S 401 Flow/Consumption sensor (Insertion Type)

Features S 401

  • Tube diameters of DN25 to DN500.
  • 2 installation types: center installation and 100 mm insertion depth installation for bigger pipes (> DN250)
  • Installation under pressure through 1/2” ball valve

Common Features S 401 & S 421

  • Measures standard flow, mass flow, consumption and temperature
  • 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 interface
  • Selectable gas type (some gases require real gas calibration!)
  • App for mobile phones and tablets for sensor settings via BlueTooth
  • Sensor can be calibrated in 2 different gases

Volumetric flow ranges S 401

Inch DN Di (mm) S 401-S(m3/h) S 401-M(m3/h) S 401-H(m3/h)
1” DN25 27.3 0.5 … 147.7 0.6 … 294.7 0.6 … 356.9
1¼” DN32 36.0 0.9 … 266.3 1.2 … 531.5 1.2 … 643.5
1½” DN40 41.9 1.2 … 366.7 1.5 … 731.9 1.5 … 886.2
2” DN50 53.1 2.0 … 600.1 2.5 … 1197.6 3.0 … 1450.0
2½” DN65 68.9 3.5 … 1026.5 5.0 … 2048.6 5.0 … 2480.4
3” DN80 80.9 5.0 … 1424.4 7.0 … 2842.7 7.0 … 3441.9
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

The table shows flow ranges up to 300 mm pipe diameter at standard conditions in air. At other standard conditions and in other gases flow ranges are different and data are available on request.In larger pipe diameters flow can also be measured.

Technical data S 401/421
Accuracy 1.5% of reading + 0.3% full scale
Optional 1% of reading
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
Operating
temperature
-30 °C … +140 °C fluid temperature
-30 °C … +70 °C casing
-10 °C … +50 °C casing with display
Operating
pressure
S 401: 0 … 5.0 MPa (>1.6 MPa need installation
device)
S 421: 0 … 1.6 MPa
Analogue
output
Signal: 4 … 20 mA, isolated
Scaling: 0 … max flow
Max load: 250R
Pulse output Signal:Isolated switch output, normally
open, Max 30 VDC, 20 mA
Scaling:1 pulse per consumption unit
Modbus/RTU Isolated RS-485 with Modbus/RTU protocol
Power supply 12 … 30 VDC / 200 mA
Wetted material Stainless steel 1.4404 (SUS 316L)