5/6 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 Turndown ratio 200:1 Response time (t90) 0.5 sec Consumption Selectable units m³, ft³, l, kg Reference conditions Selectable conditions 20 °C 1000 mbar (ISO1217), 0 °C 1013 mbar (DIN1343) freely adjustable General data Configuration PC Software USB Service Kit + Software Display Integrated LCD Material Process connection Stainless steel 1.4404 (SUS 316L) Housing Al alloy Sensor Stainless steel 1.4404 (SUS 316L) Metal parts Stainless steel 1.4404 (SUS 316L) Miscellaneous Electrical connection Screw terminals Protection class IP67 Approvals CE, RoHS, FCC, Ex-Options Process connection S450: G1/2” (ISO 228/1) S452: Measuring section with R-thread or Flange Weight S450: 1.75 kg S452: 1.25 kg (without measuring section) Operating conditions Medium Air, N₂, O₂, CO₂ and other non corrosive gases Medium temperature S450: -40 ... +150 °C S452: -40 ... +100 °C Medium humidity < 90 %, no condensation Operating pressure S450: 0 ... 1.6 MPa (applicable for option A1280) 0 ... 5.0 MPa (applicable for option A1279)* S452: 0 ... 4.0 MPa *For pressure above 1.5 MPa use the installation device A530 1106 or A530 1113. Ambient temperature -40 ... +65 °C Storage temperature -30 ... +70 °C Transport temperature -30 ... 70 °C Pipe sizes S450: ½” ... 12” (bigger pipes on request) S452: ½” ... 3” Signal / Interface & Supply Analog output Signal 4 ... 20 mA (4-wire), isolated Scaling 0 ... max flow, freely adjustable Load Max. 400 Ohm Update rate Value updated ever 1 sec Pulse output Signal Switch output, normally open, max. 30 VDC, 200 mA Scaling 1 pulse per consumption unit (selectable) Fieldbus Protocol Modbus/RTU, HART, M-Bus Supply Voltage supply 16 ... 30 VDC Current consumption 200 mA Technical Data S450 / S452 Flow and Consumption Meter
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