6/8 S401 / S421 Flow and Consumption Meter Technical Data 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 Turn-down 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 3 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 IP65 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”
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