6/8 Measurement Flow Accuracy ±(1.5 % of reading + 0.3 % full scale) Selectable units m³/h, m³/min, l/min, l/s, cfm, kg/h, kg/min, kg/s Repeatability 0.25 % o.RDG Sensor Thermal mass flow sensor Sampling rate 3 samples / sec Turn-down ratio 200:1 Response time (t90) 0.5 sec Consumption Selectable units m³, ft³, t, lb, l, kg Pressure Accuracy 0.5 % FS Selectable units bar, psi, kPa, MPa Measuring range 0 ... 1.6 MPa (g) or 0 ... 5.0 MPa (g) Sensor Piezzo resistive sensor Temperature Accuracy 0.5 °C Selectable units °C, °F Measuring range -40 ... +120 °C Sensor Pt1000 Reference conditions Selectable conditions 20 °C 1000 mbar (ISO1217), 0 °C 1013 mbar (DIN1343) freely adjustable General data Configuration Wireless S4C-FS App for Android and iOS Others 3 touch button at display Display Integrated Color graphics display Material Process connection Stainless steel 1.4404 (SUS 316L) Housing Al alloy Sensor Stainless steel 1.4404 (SUS316L), 4J50 nickel plated, glass Metal parts Stainless steel 1.4404 (SUS 316L) Miscellaneous Electrical connection Screw terminals Protection class IP67, Ex option: IP65 Approvals CE, RoHS, FCC IECEx / GB : Ex db ib IIC T4 Gb Ex ib tb IIIC T135°C Db ATEX: II 2G Ex db ib IIC T4 Gb II 2D Ex ib tb IIIC T135°C Db Process connection S451: G3/4" (ISO 228/1) S453: Measuring section with R-thread or Flange Weight S451 300mm: S451 200mm: S453 without section: 2.15kg 2.08kg 1.86kg Operating conditions Medium Air, N₂, O₂, CO₂ and other non corrosive gases Medium temperature S451: -30 ... +140 °C (applicable for Non-Ex-Option) -30 ... +90 °C (applicable for Ex-Option) S453: -30 ... +90 °C Medium humidity < 90 %, no condensation Operating pressure S451: 0 ... 5.0 MPa for Non-Ex-and Ex Option* S453: 0 ... 4.0 MPa for Non-Ex-and Ex Option *For pressure above 1.5 MPa use the installation device A530 1119 or A530 1120 to install S451. Ambient temperature -40 ... +65 °C Storage temperature -40 ... +70 °C Transport temperature -40 ... +70 °C Pipe sizes S451: >= DN25 S453: DN25 ... DN80 Signal / Interface & Supply Analog output Signal 2 x 4 ... 20 mA (4-wire), isolated Scaling 0 ... max flow, freely adjustable Load Max. 400 Ohm Update rate Value updated ever 1 sec Pulse/Alarm output Signal Switch output, normally open, max. 30 VDC, 200 mA Scaling 1 pulse per consumption unit (selectable) Alarm Channel and threshold freely setable Fieldbus Protocol Modbus/RTU, Modbus/TCP Supply Voltage supply 16 ... 30 VDC Current consumption 200 mA Technical Data S451 / S453 Flow and Consumption Meter
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