Description
These float switches have a mercury-free switching system consisting of a microswitch and a ball which actuates this switch.
Technical Data
Technical Data
- Protection class EN60529
- IP 68
- Material Float
- PP
- Cable
- TPK (PVC Basis), PVC Basis verstärkt, Polyurethan, Silikon, Teflon, Ethylen-Acrylat-Kautschuk
- Conductor cross-section
- 3x 0,75 mm², Polyurethan 3x 0,5 mm²
- Operating temperature TPK(V)
- AEM Kabel max.+ 60 °C
- Operating temperature PUR cable
- max.+ 70 °C
- Operating temperature SIL, FEP cable
- max.+ 85 °C
- Operating pressure
- max. 1 bar Zylinder| max. 2 bar Kugel
- Switching system
- Mikroschalter
- Contact type
- Wechsler, NO, NC
- Electrical connection data, Ex-protection
- siehe EG-Prüfbescheinigung TüV 09 ATEX 555342
- Inductive/capacitive loads
- Unbedingt Kontaktschutz vorsehen
- CE marking
- siehe Konformitätserklärung
- Weight
- ca. 200 g
Media density Ex-QFS-30
- TPK(V) cable
- ρρ 0,85 g/cm³
- PUR cable
- ρρ 0,95 g/cm³
- SIL cable
- ρρ 0,90 g/cm³
- FEP cable
- ρρ 0,95 g/cm³
- AEM Cable
- ρρ 0,90 g/cm³
Media density Ex-QFS-31
- Sphere
- ρρ 0,60 g/cm
Mounting position
- Ex-QFS-30
- waagerecht mit G1” Verschraubung, senkrecht mit Beschwerungsgewicht (Ex)
- Ex-QFS-31
- waagerecht mit Flansch ab DN 100 (PP)
Ex-QFS-3x configuration
| Ex-QFS-3 | 1 | - | 2 | - | 3 | - | 4 | - | 5 | - | 6 |
Further product information
Float switches are used for simple limit value acquisition. The float floats on the liquid surface through the higher density of the liquid, and acutates a switching operation when the float deviates from the horizontal position.
In the mercury-free float switches of the QFS… series microswitches are used which are operated by a weight or with a ball, or reed contacts operated by a magnet. Mercury switches can be replaced by the appropriate Design problem-free. Also switching hysteresis are possible.
The main field of application is for the acquisition of limit levels (overflow and dry-running protection). For min-max control of pumps float switch combinations with several float switches are suitable.
The float switches are fixed on a tube or with loading weights.Our float switches can be used both in water and in aggressive media. For this a suitable cable material has to be selected:
- Thermoplastic rubber cable (TPK) is useable for water, waste water and oily liquids, as well as slightly aggressive liquids.
- For oil-containing media a PTFE nozzle should be provided.
- Silicone (SIL) for washing liquor at high temperatures
- Teflon (FEP) for aggressive liquids (acids/alkalies)
- TPK cable with an ethylene-copolymer coating (AEM) for dilute acids and alkalies.
