MsS System

The MsS System is a device that electromagnetically generates and receives ultrasonic waves in the material for long-range guided wave testing. It is composed of a laptop computer, the MsSR3030R instrument, and MsS probes as shown in a photo below. The MsS software in the laptop computer controls parameters of the MsSR3030R, acquires data through a USB port, analyzes data, and generates inspection report.
The MsSR3030R instrument generates tone-burst electric pulses to the MsS probes and detects induced voltage generated when the ultrasonic guided wave passes through the probe.
 The MsS probe is an ultrasonic transducer consisting of ferromagnetic strips (0.10 mm thick) and ribbon cables (less than 4 mm thick) as shown in the photo. The ultrasonic wave is generated in the thin strip and coupled to the pipe through dry coupling, shear couplant, or epoxy bonding.
MsS system



 MsS Sector Probe

The MsS sector probe is 4– to 12-inch-long, covering only a section of pipe circumference, and is used for medium range (5 to 20 ft) high-resolution inspection. It is used for inspecting pipe support or pipe shoe area, wall penetration pipe, and soil-air or concrete-air interface of pipe. Because the sector probe covers only section of pipe, its sensitivity is very high, not depending on the pipe size.

 General system characteristics

The guided wave system using MsS probe has much merit compared to those using discrete piezoelectric transducer belts. The following is the list to check before purchasing guided wave system. The data in the parentheses are specifications of MsS system.

1. Operating frequency  [5 kHz to 250 kHz]

2. Price of the system is reasonable compared to other guided wave systems.

3. Additional maintenance cost is very low compared to other guided wave systems.

4. Defect detection sensitivity [Sensitivity is very high with sector probe and high-frequency operation]

5. Sum of dead zone length and near field length [It is  4 inch with 128 kHz]

6. Inspection range [about 500 ft along one direction for aboveground painted pipeline for finding 2 or 3 percent cross-sectional area defect]

7. Weight of equipment [about 12.5 kg]

8. Weight of probe [0.8 kg for 24-inch pipe probe; we don’t use crane to lift the guided wave probe]

9. High signal-to-noise ratio [Less flexural mode generation than any other guided wave systems]

10. Broad band operation [We can test 5 to 250 kHz with one strip installation]

11. High spatial resolution by using high frequency and low number of cycles [We use 1 or 2 cycles for GWT]

12. Finding defect around  the pipe circumference [we use sector probe]

13. Inspection locations per day [We can usually inspect 5 to 30 locations per day depending on pipe size and accessibility]

14. Signal repeatability [MsS system generates high-repeatable data for guided wave monitoring with 360-degree covering probe.]

15.  High temperature application [MsS probe can inspect up to 500 C using mechanical coupling tool]

16. Size of probe [MsS probe is very thin and thus can be installed on the pipe having about 0.4-inch gap between pipes.]

17.  Training [The MsS technique is trained by Level III in GWT who is also ASNT NDT Level III in UT and ET and has more than 13 years experience in GWT with 13 US patents about guided wave application]

18.  Continuous support and responsibility [We support clients with continuous training]

19.  Honesty [We are honest to client. We support client based on our experience of inspection service, research, development, training, data analysis service, guided wave software development, and consulting.]

20. Other application area [MsS system can be used for plate, buried rod, cable, boiler tube, condenser tube, heat exchanger tube, tube angle, and angle beam.