steel contact surfaces. They are thus suitable to measure flow in chemically aggressive liquids or for installation in corrosive environments or otherwise difficult conditions. The other parameters are identical with those of the W flowtube meters.

They too are designed to be installed between flanges. They are installed between two connecting flanges and tightened with bolts.

They are made with inner diameters from DN10 to DN80 are are primarily designed for chemical and food processing applications.

Their flowtubes are only made with Teflon liner and with a choice from several sensing electrode materials (316L stainless steel, Hastalloy C, titanium, ...).

The components in installation sets are all made of stainless steel. Installation sets may equally be custom specified with respect to installation length and type of connection (DIN 11851 threading for food industry, DIN 32676 clamp, etc.)

Earthing rings are also available if required.

All materials to be in contact with the medium under measurement are certified for permanent contact with drinking water (edibles) and hot utility water.

These flow meters are convenient to measure acid or alkaline solutions as well as various kinds of chemicals (lyes, acids, ammonia, hydrogen chloride, cleaning agents, ...).


FG4000 flow meter specifications:

  • Measuring range:
  • 1 :40 ( ±0,5% for MPE standard); 1:500 (Q0=0,2% Qmax)
  • Accuracy:
  • ± 0.5 % (± 0.003 m/s) in range from Qmin do Qmax
  • Minimum liquid conductivity:
  • >5ųS/cm – common liquids; ≥20ųS/cm – demineralized water
  • Power supplý:
  • 230 VAC (+10;−15%) 50–60Hz; optionally 120VAC, 24VAC, 24VDC
  • Power demand:
  • 10 VA
  • IEC 536 protection class:
  • I
  • Ingress protection rating:
  • IP67
  • Meter finish:
  • powder paint (RAL 8023)
  • Ambient temperature rangé:
  • 0–70°C; recommended 15–55°C
  • Pulse output 1:
  • in range 0.0001–1600 p/dm3 (maximum value depends on flowtube inner diameter)
  • Pulse output 2:
  • preferred for negative volume and flow values (bidirectional flow mode)
  • Pulse inputs:
  • 2× range (0.0001–1000 p/dm3) to display flow and/or volume measured by external
  • Empty pipeline indication:
  • yes (optional)
  • Communication modules:
  • RS485, RS422, RS232, M-Bus, ... (optional)
  • Analogue outputs:
  • 4-20 mA, 0-10 V (optional)

    Wafer flowtube specification:

  • Flowtube nominal inner diameter:
  • DN10 – DN100
  • Flowtube liner:
  • PTFE – teflon
  • Electrodes:
  • 316L grade (1.4571) stainless steel; Hastelloy C; platinum; tantalum; titanium
  • Nominal pressure:
  • PN25
  • Flowtube design:
  • compact; split – 4m cabling (optionally up to 40m)
  • Flowtube finish:
  • brushed stainless steel
  • Minimum liquid conductivity:
  • >5ųS/cm – common liquids; ≥20ųS/cm – demineralized water
  • Ingress protection rating:
  • IP67

    Table of included inner diameters̊:

    FG 4000 Wafer flowtubes „W-ss“
    DN 10 15 20 25 32 40 50 65 80 100
    Q0 (m3/h) 0,01 0,02 0,03 0,04 0,07 0,11 0,17 0,29 0,43 0,68
    Q1 (m3/h) 0,08 0,19 0,34 0,53 0,87 1,36 2,12 3,58 5,43 8,48
    Q3 (m3/h) 3,39 7,63 13,6 21,2 34,7 54,3 84,8 143 217 339
    k(Imp/dm3) 1600 700 400 200 150 100 60 35 25 15

    Legenda:

    DN - Flowtube nominal inner diameter
    Q0 - Starting flow
    Q1 - Minimal flow
    Q3 - Maximal flow
    k - Maximal constant of flow conversion

    Diameters and mass of wafer sensors:

    Electromagnetic flow meters with „W-ss“ flow tube – wafer design
    DN PN A ∅B ∅C D E F Svorníky m [kg]
    10 25 100 (66) 75 105 250 75 75 M12x170 4x 4,5
    15 25 100 (66) 75 105 250 75 75 M12x170 4x 5
    20 25 100 (66) 75 105 300 100 100 M12x170 4x 5
    25 25 100 85 115 350 125 125 M12x170 4x 5,7
    32 25 100 100 135 360 160 100 M16x175 4x 6,5
    40 25 100 110 145 420 200 120 M16x175 4x 6,7
    50 25 110 (108) 125 160 510 250 150 M16x175 4x 7,5
    65 25 110 145 180 630 325 195 M16x195 4x 8,5
    80 25 160 (163) 160 195 800 400 240 M16x195 8x 10,5
    100 25 160 (162) 190 230 960 500 300 M20x245 8x 12,5

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