S-421

Inline Type

  • Measures standard flow, mass flow and consumption
  • Thermal mass flow, independent of pressure and temperature changes
  • IP65 casing provides robust protection in rough industrial environment
  • Very fast response time
  • High accuracy and wide measuring range
  • Isolated mA and pulse output signals or Modbus/RTU or
  • Modbus/TCP interface (with PoE option)
  • Selectable gas type (Some gases require real gas calibration!)
  • Sensor can be calibrated in 2 different gases

PRODUCT DESCRIPTION

BENEFITS
  • Pipes sizes available: DN15, DN20, DN32, DN40, DN50, DN65, DN80
  • Fits your needs: various process connections available (R-thread, EN 1092-1 flange or ANSI flange)
  • Exchangeable sensor unit (easy sensor swap)
  • Optional flow conditioner, no need for a straight inlet anymore
INSTALLATION AND SENSOR REMOVAL

TECHNICAL DATA
General Specifications
Accuracy 1.5 % of reading + 0.3 % full scale (Optional high accuracy: 1% of reading + 0.3% FS)
Repeatability 0.25 % of reading
Sampling rate > 10 samples / sec
Reference conditions Can be set by user. Standard conditions are Ps = 0.1 MPa and Ts = 20 °C
Medium conditions: -30 ... +140 °C / relative humidity < 90 % no condensation
Transport Temperature: -30 ... +70 °C
 

Material:

Metal parts 1.4404 (SUS 316L) Casing PC + ABS

Sensor: Ceramic with glass coating

Classification: IP65
Electrical connection: 2 x M12, 5 poles (2 x M12 plug with screw terminals included)
Approvals: CE, RoHS, FCC
 

Operating temperature

-30 ... +140 °C fluid temperature

-30 ... +70 °C casing

-10 ... +50 °C casing with display

Operating pressure S401: 0 ... 5.0 MPa (>1.6 MPa need installation device) S421: 0.... 1.6 MPa (Optional: 4.0 MPa)
 

Analogue output

Signal: Scaling: Max load: 4 ... 20 mA, isolated 0 ... max flow

250R

 
Pulse output Signal: Scaling: Isolated switch output, normally open, Max 30 VDC, 20 mA 1 pulse per consumption unit  
Modbus output Isolated RS-485 with Modbus/RTU protocol or Modbus/TCP output (with PoE option)
Power supply 15 ... 30 VDC / 200 mA
Volumetric flow ranges S401 S421
Inch DN Di (mm) S 401-S

(m3/h)

S 401-M

(m3/h)

S 401-H

(m3/h)

Measuring range from to
½” DN15   - - - 0.5 ... 90 m³/h
¾” DN20   - - - 0.9 ... 170 m³/h
1” DN25 27.3 0.5 ... 147.7 0.6 ... 294.7 0.6 ... 356.9 1.5 ... 290 m³/h
1¼” DN32 36.0 0.9 ... 266.3 1.2 ... 531.5 1.2 ... 643.5 2 ... 500 m³/h
1½” DN40 41.9 1.2 ... 366.7 1.5 ... 731.9 1.5 ... 886.2 3 ... 700 m³/h
2” DN50 53.1 2.0 ... 600.1 2.5 ... 1197.6 3.0 ... 1450.0 4 ... 1000 m³/h
2½” DN65 68.9 3.5 ... 1026.5 5.0 ... 2048.6 5.0 ... 2480.4 6 ... 1500 m³/h
3” DN80 80.9 5.0 ... 1424.4 7.0 ... 2842.7 7.0 ... 3441.9 8 ... 2500 m³/h
4” DN100 100.0 10 ... 2183.3 12 ... 4357.2 12.0 ... 5275.7  
5” DN125 125.0 13 ... 3419.6 18 ... 6824.4 18.0 ... 8263.1
6” DN150 150.0 18 ... 4930.1 25 ... 9838.9 25.0 ... 11913.1
8” DN200 200.0 26 ... 8785.6 33 ... 17533.3 42.0 ... 21229.5
10” DN250 250.0 40 ... 13743.9 52 ... 27428.5 60.0 ... 33210.7
12” DN300 300.0 60 ... 19814.8 80 ... 39544.1 100.0 ... 47880.4

Stated measuring ranges under following conditions:

Standard flow in air Reference pressure: 1000 hPa

Reference Temperature: +20 °C

The table above shows the air flow ranges for pipe sizes up to DN300 at standard conditions. At other reference conditions and gas types the flow range may vary, please contact your local sales support.

Furthermore it is possible to measure the air flow in bigger pipes (> DN300), for this please contact your local sales support.

DIMENSIONS

ORDERING
S421 Thermal Mass Flow Meter (Inline type)
Order No. Code Description
S695 4120 S4210 S421 Thermal Mass Flow Meter, in-line type, 1.6 MPa version
S695 4121 S4211 S421 Thermal Mass Flow Meter, in-line type, 4.0 MPa version
Measuring section connection *
A130X A R-thread (ISO 7-1)
A132X B Flange, EN 1092-1, PN40
A134X C Flange ANSI 16.5
Measuring section size *
1 A DN15 (1/2”)
2 B DN20 (3/4”)
3 C DN25 (1”)
4 D DN32 (1.25”)
5 E DN40 (1.5”)
6 F DN50 (2”)
7 G DN65 (2.5”)
8 H DN80 (3”)
Gas type 1
A1007 A Air
A1008 B CO2
A1009 C O2 (Oil- & grease-free cleaned)
A1010 D N2
A1011 E N2O
A1012 F Argon
A1013 G Natural Gas
A1014 H H2 (real gas calibration)
A1015 I Other gas (Please specify)
A1016 J He (real gas calibration)
A1017 K C3H8
  Z No Second Gas
Gas type 2 (same selections as above)
Range
  A Standard range version
A1403 D Low range version (1/3 of standard range)
A1407 F Vacuum / Atmospheric range (1/3 of standard range)
Calibration
  A Standard calibration
A1404 E High accuracy calibration (1 % ± 0.3 %F.S.)
Output
A1410 A Analog 4 ... 20 mA, Pulse output
A1411 B Modbus/RTU output
A1413 C Analog 4 ... 20 mA, Pulse output compatible to S400
A1424 D Modbus/TCP output (including 5 m M12-cable with RJ45 Plug) (with PoE option)
Display
  A Without display                                               Standard
A1420 B With display
Flow conditioner (optional)
A107X A R-thread flow conditioner
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