Heinrichs Messtechnik GmbH • Robert-Perthel-Straße 9 • 50739 Köln • Tel.: +49 (221) 49708-0 • info@heinrichs.eu
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Dual Magnet Float Level Switch
- Secure and wear-free sensitive switching by repelling magnets
- High switch capacity
- Very rugged for tough environments
- Pressure: up to 25 bar
- Medium temperature: up to 250 °C
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.
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
- 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
