Pig Passage Signalers
Intrusive & Non-Intrusive Detection Solutions
A complete family of signalers for reliable pig passage detection across onshore, offshore, and subsea pipelines
The Pig Signaler Family
TUBE TURNS® offers two proven approaches to pipeline pig passage detection — choose the mechanical Sig-Tech intrusive signaler, the magnetic CD52 Bandit non-intrusive signaler, or both to suit your application and operating philosophy.
Sig-Tech
Mechanical trigger pig passage signaler
A field-proven intrusive signaler with a trigger that extends into the pipeline through a welded boss. Ideal when direct mechanical contact detection is preferred.
- Intrusive trigger design
- Flag, electrical, or combination signaling
- Install under operating pressure
- Weather and corrosion resistant
CD52 Bandit
Non-intrusive magnetic pig passage signaler
A non-intrusive magnetic signaler that bands to the outside of the pipeline — no hot-tap, no pipeline penetration, no leak risk. Installs in minutes and detects any pig moving between 0.01 and 20 m/s.
- Non-intrusive — no pipeline penetration
- Installs in minutes, no hot-tapping
- Pipelines from 2 in. to 60 in. diameter
- ATEX, IECEx, CSA-UL certified options
Sig-Tech Pig Signaler
The Sypris® Technologies Sig-Tech intrusive Pig Signaler is installed at pre-determined intervals to detect the passage of cast polyurethane and spherical type pigs. A trigger extending into the pipeline through a welded boss fitting trips when a pig passes, immediately activating the signaling mechanism.
Intrusive Design
Trigger extends into pipeline through welded boss fitting for reliable detection
Easy Installation
Can be installed under operating pressure with correct tools
Weather Resistant
Designed to function in demanding onshore or offshore environments
Immediate Activation
Trigger trips when pig passes, immediately activating signaling mechanism
Signaling Mechanisms
Flag Indicator
Visual flag indication for pig passage detection
- Visual confirmation
- No power required
- Clear indication
- Weather resistant
Electrical Indicator
Electrical switch activation with 316SS construction
- 316SS construction
- Electrical signal output
- Remote monitoring capable
- Corrosion resistant
Combination Flag/Electrical
Dual indication system with both visual and electrical signals
- Dual indication
- Visual and electrical
- Redundant confirmation
- Maximum reliability
Installation & Design
The Sig-Tech signaler does not require any adjustments after installation. The boss is designed per wall thickness requirements and set to the correct intrusion depth.
The signaler is compatible with other popular brands and can be installed using equivalent tools — ensuring easy integration into existing pipeline systems and maintenance procedures.
The electrical switch is offered standard with 316SS construction for maximum corrosion resistance and reliability in harsh pipeline environments.
Sig-Tech Specifications
Design Type
Intrusive trigger mechanism
Installation
Welded boss fitting
Signaling Options
Flag, Electrical, Combination
Switch Construction
316SS (Electrical models)
Environment Rating
Weather and corrosion resistant
Installation Pressure
Can install under operating pressure
Signaler Components
Installation Detail
CD52 Bandit Non-Intrusive Pig Signaler
For over fifteen years, the CD52 Bandit has meant simple, reliable, and durable pipeline pig passage detection in the world's most demanding environments. Non-intrusive means less maintenance and corrosion — and zero possibility of pipeline leaks from the signaler.
Non-Intrusive
Detects pig passage without penetrating the pipeline. Less maintenance, no corrosion risk, and zero possibility of pipeline leaks.
Quick & Easy Install
No hot-tapping required. Bands to pipelines from 2 in. to 60 in. (50–1,524 mm) diameter and can be installed in minutes by any field technician.
Field Proven
Over fifteen years of service with thousands of systems installed globally — from burning deserts to frozen tundras.
Noise-Canceling Antennas
Patented proprietary non-intrusive antenna system rejects nearby magnetic noise and halts costly false-positive triggering.
Line or Battery Power
Two standard D-Cell alkaline batteries provide a full year of service, or 24 VDC line power for indefinite operation.
SCADA Ready
Dry-contact relays (NO/NC) integrate the Bandit into existing pipeline control and signaling networks.
Bandit Variants
Configure the right Bandit for your pipeline — from standard onshore applications through deepwater subsea deployment.
Standard Aluminum
The base CD52 Bandit configuration in aluminum housing — the workhorse for most onshore pipeline applications.
316 Stainless Steel
Corrosion-resistant 316 stainless construction for harsh offshore, desert, and chemically aggressive environments. ATEX, IECEx, and UKCA rated.
Subsea CD52-A30 / A45
Chrome duplex stainless steel subsea signalers rated for depths up to 3,000 m (A30) or 4,500 m (A45) with ROV fishtail handle and nylon ratchet straps.
