Oil film detector LO-200 scans water surface with the laser and detects the film of oil.Because the oil is more reflective than the water, the intensity of light reflected from the oil will be greater than that from water surface.The LO-200 detects floating oil by sensing the difference in the intensity of reflection.
As compared with spotlight-based systems, The LO-200 adopted laser scanning method enables to operate more reliable against water surface level fluctuation, and widen distance between the water surface and the detector.
Usable with large water level fluctuation
The laser scanning will detect oil on water surfaces between 30 cm and 3 m from the detector, enabling use where there are surface waves or water level fluctuations.
Avoiding false alarms
False alarms due to waves or reflective floating matter can be avoided by adjusting the continuous detection time.
Resistance to interference from ambient light
Modulated light and a band-pass optical filter are used to eliminate interference from sunlight and other ambient.
In addition to detection of a film of oil or other liquid on water surfaces, the unit may be used for detection of oil, water, or other liquid on dry surfaces.
Easy to maintain
No adjustment necessary when the scanner unit is replaced.
Easy to install
The optical module is emplaced on a free-hanging assembly so that it corrects itself the optical axis to true vertical and does not require realignment if the unit shifts after installation.
|Subject of detection||Oil on water surface or liquid on floor|
|Detection method||surface scanning laser / reflected light sensor|
Semiconductor laser,wavelength (λ） 650 nm, output within 1 mW (class2)
|Mdulation laser frequency||Approx. 50 kHz|
|Scanning mechanizm||Oscillating mirror|
|Model 1||1.00 (no reflection) to 1.58|
|Model 2||1.33 (water) to 1.58|
|Leak detection||Detection cycle||1 sec. (fixed)|
|Continuous detection time (N)||1 - 99 sec. (adjustable at 1 sec. intervals)|
|Leak detection alert||Engages when current from light sensor exceeds threshold setting for N consecutive seconds.|
|Error||Malfunction||Engage when laser emission, laser scanning, or motor rotation fails|
|Abnormal light sensing||Engage when floating debris produces no reflection or abnormally strong reflection.|
|Output||Relay signal outputs (leak detected and error)|
Dry contact relay, form A and B; max.
|Current output||Intensity of light picked up by the sensor is converted to a 0 - 20 mA current signal.|
|Adjustments and displays||Light sensing level||Displayed with 17-LED bar indicating 0 - 20 mA|
|Leak detection current threshold||Displayed with 17-LED bar indicating 0 - 20 mA; adjusted by potentiometer dial|
|Continuous detection time||Adjusted with two rotary switches, one for 10 sec. increments and one for 1 sec. increments|
Green LED (RUN) indicates operation
|Power supply||AC 100 V ± 10 % 50 or 60 Hz signal-phase, 100 VA max. 27 w (typ.)|
|-10 to +50 ℃ (if water surface not frozen)|
|Weatherability||Water-tight construction for outdoor use|
|Materials / surface treatments||Cylindrical shroud||Alumite-treat aluminum, polyurethane finish|
|Display box||Alumite-treat aluminum, polyurethane finish|
|Finish color||Japan Paint Manufacturers Association U35-85B|
185 mm Φ × 535 mm H
|Weight||Approx. 14 kg|
|Attached cables||12 m, 1.25 mm sq., 3-wire power cable|
12 m, 0.5 mm sq., 6-wire shield sheath signal cable
Maximum 3 ° off true vertical
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