Non-Contact Strain Measurement
Measurement Ranges to 15 in. (380 mm)
The LE Model
Laser Extensometers are precision, wide-range instruments specifically
designed for accurate, non-contact measurement of strain on various
materials under tensile or compressive conditions. They may also
be utilized for other applications where non-contact measurement
is desired. The LE models are completely self-contained and are
housed in a single compact enclosure. They take advantage of the
latest laser technology in order to achieve high performance with
LE Laser Extensometers provide: a digital display; 4 button keypad;
analog output; and an RS-232 computer interface; all of which
are located on the back panel. Instrument operation may be from
the back panel or remote via the RS232 interface.
instruments are designed to handle a wide range of measurement
applications, the Model LE Laser Extensometers are easy to operate.
They utilize a unique scanning laser beam technique to measure
dimension changes from one side of the subject, eliminating the
need for a scan receiver on the opposite side. For special applications
requiring transmission around or through a specimen or other object,
alternate methods can be implemented.
The LE Laser
Extensometers are normally operated with the beam in a vertical
plane but they can be operated in other planes as well. Target
materials are available for various measurement applications.
in. (8-80 mm)
± 0.0002 in. (±0.005 mm)
0.0001 in. (0.001 mm)
in. (8-127 mm)
± 0.0004 in. (±0.010 mm)
0.0001 in. (0.001 mm)
in. (8-380 mm)
± 0.002 in. (± 0.05 mm)
0.001 in. (0.01 mm)
in. (±0.001 mm)
13" x 7.1" x 4.5"
10 lb. (4.5 kg)
in. (±0.005 mm)
15" x 7.1" x 4.5"
13 lb. (6 kg)
in. (±0.05 mm)
27"D x 18"H x 7.7"W
48 lb. (22 kg)
Analog Output Ranges
line, 16 character/line, LCD Display with LED backlighting
In. or mm, selectable
16 bit, selectable range, ±10V full scale
0.1 , 0.2 , 0.5 , 1.0 , 2.0 , 5.0 ,10.0 , 20.0 inch full scale
2.0 , 5.0 , 10.0 , 20.0 , 50.0 , 100 , 100 , 500 mm full scale
in. nominal, 20 in. maximum, selectable
250 mm nominal, 500 mm maximum, selectable
moving window average is applied over a selectable number
of scans to digitally filter the output reading.
3-wire type, selectable Baud rate (9600, 4800, 2400, 1200)
Reading can be zeroed anywhere within the full scale range
of the instrument
670nm diode laser; <1mW maximum scanned output;
CDRH certified class II laser instrument
VAC ±10%, 50/60 Hz (standard), 230 VAC ±10%,
50/60 Hz (optional)
Four 1/4-20 mounting holes in base
optimum displacement range at calibrated target distance
Note: Specifications measured at 25 deg. C, 50% relative humidity.
These specifications are typical and subject to change without
Model LE-01 Laser Extensometer in gaging position for tensile
test on a specimen
- Glass-beaded retro-reflective
tape for service to 200 deg. F.
strip for service to
900 deg. F.
- For higher temperature
service consult the factory
Extensometers are Class II laser products. In normal usage they
are not considered hazardous due to the low power of scanned laser
beams. However, staring into the beam could cause damage to the
operator's eyes and it is the operators responsibility to follow
all safety precautions and safety labels.
PO Box 678 • Irwin, PA 15642
724-744-4636 • Fax: 724-744-4636
www.e-i-r.com • Email: firstname.lastname@example.org