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ELB浮子开关QFS-3系列技术参数
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System of protection EN 60529
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IP 68
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Cable inlet
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PVC, PTFE or PVDF
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Material float
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QFS-30, QFS-31：PPH (Polypropylen)
QFS-34：PE (Polyethylen)
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Cable
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TPK (PVC Basis) Ø 5,9 mm
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On request
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TPKV(verstärkt) Ø 7,3 mm
PUR (Polyurethan)Ø 5,4 mm
SIL (Silikon) Ø 6,4 mm
FEP (Teflon) Ø 4,0 mm
AEM (Ethylene-Acrylat-Rubber)
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Conductor cross section
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3x0,75mm²,PUR:3x0,5mm²
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Cable length X
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between float body and fixture
TPK -cable 70 mm
TPKV -cable 90mm
PUR -cable 100mm
SIL -cable 80 mm
FEP -cable 110 mm
AEM -cable dependent on the inner cable
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Operating temperature
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TPK(V), AEM max. + 60 °C
PUR:max. + 70 °C
Silicone,Tefloncablewith PEfloat:max. + 80 °C
Silicone,Tefloncablewith PPfloat:max. + 85 °C
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Operating pressure
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1 bar (cylinder)
2 bar (ball)
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Media density
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QFS-30 TPK(V)-cable 0,85 g/cm³
PUR -cable 0,95 g/cm³
SIL -cable 0,90 g/cm³
FEP -cable 0,95 g/cm³
AEM -cable 0,90 g/cm³
QFS-31 0,60 g/cm³
QFS-34 0,75 g/cm³
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Switching system
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µ-switch
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Contact
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change-over contact, NO, NC
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Inductive/capacitive load
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Contact protection must be provided
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ELB浮子开关QFS-3系列介绍
这些浮子开关的特点是其开关系统无需水银即可工作。开关系统由一个由球操作的µ开关组成，开关的角度约为 +3°/+12°（无滞后）和约（–26°/+28°的角度滞后）。
These float switches are characterised by their switching system which works without mercury. The switching system consists of a µ-switch which is operated by a ball and which switches with an angle of approx. +3° / +12° ( without hysteresis) and with an angle of approx.(with –26° / +28° additional hysteresis).
ELB浮子开关QFS-3系列其他常用型号：
ELB QFS-30
ELB QFS-31
ELB QFS-34