Our products measure the thickness of concrete plates
and slabs according to ASTM Standard C 1383-98a.
They can also measure the depth of surface-opening
cracks and determine the location, depth and extent
of cracks, voids, delaminations, honeycombing and
debonding in plain and reinforced structures. For a
description of the method, see our
The picture and numbered list below describe components
available for an impact-echo instrument. Configuring an
instrument consists of selecting the number and types of
transducers (items 2-4). These are described on the next
page, together with suggested instrument configurations.
Signal Processor: Receives, filters and digitizes
signals from the transducers and sends signal data to the tablet computer.
Pistol Transducer: Self-standing transducer detects
signals generated by multiple reflections of stress waves in structures.
transducer detects signals generated by multiple reflections of stress waves
WaveSpeed Transducer: Dual head
transducer used to measure wave speed by recording the travel time of a
stress wave between two transducer tips according to ASTM Standard C
Windows 10 Touch tablet computer
Quick Start Guide and Instructions
Evaluation of Concrete and Masonry" by M.J. Sansalone and Willima B. Streett
(24 Chapters, 339 pgs)
8. Impactors: A set of 10
hardened steel spheres on spring rods used to generate stress waves in
Impact-Echo Software: Provided on USB thumbdrive and CD-ROM disk
of BNC cables
The cylindrical transducer (below left) and the pistol-grip transducer
(center) are used for impact-echo testing. The cylindrical model is useful for
testing in narrow and confined spaces; the pistol-grip model is easier to use
and is well suited for flat surfaces. A test instrument must have at least one
of these transducers. The Wavespeed unit (dual-head) on the right is used only
for independent measurements of wave speed. Such a test is required for
determining plate or slab thickness in accordance with ASTM Standard C 1381-98a.
Wave speed can be measured using a single cylindrical or pistol-grip transducer
if tests can be performed on a slab of precisely known thickness in a region of
the structure where testing will be done.
Products and Options
The following are six recommended configurations for an
impact-echo test system depending upon the types of tests to
System A :
system having three transducers including two cylindrical or
two pistol grip or one of each, plus a dual-head transducer.
The cylindrical and pistol grip transducers can be used for
testing, with a backup available in case one is lost or
damaged. Determining the depth of surface-opening cracks
requires two transducers, and
is most convenient using two cylindrical or two pistol grip
transducers, or one of each. The dual-head transducer is
used for independent measurements of wave speed.
The picture at the
top of this page shows the components of this system (tablet
A system that
includes the pistol transducer for testing and the dual-head
transducer for wave speed measurements.
This will cover all possible testing needs.
For determining the depth of surface opening cracks,
one end of the dual head transducer can be used in
conjunction with the pistol transducer.
The dual head transducer is used for independent
measurements of wave speed.
System C: A system that includes
only one transducer, either cylindrical or pistol grip.
This system is suitable for routine testing where
wave speed is estimated or measured.
Wave speed can be measured only if tests can be
performed on slabs of known thickness in the regions where
testing is to be performed.
below show testing with a pistol transducer (left) and
independent measurements of wave speed (right).
Mobile Basic System:
perfect system for those working alone in the field. This
system includes all of the components of the System C
(above) with the addition of a chest-mounted touch tablet
(Microsoft Surface) running our Impact-Echo software on
Windows 10. The tablet is located in the zippered drop-down
front of the case, and has adjustable side straps to keep it
at a comfortable working angle. The signal processor is
carried in a holster and the transducer attaches to a D-ring
on the vest when not in use.
Our specialized system
is designed for 2-man forensic teams working in
difficult field environments as illustrated below. One
operator uses the testing device (transducer) on the
structure being tested, and the signals are
instantaneously sent by wireless transmission to the
computer, where the second operator sees the resulting
signals on the touch tablet screen and can make
immediate analyses and decisions about where to next
test. The wireless system is effective for distances up
to 300 meters between operators, and it includes two
"fireman's radios" for continuous communication between
operators during testing. In the figure below the
testing operator is carrying the signal processor in a
backpack which is included with the system.
Instruments introduces an integrated Teaching System to
be utilized by universities and technical institutes for
teaching the fundamental theory of impact-echo while
giving students a hands-on laboratory experience. The
Teaching System consists of a pistol-type transducer,
signal processor, impactor set, Windows 10 software and
12 textbooks written by the leading authorities in the
development and application of the art. The book
contains 24 chapters which cover a wide array of
impact-echo applications. (See description of the book
here which was written by the
founders of Impact-Echo Instruments.)
Impact-E Software: All systems include
a self-teaching course, the textbook and the Impact-E
Windows-based software. Most engineers explain that they
become proficient with the software in 4 to 5 hours
after working with the self-teaching materials. The
software has been recently augmented to provide 3D
mapping of composite structures that helps to visualize
the relative locations of flaws.
Ruggedized Field Case: All of our systems
(except teaching system) include a ruggedized, field
case that is dustproof, waterproof and dent proof. The
wheeled case has a collapsing handle and individualized
component compartment as shown below
ASTM Standard C 1383-98a
The instrument in the configurations shown above can measure
P-wave speed and concrete thickness according to Standard C 1383-98a,
"Standard Test Method for Measuring the P-Wave Speed and
the Thickness of Concrete Plates Using the Impact-Echo
Method", published by the AMERICAN SOCIETY FOR TESTING
AND MATERIALS (ASTM).
Specifications & Warranty:
Click here to view warranty
and compliance provisions.