Volumetric Flow Ranges  

Pipe Specifications 

S401  

S421 

Inch

DN 

DI (mm) 

S401-S (m3/h) 

S401-M (m3/h) 

S401-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 

 Measurement

 Flow

 Accuracy

 1.5 % of reading ± 0.3 % FS (optional 1 % of reading)

 Selectable units

 m3/h, m3/min, l/min, l/s, cfm, kg/h, kg/min, kg/s

 Repeatability

 0.25 % of reading

 Sensor

 Thermal mass flow sensor

 Sampling rate

 10 samples / sec

 Turndown ratio

 200:1

 Response time (t90)

 0.1 sec

 Consumption

 Selectable units

 m3, ft3, l

 Reference conditions

 Selectable conditions

 20 °C 1000 mbar (ISO1217), 

 0 °C 1013 mbar (DIN1343) freely adjustable

 Signal / Interface & Supply

 Analog output

 Signal

 4 ... 20 mA (4-wire), isolated

 Scaling

 0 ... max flow, freely adjustable

 Load

 max. 250 Ohm

 Update rate

 Value updated ever 1 sec

 Pulse output

 Signal

 Switch output, normally open, max. 30 VDC, 20 mA

 Scaling

 1 pulse per consumption unit (selectable)

 Fieldbus

 Protocol

 Modbus/RTU, Modbus/TCP

 Update rate

 Value updated ever 1 sec

 Supply

 Voltage supply

 15 ... 30 VDC

 Current consumption

 max. 200 mA

 General data

 Configuration

 Wireless

 S4C-FS App for mobile phones

 PC Software

 USB Service Kit + Software

 Others

 Display with 2 touch buttons

 Display

 Integrated

 2.4” color graphic display with 2 touch buttons

 Material

 Process connection

 Stainless steel 1.4404 (SUS 316L)

 Housing

 PC + ABS

 Sensor

 Ceramic, glass coated

 Metal parts

 Stainless steel 1.4404 (SUS 316L)

 Miscellaneous

 Electrical connection

 2 x M12 (5 pole); 1 x M12 (8-pole x-coded) for TCP

 Protection class

 IP67

 Approvals

 CE, RoHS, FCC

 Process connection

 S401: G1/2” (ISO 228/1) 

 S421: Measuring section with R-thread or Flange

 Weight

 S401: 0.9 kg 

 S421: 0.4 kg (without measuring section)

 Operating conditions

 Medium

 Air, N₂, O₂, CO₂ and other gases

 Medium quality

 ISO 8573: 4.4.3 or better

 Medium temperature

 -30 ... +140 °C

 Medium humidity

 < 90 % rH, no condensation

 Operating pressure

 max. 5.0 MPa (> 1.6 MPa need installation device)

 Ambient temperature

 -30 ... +70 °C, -10 ... +50 °C (with display

 Ambient humidity

 < 99 % rH

 Storage temperature

 -30 ... +70 °C

 Transport temperature

 -30 ... +70 °C

 Pipe sizes

 S401: ½” ... 12” (bigger pipes on request) 

 S421: ½” ... 3”