NS 25/15 AM-Atex, NS 25/25 AM-Atex series

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For more than 50 years the employees of Bühler Technologies have been have been developing, manufacturing and distributing components and system solutions in the “Gas Analysis“ and “Fluidcontrol“ divisions.

We offer flexible, system-compatible sensors and devices with state-of-the-art output signals for liquid level, temperature and pressure monitoring as well as for filter and moisture monitoring in hydraulic-systems. With the oil-water and oil-air coolers, filtering units and customer-specific subsystems, we meet today’s requirements in terms of a cost-effective and reliable operation of oil installations, even in hazardous areas. The Bühler Fluidcontrol product line extends the service life of oil and components, provides connectivity for automated operation, facilitates condition monitoring and helps reduce operating and maintenance costs.

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Put your trust in Bühler Technologies – your specialist for Gas Analysis and Fluidcontrol.


  • ATEX – application Zone 1 (cat. 2G), intrinsically safe as per EN 60079-11
  • Compact size
  • Variable connections
  • Visual display
  • Practice-oriented contacts
  • Sturdy design

Level switches for external installation are used to monitor and control liquid levels primarily in closed tanks. The lowest detectable level is located on the level of the top edge of the bottom connection.

Each AM switch is equipped with a display, which is even easy to see from various lines of sight. The level contacts can be infinitely adjusted on the scale plate. They are activated by the magnetic system integrated in the float. There is a large selection of contacts available for various applications. This series consists of simple electrical equipment. In the case of intrinsically safe connections as per EN 60079-11, the NS 25/15 (25) AM-Atex can be used in Zone 1 (group IIB, device category 2G) explosive areas; this also applies to the inner zone of the tank. The level switches are classified into temperature class T4.

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NS 25/15 AM-Atex, NS 25/25 AM-Atex series

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