Description

Choosing the correct transducer is critical to matching your specific material type, thickness range, geometry, and surface temperature.

Detailed Probe Profiles & Technical Data

N05 / N05/90° — The Standard Utility Probe

  • Description: The default workhorse dual-element transducer supplied with most MT-series units. Balanced sensitivity and penetration for general engineering inspections.
  • Best Used For: Structural steel, raw plates, large-diameter tanks, and machined components.
  • Limitations: Avoid using on active steam lines or pipe walls thinner than 1.2 mm.

N07 — The Micro-Bore & Thin-Wall Probe

  • Description: High-frequency, small-footprint transducer designed to focus acoustic energy into thin boundaries.
  • Best Used For: Small-diameter tubing, curved elbows, hydraulic lines, and copper heat exchangers.
  • Technical Tip: Requires extra couplant and steady, vertical pressure due to the reduced surface contact area.

HT5 — High-Temperature Transducer

  • Description: Engineered with specialised thermal-insulating delay lines and heavy-duty casing to withstand extreme heat cycles.
  • Best Used For: In-service oil and gas pipelines, refinery vessels, and steam pipe monitoring.
  • Crucial Operation Rule:

Note on High-Temp Testing: Limit physical probe contact to under 5 seconds when measuring surfaces up to 300°C. Allow the probe to air-cool for at least 15 seconds between measurements to avoid internal crystal damage. Use specialised high-temperature silicone couplant.

N02 — Thick & High-Attenuation Probe

  • Description: Low-frequency design with massive penetration capabilities. Low frequencies suffer less scattering in coarse, non-homogeneous structures.
  • Best Used For: Grey cast iron, ductile iron, fibreglass, composite structures, and heavy rubber linings.

P5EE — Echo-to-Echo Thru-Paint Transducer

  • Description: Developed strictly for gauges featuring Echo-to-Echo firmware. It filters out the thickness of protective surface coatings (paints, epoxies) to read only the underlying metal substrate.
  • Best Used For: Painted storage tanks, coated structural columns, and marine hulls.
  • Note: Not compatible with base MT150 / MT160 units. Requires MT180 or MT190.

Quick-Reference Probe Compatibility & Specification

Probe Model Frequency Contact Diameter Measurement Range (Steel) Temperature Range Primary Application Compatible MT Gauges
N05 5.0 MHz 10 mm 1.2 mm to 230.0 mm -10°C to 60°C Standard/General-purpose flat surfaces MT150, MT160, MT180, MT190, MT200, MT600, MT660
N05 / 90°N05/90° Thickness Probe 5.0 MHz 10 mm 1.2 mm to 230.0 mm -10°C to 60°C Right-angle cable exit for tight physical spaces MT150, MT160, MT180, MT190, MT200, MT600, MT660
N07 7.0 MHz 6 mm 0.75 mm to 80.0 mm -10°C to 60°C Thin-walled tubes, small diameters, tight curves MT150, MT160, MT180, MT190, MT200, MT600, MT660
HT5 5.0 MHz 12 mm 3.0 mm to 200.0 mm Up to 300°C High-temperature pipes, active process vessels MT150, MT160, MT180, MT190, MT200, MT600, MT660
N02 2.5 MHz 14 mm 3.0 mm to 300.0 mm -10°C to 60°C Attenuative, coarse-grained, or cast materials MT150, MT160, MT180, MT190, MT200, MT600, MT660
P5EE 5.0 MHz 10 mm 3.0 mm to 150.0 mm (EE)
2.0 mm to 600.0 mm (PE)		 -10°C to 60°C Echo-to-Echo (EE): Thru-paint & coatings MT180, MT190, MT600, MT660

Please confirm the meter the probes will be used with to ensure the correct probes are supplied.