Sensors and Sensing Systems

LLS-01 Liquid level sensor

Type: Customable sensor for a wide pressure range (0-20 bar), IP68

Application: water height monitoring, hazardous environment monitoring, geotechnical, marine, etc.

Installation method: Mounting brackets – weldable, screwable

Temperature compensation: Integrated

  • Liquid and gaseous environment applicability
  • Relative or absolute pressure measurement.
  • Customizable for different pressure ranges (1, 4, 7, 10, 15 and 20 bar)
  • 2-fiber port configuration allowing for chain formation with a variety of FBG-based sensors on single fiber line
  • Ruggedized housing suitable for harshenvironments
  • Extremely small drift (<0.5%FS/year)
  • Very high accuracy and stability
  • Water height monitoring
  • Pore water pressure measurements
  • (Hazardous) tank monitoring
  • Geotechnical applications
  • Marine & offshore applications
3D View
Loading file
  • Fullscreen
  • Wireframe
  • Zoom In
  • Zoom Out
  • Rotation
  • Screenshot
  • Help


  • Rotate with the left mouse button.
  • Zoom with the scroll button.
  • Adjust camera position with the right mouse button.
  • Double-click to enter the fullscreen mode.
  • On mobile devices swipe to rotate.
  • On mobile devices pinch two fingers together or apart to adjust zoom.
  • On mobile devices 3 finger horizontal swipe performs panning.

Product specification

Performance properties
Measured parameter
relative or absolute pressure 1)
Pressure range
1-20 bar 2)
Operating temperature range
-20°C to +60°C
0.1% FS 3)
<1% FS 3)
<0.5 % FS 3)
Pressure sensitivity (1bar range)
Operating humidity range 0 – 95 % Relative Humidity
Burst pressure
up to 150 % FS 3)
Measurement rate
up to 100 measurements/second 2)
Occupied bandwidth
Ingress Protection rating
IP 68
Physical properties
Housing material4)
Stainless steel SS316L
Dimensions without cable
 Ø30 x 164 mm
Weight (without cable)
550 g
Cable type5)
7mm reinforced cable / 6mm PA12 (Nylon) tube
Cable length6)
Cable Bend Radius (dynamic)
80 mm
Cable Bend Radius (static)
70 mm
Connector type7)
Pressure inlet thread
Porous stone 8)
Optional – upon request
Packaging Cardboard box with dimensions: 370x290x45mm
Quality Statement The sensor is compliant with IEC 61757:2018 and IEC 61757-2-1:2021. All sensors are 100% tested and calibrated at SYLEX. Sensor is manufactured according to ISO 9001:2008 and ISO 14001:2004


1)Absolute pressure sensor available upon request 2)Standard configuration includes pressure ranges: 1, 4, 7, 10, 15, and 20bar 3) FS: full-scale range 4) Other housing materials are available on request 5) For liquid level monitoring, the LLS-01 will be equipped with a cable with air channels connected to the sensor through a bottle splice 6) Cable length is extendable on request 7) Other connector types available on request 8) MG40 316 sintered stainless steel (high permeability)

Related products

WCP-01 is a IP67 watertight connector protection for FC/APC connectors

LCP-03 is an optional product modification for extending sensors cable lengths.

Fill out the form below, and we will be in touch shortly.

Join our Mailing list!

Get all latest news, exclusive product release and company updates.