The Levelite GLL110118 Electro Optic Probe is a non-contact infrared sensor for liquid level detection and leak identification in industrial systems. It operates by sensing changes in infrared light reflection—dry probe conditions reflect light back to the photodetector, while liquid immersion absorbs the light and triggers an output signal change. The polysulfone construction with conical probe tip detects liquids regardless of conductivity, color, or specific gravity, making it suitable for transparent and translucent media across food, pharmaceutical, chemical, and semiconductor applications. The probe integrates with all Electro Optic Controllers via universal level alarm or pump control modules, featuring adjustable time delay and field-selectable fail-safe settings. Standard configuration includes 25 ft (7.62 m) of user-extendable PVC jacketed cable.
Technical Specifications
Sensing Technology: Electro-Optic Infrared
Probe Material: Polysulfone
Probe Geometry: Conical tip design
Operating Temperature Range: −20°F to 200°F (−29°C to 94°C)
Maximum Operating Pressure: 100 psig (7 kg/cm²)
Cable Length: 25 ft (7.62 m), user-extendable
Cable Jacket: PVC
– Key Features
• Non-contact detection eliminates mechanical wear and false triggers from foam or turbulence
• Responds to liquid presence independent of electrical conductivity, eliminating false positives in pure or low-conductivity fluids
• Conical probe geometry optimized for light reflection differentiation
• Field-selectable fail-safe logic for safety-critical applications
• Adjustable time delay filters transient conditions
• 1/2″ NPT conduit connection; process connections available in 1/2″ NPT or 1 1/2″ Tri-Clover sanitary flange configurations
• Wide temperature operating window accommodates cryogenic and elevated-temperature processes
– Typical Applications
• Precision leak detection in dual-containment piping and diked areas
• Oil level monitoring in gearboxes
• Liquid/gas phase change detection in refrigeration systems
• Chemical dispensing and process control
• Ultrapure water and treated water systems
• Beverage, food, and pharmaceutical processing
• Semiconductor and pharmaceutical manufacturing environments
• Electronic enclosure and equipment protection
– Compatibility & Integration
The GLL110118 probe operates with all Levelite Electro Optic Controllers. Associated control modules provide universal level alarm or pump control functionality with NEMA 4X (IP 66) rated electronics enclosures.
