Intended for side wall installation, the general purpose level switch package provides reliable liquid level detection with a 16A compact level controller for pump or valve control. The optional flash alarm brings attention to alarm conditions. Offered 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 for high level control or low level control.


  • Rugged PP-Ryton® or PFA sensor for corrosive liquid applications
  • Fail-safe relay control of pumps or valves with 0-60 second delay
  • PP enclosure rated NEMA 4X with swivel base for conduit alignment
  • Optional strobe brings immediate attention to level alarm conditions
  • Invert switch changes relay state from NO to NC without rewiring
  • Offered in two sensor technologies for broad application coverage


P/N Description From
AU13-1110 Ultrasonic, PP, w/strobe, 3/4″ NPT $1,010.00
AU13-1114 Ultrasonic, PP, w/strobe, 3/4″ G $1,040.00
AU13-1120 Ultrasonic, PP, 3/4″ NPT $835.00
AU13-1124 Ultrasonic, PP, 3/4″ G $865.00
AU13-2110 Ultrasonic, PFA, w/strobe, 3/4″ NPT $1,190.00
AU13-2114 Ultrasonic, PFA, w/strobe, 3/4″ G $1,240.00
AU13-2120 Ultrasonic, PFA, 3/4″ NPT $1,015.00
AU13-2124 Ultrasonic, PFA, 3/4″ G $1,065.00
AZ13-1110 Vibration, PP, w/strobe, 3/4″ NPT $1,030.00
AZ13-1114 Vibration, PP, w/strobe, 3/4″ G $1,060.00
AZ13-1120 Vibration, PP, 3/4″ NPT $855.00
AZ13-1124 Vibration, PP, 3/4″ G $885.00


Select ultrasonic for chemicals and light weight oils or vibration for wastewater with light coating or scaling.



Accuracy: ± 1mm in water

Repeatability: ± 0.5mm in water

LED indication: Sensor, power & relay

Supply voltage: 120 / 240 VAC @ 50-60 Hz.

Consumption: 0.25A maximum

Strobe type: -X12X: N/A, -X11X: Xenon tube

Strobe flash: -X12X: N/A, -X11X: (1) per second

Contact type: (1) SPST relay

Contact rating: 250 VAC @ 16A

Contact output: Selectable NO / NC

Contact delay: 0-60 seconds

Process temp.: F: -40° to 176°, C: -40° to 80°

Ambient temp.: F: -40° to 140°, C: -40° to 60°

Pressure: 150 psi (10 bar) @ 25º C, derated @ 1.667 psi (0.113 bar) per ºC above 25º C

Enclosure rating: NEMA 4X (IP65)

Enclosure mat.: -X11X: PP, UL94VO & PC, -X12X: PP, UL94VO

Conduit entrance: 1/2” NPT

Wetted material: AZ13-11XX: Ryton®, AU13-11XX: PP, AU13-21XX: PFA

Process mount: 3/4” NPT (3/4” G)

Mount. gasket: Viton®

Classification: General purpose

Compliance: CE