ClampOn

How it works

ClampOn PIG detection systems perform this operation in a simple and safe way as they only monitor the PIG from the outside of the pipe. The sensor is simply clamped onto the pipe, eliminating any need for welding or drilling during installation. There is no need for inserts in the PIG and the system is capable of detecting all types of PIGs or plugs.

PRINCIPLE OF OPERATION

The ClampOn DSP PIG Detector, based on our Ultrasonic Intelligent Sensor Technology, represents the latest state-of-the-art technology. This acoustic instrument accurately detects the passage of all types of PIGs in real time, giving instant warning to the operator. Its signal output can also be used to indicate the amount of debris pushed ahead by the PIG during pipeline cleaning operations. ClampOn PIG detection systems have been successfully tested and used by a large number of clients for many years, and this latest model makes the system even more compact and reliable. DSP (Digital Signal Processing) represents leading-edge technology in this field and keeps us ahead of the competition.

Advantages

The ClampOn DSP PIG Detector, available in topside and subsea versions, is a more compact and user-friendly unit than other instruments on the market. It is easier to install in the field and easier to move to other locations.

DSP involves complete digitalization of the system and the elimination of analogue filters. This technology is increasingly used in a wide range of “smart electronic devices” as it provides sufficient capacity to perform advanced signal-processing tasks in real time. Such devices include medical diagnostic instruments, radar and sonar systems and mobile phones. ClampOn is the only manufacturer of PIG detection systems to use DSP, which enables the sensor to operate in several frequency ranges simultaneously, eliminating the danger of the detector being triggered by noise sources other than PIGs.

Integration

Our PIG detector can be interfaced with the control system using either:

Digital RS485 interface
Analogue 4-20mA interface
Digital output, VFC (Volt Free Contact)

Detecting the PIG passing is done by detection criteria’s in the detector itself or using our computer software. There are also two sets of detection methods available, fixed threshold and percentage of signal. The latter is often used with unstable flow conditions.

It is recommended to use the digital interface (RS485) and a computer running our software for following reasons:

Detection criteria’s can easily be set in the software by an operator.
All data will be logged and all PIG passing will be recorded and time stamped.
Trends will be available for correct calibration of detection.
Method of detection can quickly be changed if needed.

Product specifications

PIG DETECTOR
Principle of operation	Passive acoustics, intelligent sensor
Type of PIG	All types
Minimum PIG Speed	0.03 meter per second
Method of installation	Clamped to pipe surface, non-intrusive
Sensor electronics	Intelligent DSP electronics with signal processing
Interface options	All sensors can be supplied with: Digital RS485 (ASCII, binary, ModBus RTU), 4-20mA (active/passive), Relay/reset Options for ATEX approved sensors: local light/reset Options for subsea: CANBus, Profibus, Relay, reset Other functions available: Vibration monitoring, sensor selftest
Two-way communication	Yes
Software upgrading	Yes
Pipe Surface Temperature	-40 to 225 °C (-40 to 437 °F)
High temperature fixture	500 °C (932 °F)
Flow regimes	Oil, gas, water, multiphase
Diagnostic features	Self test, vibration, 0.25Hz - 1000Hz ±5G


COMPUTER
Minimum hardware	Pentium III (or equivalent) with 512 MB RAM
Software requirements (for Clampon Software)	Windows™ XP/Vista/2000-2008
Input	Serial, Modbus, ethernet, OPC
Signal output	Serial, Modbus, ethernet, 4-20mA, Relay, Client Server


SAFE AREA EQUIPMENT
Mains power supply	12 - 48 VDC or 100-260 VAC 50-60 Hz
Power consumption	Max 2.1 W per detector + computer rack module

INTRINSICALLY SAFE ( IS) APPROVAL
ATEX	II 1 G EEx ia IIB T2–T5, Zone 0 II 2 G EEx de/dem IIC T5, Zone 1
CSA C&US	Ex ia IIB T5, Class I Division 1 Group C,D, Zone 0
GOST-R / GGTN	2Ex dem IIC T5, Zone 1
INMETRO	BR–Ex ia IIB T2–T5, Zone 0 BR-Ex de/dem IIB T5, Zone 1
Ingress protection	Ex ia: IP68, Ex ia with light/reset: IP67, Ex de: IP68, Ex dem with light/reset: IP66

Why Choose ClampOn

ClampOn - the leading supplier of topside and subsea Ultrasonic Intelligent Sensors

ClampOn has since the beginning in 1994 grown to be the largest supplier of passive ultrasonic systems for sand/particle monitoring to the international oil and gas sector.

All products supplied by ClampOn, particle monitor, PIG detector, corrosion-erosion monitor, vibration monitor and leak monitor are based on the same, well proven technology platform. Both the topside and the subsea instruments incorporate Digital Signal Processing (DSP), complete digitalization eliminating analogue filters, circuits and amplifiers.

The ClampOn Ultrasonic Intelligent Sensor processes all data in the sensor itself (patented principle), thus enabling the instrument to discriminate between sand-generated and flow-generated noise. This is of importance to the user since changes in flow rates and the gas/oil ratio will not affect the performance of the system.

A good signal to noise (s/n) ratio is vital for quality measurements of this sort, and ClampOn’s sensors are the very best in this respect. With the new version, the external noise has been completely eliminated.
The sensors has memory capacity for storing up to 60 days of data, and can even be reprogrammed between being a sand monitor, a PIG detector or a leak monitor.

ClampOn Ultrasonic Intelligent Sensor

• Non-invasive
• Digital Signal Processing (DSP)
• Complete digitalisation
• No analogue filters, circuits or amplifiers
• Two-way communication
• Real-time measurement
• Easy to relocate
• Contains no moving parts
• Can be mounted in hostile environments
• Incorporates sensitive, intelligent, intrinsically safe sensors
• Can be upgraded by software download
• Can store up to 60 days of measurement data within the sensor itself
• Self-testing capabilities
• Built-in temperature sensor and accelerometer (optional)
• User-friendly software for Windows™ XP/Vista/2000-2008
• Versatile - one and the same sensor can perform particle detection, PIG detection, spectrum analysis and more, all available in the software package of your choice.

Brochure download

ClampOn DSP PIG Detector Brochure