The general purpose optic leak switch provides liquid leak detection in and around secondary containment sumps, tanks and piping systems with a 1A relay output. Media examples include sulfuric acid and sodium hypochlorite. The submersible PP or PFA leak switch sensor is mounted through the containment wall or within the interstitial space, and connected to a PLC or relay controller.


  • Rugged polypropylene or PFA Teflon® sensor and cable for corrosive liquids
  • 60VA SPST relay selectable NO or NC via power supply wiring polarity
  • Sensor may be located up to 1000’ from a Flowline relay controller


P/N Description From
LO10-1305 PP, short, 3/4″ NPT $200.00
LO10-1325 PP, short, 3/4″ G $220.00
LO10-1405 PP, long, 3/4″ NPT $220.00
LO10-1425 PP, long, 3/4″ G $240.00
LO10-2305 PFA, short, 3/4″ NPT $360.00
LO10-2325 PFA, short, 3/4″ G $400.00
LO10-2405 PFA, long, 3/4″ NPT $400.00
LO10-2425 PFA, long, 3/4″ G $440.00


Sensors and PodView indirectly, are configurable via our free WebCal PC software and one Fob USB adapter. Sensors are offered with and without Fobs. Fobs are universal and can be used to configure any WebCal compatible product. Download your free copy of WebCal in English or Chinese.


Orientation: Universal

Accuracy: ± 1mm in water

Repeatibility: ± 0.5mm in water

Supply voltage: 12-36 VDC

Consumption: 25 mA maximum

Contact type: (1) SPST relay

Contact rating: 60 VA, 1A maximum

Contact output: Selectable NO / NC

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

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

Sensor rating: -1XX5: NEMA 6 (IP68), -2XX5: NEMA 4X (IP65)

Sensor material: -1XX5: PP, -2XX5: PFA

Cable jack. mat.: -1XX5: PP, -2XX5: PFA

Cable type: 4-conductor, shielded, #22 AWG

Cable length: 10’ (3m)

Process mount: 3/4” NPT (3/4” G / Rp)

Mount. gasket: Viton® (G version only)

Classification: General purpose

Compliance: CE


For pump, valve or alarm automation, package your leak detection switch with our remote leak controller.


If you want help in selecting a sensor for your application, please submit a Level Questionnaire. An engineer will review your requirements and suggest a product solution via email.