Description

What Is a Non Intrusive Pig Signaler?

A non intrusive pig signaler is an external sensor that confirms a pipeline pig has passed a point. Unlike intrusive probes, it never penetrates the pipe wall. Instead, it clamps onto the outside of the line. As a result, the pressure boundary stays fully intact.

Operators use this device during cleaning, batching, and inline inspection runs. The signal tells your team exactly when the pig arrives. In contrast, a welded detector requires a branch and a hot-tap.

 

Technical Specifications

Parameter	Specification
Pipe Diameter	2″–48″ (DN50–DN1200)
Detection Method	Magnetic field / Acoustic emission
Mounting	Clamp-on magnetic base or chain strap
Signal Output	LED, audible buzzer, 4-20mA, dry-contact relay
Power Supply	24VDC or rechargeable battery
Operating Temp	-40°C to +80°C (-40°F to +176°F)
Housing	IP67 aluminum / 316 stainless steel
Certification	ATEX / IECEx (optional)
Pipe Material	Carbon steel, alloy, coated lines

How Does it Work?

The unit uses magnetic or acoustic sensing to detect the pig. The pig carries a magnet or changes flow noise as it travels. The sensor reads that change through the pipe wall. Then it triggers a LED, buzzer, or 4-20mA signal. Therefore, your control room tracks the pig’s location in real time.

Sensitivity is adjustable to your wall thickness and pig strength. Specifically, we tune each unit to your pipe and pig specification before shipment. As a result, false triggers drop and detection stays reliable.

Gas lines cannot stop easily. A non intrusive pig signaler for gas pipeline avoids hot-tapping the live line. In contrast, int

Why Choose This  Product?

rusive detectors need a welded branch and a shutdown window. Our clamp-on design mounts in minutes with no production loss. Additionally, it is reusable across multiple sites.

EMT is both a pig signaler manufacturer and a non intrusive pig signaler supplier. We build, test, and certify each unit in-house. Therefore, you get factory pricing and direct technical support from one source.

Key Features

• Clamp-On Mounting— Mounts magnetically to the pipe with no weld, hot-tap, or shutdown.
• Live-Line Safe— Built as a non intrusive pig signaler for gas pipeline and liquid lines under pressure.
• Multi-Signal Output— Sends LED, audible alarm, 4-20mA, and relay contact to your control system.
• Wide Diameter Range— Fits 2″ to 48″ (DN50–DN1200) lines with adjustable straps.
• Hazardous-Area Certified— ATEX/IECEx options for Zone 1/2 gas pipeline environments.
• Rugged Housing— IP67 aluminum or 316 stainless steel survives field and coastal conditions.
• Reusable & Portable— Move the unit between pigging sites without recalibration.

FAQ

What is the product used for?

It confirms a pig has passed a point without opening the line. Operators use it to track pig location during cleaning, batching, or inspection. It is common on gas transmission and liquid pipelines.

How accurate is an external pig detector?

Accuracy depends on wall thickness, pig magnet strength, and coating. In practice, it detects passage within seconds at the sensor point. We tune sensitivity to your pipe and pig spec.

Do you supply as a non intrusive pig signaler manufacturer or only resell?

EMT is a non intrusive pig signaler manufacturer and supplier. We build, test, and certify each unit in-house. Therefore, you get factory pricing and direct technical support.