Dual Magnet Float Level Switch
Type: NGS

As the level rises and falls the inclination of the float is changed causing a permanent magnet in the float to be deflected which in turn repels a rotatable opposing magnet. This forced snap-action-contact effect operates a microswitch with a plunger. Even very small changes in level can be detected in this way.

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NGS - Zweimagnet – Füllstandsschalter.

Details

Applications

Control and monitoring liquid levels in open and closed vessels, especially:

  • Min. or Max. monitoring of liquid levels
  • Monitoring and controlling a continuous
  • liquid level
  • When only side installation is possible due to lack of space or considerations of cost
  • When a very rugged monitoring device is needed for tough environments
Special features

Special Advantages

  • Secure and wear-free sensitive switching by repelling magnets
  • High switch capacity up to 10 A with microswitch
  • Very rugged for tough environments
  • No regular maintenance necessary
  • Medium temperature up to 250 °C
  • Wetted parts made of high-quality stainless steel
  • No auxiliary power necessary
Technical data

NGS-_1, horizontal mounting, fixed differential

  • Nominal pressure: 25 bar
  • Installation position: from side
  • Differential: fixed

NGS-_2, horizontal mounting, adjustable differential

  • Nominal pressure: 25 bar
  • Installation position: from side
  • Differential: adjustable

NGS-23, top mounting, adjustable differential

  • Nominal pressure: 16 bar
  • Installation position: from above
  • Differential: adjustable

Temperature of medium:

  • NGS-2 -40 … +250 °C
  • NGS-4 -20 … +80 °C
  • NGS-5 0 … +100 °C
  • NGS-6 0 … +200 °C
  • NGS-7 0 … +80 °C
  • NGS-8 0 … +80 °C

Ambient temperature: -20 °C … +80 °C

Temperature for ATEX version

  • process temperature
    • T6: 80 °C
    • T5: 95 °C
    • T4: 130 °C
    • T3: 200 °C
    • T2: 250 °C
  • Ambient temperature
    • T6: -20…+60°C
    • T5: -20…+70 °C
    • T4: -20…+80 °C
    • T3: -20…+80 °C
    • T2: -20…+80 °C
  • Except:
    • NGS-51 Tmedium : 0…+100 °C
    • NGS-61 Tmedium : 0…+200 °C

Min. medium density: > 0,7 kg/dm3

Wetted parts: stainless steel 1.4571 (NGS-5…: rubber, NGS-6…: silicone rubber)

Housing material: aluminium, colour coated

Flat gasket: Klingerit

Process connection:

  • square flange
  • DIN-Flange
  • 2″ BSP
  • 2″ NPT

Switching element: 1 microswitch with 1 closing and 1 opening contact (NO and NC)

Switch rating:

  • 250 V AC, 10 A, 220 VDC, 0,6 A
  • Ex: 250 V AC/2,5 A; 220 VDC/0,3 A

Electrical connection:

  • M20 x1,5 for NGS-2, NGS-5, NGS-6
  • integrated cable for NGS-4, NGS-7, NGS-8

Ingress protection:

  • standard version: NGS-2, NGS-5, NGS-6: IP 65
  • submersible version: NGS-4, NGS-7, NGS-8: IP 68 (max. 20 m WC)

ATEX approval:

II 1/2 G Ex de mb IIC T6…T2

Ga/Gb

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