Starting at $635.00
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  • Model AZ18 / AU18 Switch Pro Level Switch
  • Accuracy: ±1mm in water
  • Contact type: (1) SPST relay
  • Pressure: 150 psi (10 bar)
  • Polypropylene, Ryton® or PFA sensor
  • 60VA relay selectable NO or NC
  • Contact rating: AU18 / AZ18 60 VA, 1A max
  • Contact output: Selectable NO / NC
  • Process temp: -40 to 176°F (-40 to 80°C)
  • Enclosure rating: NEMA 4X (IP65)
  • Enclosure material: PP, UL94VO
  • Terminal strip: 6-pole, socket
  • Conduit entrance: 1/2” NPT
  • Wetted material:
    • AZ18-113X: PP-Ryton®
    • AU18-113X: PP
    • AU18-213X: PFA
  • Process mount: 3/4” NPT (3/4” G)
  • Repeatability: ±0.5mm in water


The Flowline AZ18 / AU18 Switch Pro Level Switch is intended for side wall installation, the general purpose level switch package provides reliable liquid level detection with one 1A relay and a compact junction box for integral wiring termination. Available in two level sensor technologies, select the type and material based upon your application media. This liquid level switch package is widely applied in bulk storage and process tank level applications as a high level alarm or low level alarm.

Additional features and benefits of the Flowline AZ18 / AU18 Switch Pro Level Switch include:

  • Rugged polypropylene, Ryton® or PFA sensor for corrosive liquid applications
  • 60VA relay selectable NO or NC via power supply wiring polarity
  • Polypropylene enclosure rated NEMA 4X with swivel base and terminal strip
  • Offered in 2 sensing technologies for broad application coverage: ultrasonic & vibration
  • Ideal for side wall tank mounting
  • Switch output wires directly into a PLC/SCADA
  • Can be installed outdoors
  • Great for corrosive or coating liquids