Non-Intrusive PIG detection for pipeline integrity and monitoring
The ClampOn DSP PIG Detector is a cutting-edge, non-intrusive system designed to detect the passage of PIGs (Pipeline Inspection Gauges) in oil, gas, and multiphase pipelines. Using advanced ultrasonic acoustic technology, magnetic sensing and Digital Signal Processing (DSP), it delivers accurate, real-time detection - without requiring any modifications to the pipeline or the PIG itself. It is available in both topside and subsea versions. This innovative system combines ultrasonic acoustic detection with magnetic pig detection, ensuring reliable performance across all pig types.
What is PIG detection and why do you need a PIG detector?
PIG detection is the process of identifying when a PIG (Pipeline Inspection Gauge) enters, passes through, or arrives at specific points in a pipeline. PIGs are essential tools used for cleaning, inspecting, and maintaining pipelines in both offshore and onshore environments.
A PIG detector - also known as a PIG signaller - is used to confirm the PIG’s movement in real time. This is critical for:
1.Verifying successful PIG launch and arrival
2.Monitoring PIG passage at key points along the pipeline
3.Preparing receiving valves in advance
4.Detecting debris pushed ahead during cleaning
5.Avoiding lost PIGs and unplanned shutdowns
6.Enhancing pipeline integrity and operational safety
7.Reducing maintenance costs and downtime
Without a reliable PIG detection system, operators risk delays, safety hazards, and costly interruptions. The ClampOn DSP PIG Detector provides a proven, non-intrusive solution that ensures accurate, real-time PIG detection - improving both safety and efficiency.
How the ClampOn DSP PIG Detector works
The ClampOn DSP PIG Detector uses passive ultrasonic acoustics to “listen” for the unique sound signature of a PIG moving through the pipeline. The sensor is clamped directly onto the pipe surface - no welding, drilling, or shutdown required. It detects all PIG types, including scrapers, spheres, foam and smart/intelligent pigs.
With DSP technology, the sensor operates across multiple frequency ranges simultaneously, filtering out background noise from flow, valves, and mechanical impacts. This ensures precise detection in oil, gas, and multiphase environments.
Detection logic can be handled either within the sensor or via ClampOn’s software, which enables:
Real-time signal output: “PIG passed”
Full data logging and timestamping
Visual trending and debris monitoring
Remote configuration and diagnostics
Key benefits of the ClampOn DSP PIG Detector
Non-intrusive installation – No pipeline penetration; simply clamp onto the pipe
Real-time detection – Immediate alerts when a PIG passes
Detects all PIG types – Scrapers, spheres, foam and intelligent/smart PIGs, and more
Acoustic and magnetic sensing – Dual detection modes for reliability
Compact and lightweight – Easy to install and relocate
Plug-and-play setup – No field specialists required
Remote accessibility – Configure and analyze data from anywhere
Standalone or integrated – Operates independently or connects to control systems
Ex d / Ex i certified – Safe for hazardous environments
30-year design life – Built for long-term performance
Flexible integration – RS485, 4–20mA, DPDT relay, VFC outputs
Debris indication – Monitors debris pushed ahead during cleaning
Smart sensor technology – Enables advanced diagnostics and tuning
No production shutdown needed – Ideal for retrofit installations
Reliable PIG signaller functionality – Ensures accurate PIG passage confirmation
