QFS-55

Teflon float switch in rod design

Features

EX

product family

level measurement

product class

Point Level Measurement

suitable for

fluids

measurement principle

Schwimmer


Special characteristics

  • For liquids of all kinds

  • Optional: Ex approval for Ex zone 1(Cat. 2) according to ATEX

  • Up to +150°C

Description

The float switch combination is built with float switches of the QFS-50 and QFS-60 series. This makes it possible to control a level in a simple way.

Technical Data

Technical Data
Material
PTFE (Teflon)
connection cable
Silikon, Teflon
Material rod
VA-Rohr, PTFE beschichtet
Operating temperature
max. +150 °C
media density
ρ ≥ 0,75 g/cm³
Switching system
Reed-Schalter
Contact
Wechsler, NO, NC
Inductive/capacitive loads
Unbedingt Kontaktschutz vorsehen
Ex-protection optional
Elektrische Daten siehe EG-Prüfbescheinigung IBExU10ATEX 1089
Reed contact
Switching current
1 mA ... 1 A
Switching voltage
24 ... 250 V AC/DC
Switching capacity
Max. 1A, 60 VA / 60 W
Switching hysteresis
ca. 100 mm
Switching angle
ca. +20°...–20°
Namur circuit (1kΩ/12kQ)
Switching current / switching voltage
nur zum Anschluss an KR-163... oder andere „Namur”-Relais
Switching hysteresis
ca. 100 mm
Switching angle
ca. +20°...–20°

QFS-55 configuration

QFS 1 - 2 - 3 - 4 - 5 - 6

1 Ausführung

  • 55 : Stabausführung

2 Kontakt

  • W : Wechsler
  • NO : aufschwimmend schließend
  • NC : aufschwimmend öffnend

3 Schaltkontakt

  • 3 : Reedkontakt
  • 4 : Namur-Beschaltung (1 kΩ / 12 kQ)

4 Kabelmaterial

  • FEP : Teflon
  • SIL : Silikon

5 Kabellänge

  • 01 : 1m
  • 02 : 2 m
  • X : Länge bitte angeben

6 Ex-Option

  • Ex : Ex-Schutz Ex II 2G Ex ib IIB T4 Gb
  • 0 : kein Ex

Further product information

When using 2 float switches, one working as a maximum contactor and the other as a minimum contactor, you achieve
automatic level control. In addition, the float switch can be used as overflow and dry run protection. The float of the QFS-55 float switch combination is made of Teflon. Inside the float, one or two reed contacts with a movable permanent magnet are inserted as switching element. The design of the switching element is such that even a slight displacement of the switching element from the horizontal triggers the switching operation.

Documents and Downloads

Similar Products

QFS-5x | QFS-6x

QFS-5x | QFS-6x

Teflon float switch for all kinds of liquids up to 150°C

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