The basic theory is that a leak creates a very high-frequency noise that can be monitored by an ultrasonic sensor. In a «non-leak» situation the ultrasonic pattern will be stable, but when a leak occurs the signature will change drastically. ClampOn’s DSP technology distinguishes and eliminates background noise unrelated to leakages so that the hiss from the leaks can warn the operator. The system also includes a program or data-base that helps to monitor and indicate the volume of the leak.
The ClampOn DSP Leak Monitor is the result of a joint venture project involving several participants in the petroleum industry.
The ClampOn DSP Leak Monitor is designed to be installed at critical points such as valves, flanges, joints, etc., and can monitor very small leakages. A pressure differential of as little as 1 bar can be monitored in gases, and 3 bar in liquids.
The ClampOn subsea sensors are designed to meet these requirements:
- Designed for a service life of more than 25 years
- Independent redundant electronics
- Independent high and atmosphere pressure chambers
- Electron beam (EB) welding of the chamber against external pressure (no rubber or mechanical seals)
- Glass-metal penetrator as a barrier between high and atmosphere pressure chambers
- Outstanding sensitivity, repeatability, accuracy and signal/noise ratio thanks to Digital Signal Processing (DSP)