S 421 Flow/Consumption sensor (Inline-sensor)

Features S 421

  • Pipes sizes available: DN32, DN40, DN50, DN65, DN80
  • Process connections available: R thread, flange EN1092-1, ANSI/B16.5
  • Exchangeable sensor unit (easy sensor swap)
  • Integrated flow conditioner –> no straight inlet requirements

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 421

Connection thread DN Measuring range from to
* 1¼” DN32 2 … 500 m³/h
* 1½” DN40 3 … 700 m³/h
* 2” DN50 4 … 1000 m³/h
* 2½” DN65 6 … 1500 m³/h
* 3” DN80 8 … 2500 m³/h
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)