Oil analyzer CRAB

watervegetableoil content

About
CRAB is an easy-to-operate active optical detector for identifying oil films on water surfaces. The instrument uses a vertical laser beam to compare reflection properties of clean water and oil films, enabling detection of any oil type regardless of composition, viscosity or density.

Method
Remote optical sensing of the water surface using a vertical laser beam.

Principle of operation
Detection is based on differences in light reflection between water and oil-covered surfaces.

Features and benefits

• Continuous remote optical sensing—no sampling required
• High sensitivity: detects oil films down to 0.5 μm thickness
• Detects mineral, synthetic and vegetable oils
• Unaffected by scattered ambient radiation
• Low sensitivity to ripples and waves (beam/surface angle up to ±20°)
• Waterproof enclosure for outdoor installation
• Optional sensor heating available
• Mounting on fixed points, buoys or motorboats
• Detection accuracy independent of mounting height
• Designed for long-term operation with minimal maintenance

Applications

• Monitoring of seas, harbors, lakes and rivers
• Leak and spill detection
• Process and wastewater monitoring

Equipment and options

• Oil-slick optical detector CRAB
• Power supply unit for AC 100–240 V mains (optional)

Warranty
CRAB detectors are covered by a 1-year warranty.

Services
Installation and commissioning can be performed on-site by the manufacturer's service engineers or by certified distributor engineers.

Specifications
Detecting object: Oil slick on water surface
Minimum detectable oil film thickness: 0.5 μm
Permitted waviness (RMS wave slope): up to 20°
Measurement mode: Continuous
Response time: ≤ 10 s
Communication ports: RS-485; 4–20 mA current loop
Data protocols: Modbus RTU; analogue 4–20 mA
Power supply: 100–240 V, 50–60 Hz; 12 VDC
Power supply cable length: up to 200 m (100 m for heated sensor option)
Power consumption: up to 15 W
Ambient temperature range: -10 to +50 °C (optionally -20 to +50 °C)
Humidity: up to 100% (rain)
Distance to water surface: 0.5–10 m
Dimensions: ≤ 200 x 300 x 146 mm
Weight: up to 3.5 kg

Technical specifications

• Detecting object: Oil slick on water surface
• Minimum detectable oil film thickness: 0.5 μm
• Permitted waviness (RMS wave slope): up to 20°
• Measurement mode: Continuous
• Response time: ≤ 10 s
• Communication ports: RS-485; 4–20 mA current loop
• Data protocols: Modbus RTU; analogue 4–20 mA
• Power supply: 100–240 V, 50–60 Hz; 12 VDC; cable length up to 200 m (100 m for heated option)
• Power consumption: up to 15 W
• Ambient temperature: -10 to +50 °C (or -20 to +50 °C optional)
• Humidity: up to 100% (rain)
• Distance to water surface: 0.5–10 m
• Dimensions: ≤ 200 x 300 x 146 mm
• Weight: up to 3.5 kg