C-Level™ Sensor

Innovative Floatless Technology

c-level sensor

The innovative C-Level™ sensor provides continuous level monitoring in tank applications.

The simple and accurate C-Level™ sensor converts the water pressure in a tank into a low voltage electrical signal that is read by a variety of level monitoring products manufactured exclusively by SJE Rhombus. This innovative technology provides for continuous level monitoring for wastewater tank applications, confined space applications and systems with a high grease content.

C-Level™ sensor is available for these Level Monitoring Products:
c-level sensor


  • Operates on low voltage
  • Compact, non-moving design
  • One sensor replaces up to four floats
  • Easy to install
  • Available in cable lengths up to 300 ft. (91.44 m)
  • Excellent alternative to mercury floats
  • C-Level™ sensor models
    • CL40 – sensing range up to 40 inches (101.6 cm) for smaller tank applications
    • CL100 – sensing range up to 100 inches (254 cm) for larger tank applications
    • US Patent No. 8,567,242; 8,336,385; 8,650,949.
Two-year limited warranty


  • Input Power: 12 VDC 100 mA max.
  • Output: Variable Frequency Signal
  • 20 Gauge Cable, 300 feet (91 meters) maximum spliced length
    NOTE: Cable splicing permitted only if done in dry water proof enclosure and shielded wires are used.
  • Sensor Length: 5.0 inches (12.7 cm)
  • Sensor Diameter: 2.0 inches (5 cm)
  • Mounting: Stainless steel cable clamp on sensor housing
  • Fluid Compatibility’s: water, sewage
  • Maximum Submersion Depth Sensor: 10 ft. water (3 m water)
  • Maximum Environment Temperature: 120°F (50°C) wet or dry
  • Sensor Zero Point: Approximately 2 inches from bottom of sensor
  • Recommended Minimum Operation Level: 3 inches water measured from sensor zero point
  • Repeatability: +/- 5% full scale
  • Range: 40 inch or 100 inch (depending on model)
  • Sensor Housing
  • Material: PVC
  • Color: Black
  • Bellow design to increase surface area and reduce effect of temperature change
  • Oil filled to isolate sensor from sewage or corrosive environment
  • Jacket Type: Type CM 3 wire 20AWG with Shield
  • Jacket Material: PVC
  • Internal 0.12″ nylon vent tube
US Patent No. 8,567,242; 8,336,385; 8,650,949.

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