Level- and temperature switch Nivovent NV 71, NV 71D

The oil tank is the key component of hydraulic and lubrication systems. The operating oil is removed from the tank and then returned to it. Depending on what the system is used for, the levels in the oil tank can fluctuate to varying degrees. In most applications, the level fluctuations result in an exchange of the vapor phase above the oil level with the ambient air. Therefore, virtually all oil tanks are equipped with a so-called air breather, to prevent contaminants in the ambient air from entering the system. To reduce costs and space requirements, a number of other system-related functions such as liquid level and temperature monitoring are also combined in the air breather in the Nivovent series.


NV 71

  • Connecting flange as per DIN 24557 Part 2.
  • Qualified vent filter with the replaceable element.
  • Various plug options.
  • Proven and tested highly dynamic float system.
  • Sensor length up to 1.5 m (longer upon request).
  • Suitable for up to 230 V DC.

NV 71D

  • LED display with switching output status.
  • Qualified vent filter with the replaceable element.
  • Visual air breather monitoring optional.
  • Two switching outputs are configurable as frequency output (1-100 Hz).
  • Standard menu structure based on VDMA standard specification 24574 ff.
  • Min/max value memory, logbook function.

Operating pressure : Max. 1 bar
Operating temperature : -20 °C to +80 °C
Float : SK 610
Lengths (all versions) : 280, 370, 500, 670, 820, 970, 1120, 1270, and 1420 mm
Display housing : Display housing


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