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Stainless Steel Float Switch

QFS-20 & QFS-21 float switches have stainless steel floats and one or two reed contacts.

Properties

• Protection class EN60529 : IP68
• Material Float : VA 1.4571
• Material hose : Edelstahlwellschlauch (1.4404) mit Edelstahldrahtumflechtung (1.4301)
• Operating temperature : max. + 150 °C
• media density : ρ ≥ 0,8g/cm³
• Switching system : Reed-Schalter
• Contact : Wechsler, NO, NC
• Switching voltage : 4...250 V AC/DC
• Switching current : 1 mA ...1 A
• Switching capacity : max. 1A, 60 VA/60 W
• Switching hysteresis : ca. 100 mm
• Switching angle : ca. + 20° / – 20°
• Operating pressure (QFS-20) : max. 15 bar
• Operating pressure (QFS-21) : max. 6 bar

Electrode relays and contact protection relays

The electrode relays are used for conductive level detection. levels. The possible applications extend areas where conductive, liquid media are to be detected, controlled to be detected, controlled or regulated. Hereby level detection (overflow / dry run) as well as minimum / maximum as well as minimum / maximum controls can be realised. The contact protection relays are universal measuring transducers, which input signals (resistance values) with "Namur" specification (DIN EN 60947). Namur" specification (DIN EN 60947) into switching signals of floating output contacts.

Protection class EN60529

• clamp : IP20
• Housing : IP40

Technical Data

• Operating temperature : -20...+60 °C
• Storage temperature : -30...+80 °C
• Output contacts : potentialfrei
• Switching voltage : min. 5 V | max. 250 V AC / 150 V DC
• Switching current : min. 5 mA | max. 5 A AC / 5 A DC
• Switching capacity : min. 300 mW | max. 100 VA / 50 W
• Quiescent current : umschaltbar
• Weight : ca. 250 g
• CE marking : siehe Konformitätserklärung
• Ex-protection/IECEx : siehe Prüfbescheinigung