Delay Line Transducers

Thickness and Flaw Inspection Solutions

A replaceable delay line transducer is a single element contact transducer designed specifically for use with a replaceable delay line.

Advantages:

Heavily damped transducer combined with the use of a delay line provides excellent near surface resolution
Higher transducer frequency improves resolution
Improves the ability to measure thin materials or find small flaws while using the direct contact method
Contouring available to fit curved parts

Applications:

Precision thickness gaging
Straight beam flaw detection
Inspection of parts with limited contact areas
Replaceable Delay Line Transducers
Each transducer comes with a standard delay line and retaining ring
High temperature and dry couple delay lines are available
Requires couplant between transducer and delay line tip

Delay Line Transducers

Frequency

Element Size

Colspan=2

Transducer
Part Numbers

MHz

inches

2.25

0.25

V204-RM

5.0

0.50
0.25

13
6

V206-RM
V201-RM

0.25
0.125

6
3

V202-RM
V203-RM

0.25

V205-RM

0.125

V208-RM

Replaceable Delay Line Options

Nominal Element		Standard Delay Line	High Temperature			Dry Couple Delay Line	Spare Retaining Ring	Spring Loaded Holders
Nominal Element		Standard Delay Line	350°F Max (175°C)	500°F Max (260°C)	900°F Max (480°C)	Dry Couple Delay Line	Spare Retaining Ring	Spring Loaded Holders
inches	mm
0.50	13	DLH-2	DLHT-201	DLHT-2	DLHT-2G	DLS-2	DRR-2	2130
0.25	6	DLH-1	DLHT-101	DLHT-1	DLHT-1G	DLS-1	DRR-1	2127 & DRR-1H
0.125	3	DLH-3	DLHT-301	DLHT-3	DLHT-3G	DLS-3	DRR-3	2133 & DRR-3H

Sonopen

Sonopen^® Replaceable Delay Line Transducer

Focused replaceable delay line
Extremely small tip diameter may improve performance on curved surfaces and small indentations
Handle for easier positioning of transducer head

Frequency	Nominal Element Size		Transducer Part Numbers
MHz	inches	mm	Straight Handle	Right Angle Handle	45° Handle
15	0.125	3	V260-SM	V260-RM	V260-45

Sonopen Replaceable Delay Lines
Tip diameter		Part Number
inches	mm
0.080	2.0	DLP-3
0.060	1.5	DLP-302
0.080	2.0	DLP-301*

Spring Loaded Holder

SLH-V260-SM*

Harisonic Pencil

Harisonic Pencil Transducers

These high frequency, focused delay line transducers are compatible with any ultrasonic instrument capable of displaying a return echo at depths as low as .010 inches in steel. The typical range is approximately from .010 inches to 0.250 inches in steel. The 0.060 inches circular contact face enables readings to be taken on curved surfaces. Typical applications for these transducers include the inspection of turbine blades, small diameter tubing and concave areas in small parts. Both transducers utilize replaceable delay tips. For best performance, a short cable (such as MB type, 6') should be used. These models, indicated by a part number ending with an "L", incorporate PowerLink™ Technology to assure optimal performance when used with a Sonic ultrasonic instrument.

The HC-876 ultrasonic transducer operates at high frequency (20 MHz) with a broad bandwidth and small contact surface. Its chief application is thickness measuring of critical components such as jet engine blades. It is fitted with a Microdot connector.

Replaceable Delay Line
Frequency	Nominal Element Size		Part Number
(MHz)	in.	mm	Straight Handle	Right Angle Handle
10	0.125	3	HC-398-RDL-L	HC-398-RA-RDL-L
Replacement Tips (10 ms)			HAX-398	HAX-398

HC-398-RDL-L Straight Handle

HC-398-RA-RDL-L Right Angle Handle

Permanent Delay Line
Frequency	Nominal Element Size		Part Number
(MHz)	in .	mm	Straight Handle	Right Angle Handle
20	0.125	3	HC-876-L	HC-876*
				HC-876-RA-L
Permanent Tip Delay (10 ms) *Not PowerLink compatible.