Portable
Rapidly deployable portable configuration — ideal for temporary monitoring, commissioning, and spot-checks along a line.
Flex Cable Extension
Separates the electronics from the sensor using flex cable in 10 ft (3 m) increments up to 140 ft (42.7 m) — useful for buried, insulated, or hard-to-reach lines.
Rigid Pipe Extension
Carbon steel rigid stalk available from 12 in. to 180 in. to raise the indicator above grade, snow, or insulation for visibility.
Options & Accessories
Tailor the Bandit to your site conditions and remote-monitoring needs.
Stainless Steel Sun Shade
Protects the Bandit from intense sunlight, reducing internal temperature and prolonging component life.
Heater System
Recommended for operation in extreme cold — rated for temperatures below −22°F (−30°C).
Remote Indication System (RIS)
Array of four high-luminosity LEDs providing visual passage indication at distances up to 328 ft (100 m).
LineStat Satellite Radio
Transmits passage time, date, and GPS location via email or SMS message — perfect for remote pipelines.
Bandit Specifications
- Operational Principle
- Non-intrusive passive magnetic
- Sensor
- Noise-canceling wire-wound antennas
- Detected Devices
- Permanent magnet or electromagnetic transmitter
- Detection Speed
- 0.01 m/s to 20 m/s
- Travel Direction
- Bi-directional
- Pipeline Diameters
- 2 in. to 60 in. (50 mm to 1,524 mm)
- Pipe Wall Thickness
- 1.5 in. (38.1 mm) maximum*
- Power
- Two 1.5 VDC alkaline D-cells or 24 VDC external
- Battery Life
- One full year minimum
- Housing
- Aluminum standard, or 316L stainless steel
- Window
- Tempered glass
- Conduit
- ¾-in. NPT or M20 metric
- Visual Indicator
- LCD blinks 1 hr; steady 11 hrs; auto-reset at 12 hrs
- Electrical Indicator
- Isolated dry-contact closure relays
*Where pipe wall thickness exceeds 1 in. (25.4 mm), a custom magnet may be required. Consult TUBE TURNS® for an evaluation of deployment options.
System Certifications
The CD52 Bandit is available with either ATEX/IECEx or CSA-UL certifications.
Intrusive vs. Non-Intrusive
Side-by-side comparison of the Sig-Tech and CD52 Bandit signalers to help you choose the right solution.
| Feature |
Sig-Tech (Intrusive)
|
CD52 Bandit (Non-Intrusive)
|
|---|---|---|
| Detection Method | Mechanical trigger (intrusive) | Magnetic sensing (non-intrusive) |
| Pipeline Penetration | Yes — welded boss fitting required | No — bands to outside of pipe |
| Hot-Tap Required | Yes, for retrofit installs | No |
| Install Time | Requires boss preparation | Minutes, by any field technician |
| Pipe Diameter Range | Per boss specification | 2 in. to 60 in. (50–1,524 mm) |
| Compatible Pigs | Cast polyurethane, spherical | Any pig with magnet or transmitter |
| Signaling Output | Flag, electrical, or combination | LCD, dry-contact relays, optional LEDs / satellite |
| Power | Passive (flag) or externally powered | Battery (1 yr) or 24 VDC line |
| Subsea Capable | No | Yes (CD52-A30/A45 to 4,500 m) |
Compatible Pig Types
Both signalers reliably detect a wide range of pig configurations used in modern pipeline operations.
Cast Polyurethane Pigs
Cleaning and inspection pigs — detected mechanically by Sig-Tech or magnetically (when fitted with a magnet) by the CD52 Bandit.
Spherical Pigs
Commonly used in multi-product pipelines for batching and product separation — compatible with both signaler types.
Magnetic / Instrumented Pigs
Pigs fitted with permanent magnets or active CD42 electromagnetic transmitters are reliably detected by the CD52 Bandit.
Applications
Essential for pipeline operations requiring pig passage monitoring — from routine cleaning to subsea inspection campaigns.
Need Help Choosing?
Our sales team can help you select the right signaler — Sig-Tech, CD52 Bandit, or a combination — for your pipeline application.
Technical Literature
Download comprehensive documentation for both Pig Signaler product lines.
Sig-Tech Pig Signaler Brochure (EN)
English
Overview of the Sig-Tech intrusive signaler family
CD52 Bandit Non-Intrusive Pig Signaler Brochure (EN)
English
Overview of the CD52 Bandit family including variants and certifications
Sig-Tech IOM — TT-21-019 (EN)
English
Installation, Operation, and Maintenance manual
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