TesTex Inc., Logo

At TesTex, we know your turnaround depends on our turnaround.

Technology Application
LFET RFET BFET ECT Ultrasound OSET Support

TesTex uses a variety of state-of-the-art electromagnetic techniques to scan for defects in both ferrous and nonferrous materials and structures.


TesTex's Online store is now available.

LFET RFET BFET ECT Ultrasound OSET Support
Boiler Tubes AGS Tanks Pipelines Feedwater Heaters Heat Exchangers Finned Tubes Condensers Welds
Radio Field Electromagnetic Technique Triton RFET
Balance Field Electromagnetic Technique Triton BFET
Off Surface Electromagnetic Technique OSET - Scout
Ultrasonic Inspection Helix XT IRIS Echo 20/20

This is a great place to check out Technical papers, Case Studies, Videos and Testimonials related to our specialized non-destructive testing products and services.

☰ Menu

TX-4400 ECT Inspection System

Eddy Current - system

The TesTex TX-4400 ECT Inspection System is based on the Eddy Current Technique to quickly and accurately inspect non-ferrous metal tubing from the tube ID. It detects and sizes ID/OD pitting, baffle cutting, erosion, steam impingement, general wall losses, and other defects. Applications include:

  • Condensers
  • Feed Water Heaters
  • Coolers
  • Evaporators
  • Chillers

The TX-4400 offers eight standard channels with a multiple of mixing channels for better flaw sizing and detection and a 1KHz to 1.2MHz frequency range, and automated and Manual analysis done on-site.

It is fully digital and offers real-time mixing and a wide variety of special data filters and is compatible with bobbin, surface, and magnetic saturation probes.

Unwanted signals such as support plates can be suppressed, and the system can be used in conjunction with our TS-Map and AR-Wizard software; so, a final report can be delivered on-site.

TheTX-4400 can also be used for ferrous inspection to detect large flaws and small pitting and to distinguish between between ID and OD flaws. (Saturation can be adjusted to eliminate signal noise due to finned tubes, too.)

The system has differential and absolute responses for each frequency and a built in reference signal to generate an absolute signal without the use of a reference probe.

The TX-4400 electronics box is coupled with a laptop computer to operate the system through MS Windows-based software. All data is archived for analysis and processing as well as for comparison for future inspections. The data can be imported into the 3-D Tube Sheet Mapping Software for an overall visual of the equipment being tested.

Real-time mixing is available for suppression of support/baffle plates. The system may view absolute and differential modes at the same time.

The electronic boards are designed for independent operation to permit easier troubleshooting, repair, and expansion. Each of the main circuit boards is designed to act as a nearly complete single frequency system. More frequencies can be added to a system by inserting additional circuit boards to the backplane board.

Depending upon the configuration, the TX-4400 offers either high-speed inspection, which provide maximum speeds of five feet per second (1.52m/sec) or ultra-high speed insertion, which has a maximum speed of 20 ft/sec. and probes may be driven manually or with one of two optional probe drivers: the PD 6k or the PDP 22.

Both connect directly to the TX-4400 and use the same software, and are durable and reliable.


Eddy Current - PD6k

As its name implies, the PD 6k is a six kilogram (6 kg or 13.2 pound) probe driver.

It is extremely portable and lightweight.

It permits high-speed probe insertion, adapts to different air fittings, and needs only (regular) plant air to operate.

With the PD 6k, it is possible to inspect up to eight tubes per minute and 2,000 – 3,000 tubes per team per 12 hour shift.

The PD 6k can be used with ferrous or non-ferrous metal.

PDP 22

Eddy Current - PDP 22

The PDP 22 fits in 16” (406mm) manways, and permits retrieval and inspection at constant speed. Maximum insertion speeds are 20 ft/sec (6.10m/sec), and maximum inspection speeds are 10 feet/sec (3.05m/sec).

It is “over-designed” to ensure a long operating life, and its modular components are easy to maintain and repair. It allows 110/220V operation.

With its automated analysis, it can inspect up to twelve (12) tubes per minute, and 4,000 – 5,000 tubes per team per 12-hour shift.

Waveform & Mapping

ECT waveform
ECT Tube sheet map

Mag Wave ET

To inspect ferrous tubes, TesTex developed the Mag Wave ET technique, which uses special probes with the TX-4400. A wide variety of probes, which operate at frequencies of 1KHz to 500KHz are available, and they can automatically inserted with the PD 6k. As with our ECT probes, automated analysis is available.

With strict quality assurance procedures, all probes and accessories manufactured by TesTex are of the highest quality; so, we are able to provide probes with both excellent response signals and very low noise levels.


Copyright ©2020 TesTex Incorporated