Delay line ultrasonic transducer

direct-contacthigh-frequencywith delay line

Product Overview
The delay line contact transducer series provides contact ultrasonic inspection capability for thickness measurement and near-surface flaw detection. Designed as front-end probes for compatible ultrasonic flaw detectors and thickness gauges, these transducers use a physical delay line to separate the active element from the inspection surface and enable reliable inspection of thin or curved components.

Key Features

• Delay line contact configuration for contact ultrasonic NDT.
• Suitable for thickness measurement and near-surface flaw detection.
• Exchangeable and removable delay line options across model families.
• High-frequency variants (up to 22 MHz) for improved resolution and small-flaw detectability.
• Side-mounted Microdot connector on delay line models; BNC and LEMO-1 cable options available depending on model.
• DFR models offer removable delay lines; Mini-DFR for compact, small-element tasks.
• K-PEN pencil probes available with straight, 45° and right-angle handles; two tip delay options (0.065 in. / 1.7 mm and 0.090 in. / 2.3 mm).

Applications
Recommended for ultrasonic thickness measurement and near-surface flaw inspection of thin sections, curved parts, tubing, pipe, composite structures, plastics and turbine blades. The K-PEN pencil probe is optimised for tight radii (e.g., turbine blades) and for thickness checks at the base of external pits where access is restricted.

Product Structure

• Delay line structure: A delay line positions the active element away from the inspection surface to improve near-surface response.
• Exchangeable delay line: G..MN configurations accept exchangeable delay lines (9.5 mm and 12.5 mm options).
• Removable delay line: DFR configurations provide removable delay lines on selected element sizes.
• Mini-DFR: Compact removable delay line configuration for small-element inspections.
• K-PEN pencil probe: Replaceable delay line pencil probe with two tip diameters and three handle styles for access-limited inspections.

Specifications

• Product Type: Delay line contact transducer
• Inspection Method: Contact ultrasonic inspection
• Application Category: NDT and thickness measurement
• Main Applications: Thickness measurement, near-surface flaw detection; suitable for thin sections, curved parts, tubing, pipe, composites, plastics, turbine blades
• Model Families: G..MN, DFR, Mini-DFR, K-PEN
• Frequency Options: 2.25, 3.5, 5, 7.5, 10, 15, 20, 22 MHz (model dependent)
• Element Diameters: 3 mm, 5 mm, 6 mm, 13 mm (model dependent)
• Delay Line Options: 9.5 mm, 12.5 mm, 0.38 in., 0.5 in. (model dependent)
• K-PEN Tip Delays: 0.065 in. / 1.7 mm; 0.090 in. / 2.3 mm
• K-PEN Handles: Straight, 45°, right angle
• Connector / Cable Options: Microdot, BNC, LEMO-1 (model dependent)
• Accessories: Delay line, cable, delay line couplant, spring-loaded VEE block, BNC cable (model dependent)
• Custom Configuration: Available on request

Model Options

• G..MN — Frequencies: 5, 10, 15 MHz — Element: 5 mm — Exchangeable delay line options
• DFR — Frequencies: 2.25, 3.5, 5.0, 10.0, 15.0, 22.0 MHz — Elements: 3 mm, 6 mm, 13 mm (depending on model) — Removable delay line configuration
• Mini-DFR — Frequency: 20.0 MHz — Element: 3 mm — Compact removable delay line
• K-PEN — Frequencies: 7.5, 20.0 MHz — Tip delays: 0.065 in. / 1.7 mm and 0.090 in. / 2.3 mm — Handles: Straight, 45°, right angle

Integration Notes
Select the appropriate model based on measurement task, material, section thickness, surface geometry, access constraints, required frequency and element size. These transducers require compatible ultrasonic inspection equipment and proper contact coupling; custom configurations are available on request.