Ultrasonic leak detector OBSERVER-i

OBSERVER-i responds to airborne ultrasound generated by high pressure gas leaks in open and well-ventilated areas.

Key features:

• Artificial neural network (ANN) is able to distinguish noise from real gas leakage and suppress false alarms
• Senssonic ™ patented self-diagnosis technology ensures trouble-free operation
• Uninterrupted operation; inspection and calibration performed by one person
• Stainless steel case AISI 316L
• Explosion proof design (Ex-d)

Gas leak and acoustics

1. Gas molecules move from high pressure to low pressure
2. Whistling sound
3. Acceleration of the gas flow creates a " white noise" consisting of sound perceived by humans and ultrasound
4. Acoustic detectors filter out audible sound and only respond to sound with a frequency of 25 - 50 kHz - far from the sound that a person can hear
5. Gas leakage noise proportional to flow rate

Applications of ultrasonic gas leak detectors

• Instant detection of flammable gas leaks
• High pressure gas installations
• Ventilated and open air areas
• Explosive areas
• Stationary installations

Generations of ultrasonic gas leak detectors

First generation	Second generation	Third generation
Simple analog high-pass filters Suppression of low-frequency acoustic noise Trigger levels depend on background noise Detection range is reduced in high noise areas	Recognition of one pattern Each detector after installation must go through a training process Suppresses only certain acoustic background noise Trigger levels are still required Changing the background noise signature can lead to false alarms New training needed	Uses Advanced Neural Network (ANN) technology ANN algorithms are pretrained with real gas leak and background noise signatures No trigger levels required Maximum coverage in all areas Plug and play system and no re-training required

Additional materials: Booklet .