IFM SI0558 Thermal Flow Monitor Overview
The IFM SI0558 is an advanced thermal flow switch engineered by IFM Electronic for reliable monitoring of liquids and gases in industrial piping systems. Built with a robust stainless steel housing, this unit incorporates a clear 3-color LED bar graph display to provide immediate visual indication of flow status and switch points.
Technical Specifications & Electrical Data
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Manufacturer: IFM Electronic
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Part Number: SI0558
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Operating Voltage: < 24 AC / 18…36 V DC (to SELV/PELV)
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Current Consumption: < 80 mA
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Protection Class: III
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Power-on Delay Time: 10 s
Application & Measuring Range
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Media Compatibility: Liquids and gases
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Setting Range for Liquids: 3…300 cm/s
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Medium Temperature Range: -25 °C to 70 °C
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Pressure Rating: Up to 300 bar (30 MPa)
Outputs & Accuracy
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Output Signal: Switching signal (1 digital output, normally open)
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Contact Rating: 2 A, 24 V AC/DC
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Repeatability: 1…5 cm/s (for water 5…100 cm/s at 25 °C)
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Switch Point Accuracy: $\pm 2…\pm 10$ cm/s
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Hysteresis: 2…5 cm/s
Mechanical Design & Environmental Ratings
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Process Connection: M18 x 1.5 internal thread for flexible adapter usage
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Enclosure Protection: IP65 / IP67
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Housing Material: Stainless steel (316L / 1.4404); PBT-GF20; PC
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Wetted Parts Material: Stainless steel (316L / 1.4404); FKM O-ring
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Ambient Temperature Range: -25 °C to 60 °C (operation)
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Electrical Connection: M12 connector (A-coded, 5 contacts)
