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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.
Model number LO-200
Subject of detection Oil on water surface or liquid on floor
Detection method surface scanning laser / reflected light sensor
Laser emitter

Semiconductor laser,wavelength (λ) 650 nm, output within 1 mW (class2)

Mdulation laser frequency Approx. 50 kHz
Scanning  mechanizm Oscillating mirror

Detection range
(refrractive index of scanned media)

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.
load is 4 A at 250 V AC or 30 V DC.

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
Operating lamps

Green LED (RUN) indicates operation
Yellow LED (ERR) indicates error, red
LED (ALM) indicates leak detected.

Power supply AC 100 V ± 10 %  50 or 60 Hz signal-phase, 100 VA max. 27 w (typ.)

Operating temperature

-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
External dimentions

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
Installation condeitions

Maximum 3 ° off true vertical
Use shade where necessary to avoid direct sunlight
Prevent freezing of scanned water surface
Use rain hood where necessary
Max. 3 m between detector and scanned surface