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Strain Sensors
Operational
Series DT3625
Input Resistance

1000 ohms, �2%
Sensitivity
(�1%); 1.025 mV/V/1000�
Rated Excitation Voltage
10.0 VDC
Linearity
�0.5% Max.
Zero Offset
�0.5 mV/V Typical
Operating Range
-3500 to +5000 �
Output Resistance
1000 Ohms, �2%
Sensitivity Shift
�0.005% / �F
Hysteresis, Repeatability
�0.013% Max.
Zero Shift
�0.00025 mV / V / �F Typical
Creep
<0.5%, 5 Min. @5000 �
Environmental
2


Temperature Range
-54� to +125�C
Vibration
30g, 10Hz to 2KHz
Humidity
MIL-STD-202 Method 103B
Salt Spray
MIL-STD-202, Method 101D (168 Hours)
Insulation Resistance
100 Meg. min. @ 500VDC
Dielectric Strength
1050 VRMS, 60Hz, 1 Min.
Altitude
Sea Level to 70,000 Ft.
Shock
100g, 11msec.
Flammability
MIL-Std-202 Method 111A
Fluids
Resistant to short term exposure to fuel,
lubricating oils and hydraulic fluids.
Physical

Size
0.45 x 0.25 x0.14 thick
Encapsulant
Silicone rubber per MIL-S-23586A Type 1 Class 2, Grade A
Weight
13 grams
Matrix
0.001 Polyimide
Leads
#26 AWG, Teflon ins, SPC, 12 Min.
1
at +25 Deg. C
2
Installed Gage


Fig. 1 Typical Installation of Old Style Strain Gages
1.
Bolt or rivet removed from assembly
2.
Dummy gage(s) bonded to Z Tab of same
material as structure.
3.
Active gage bonded to structure under test.
4.
Z Tab mounted to structure with bond or rivet.
5.
Strain gage leads interwired and soldered to
junction block.
6.
Entire unit covered with protective material.
Model
Compensating Material Lead Length
DT3625-1 Aluminum
7075-T6 48
Inches
DT3625-2 Steel,
AISI
4130 48
Inches
DT3625-3 Titanium TI-6AL-4V Annealed 48
Inches
DT3625-4 Graphite Epoxy AS4/3501-6
48 Inches
DT3625-5 Steel,
Aermet
100 48
Inches
ADVANTAGES Higher level accuracy
Twice the output

Less installation time No loss of structural integrity

Optimum temperature compensation
Columbia Research Laboratories, Inc.
1925 Mac Dade Blvd. Woodlyn, PA

19094 USA
Phone: 1.800.813.8471 / Fax: 610.872.3882 / email: sales@columbiaresearchlab.com
Ordering Information:
















Specifications
1

































Strain Sensors
Series DT3625
Columbias Strain Sensors measure fatigue loading experienced by aircraft under various
conditions of speed, weight and mission configuration more accurately than by older, less
accurate counting accelerometer methods. These sensors allow critical undercarriage
structures and surfaces to be more accurately monitored for potential fatigue damage
induced by thousands of flight hours, high stress maneuvers and landings. The simplicity
and reliability of these sensors also makes them suitable for routine use in the laboratory.
Series DT3625 sensors were developed in response to the need for fatigue measurements
in tight spaces, and these sensors offer all the accuracy, ruggedness and ease of
installation of the flight-qualified Series DTD2684 sensors. Models are available to
compensate materials commonly used in aircraft structural fabrication. Columbia Model
5802 Strain Gage Amplifier is designed to amplify the sensor signals providing both
strain and temperature outputs.
Note: Exports from the United States are subject to the licensing requirements of
the Export Administration Regulations (EAR) and/or the International Traffic in
Arms Regulations (ITAR).
Smallest Size
Self Temperature
Compensating
Ease of Installation
High Output Two Active
Arms
Fig. 2 Installation of Columbia Strain Sensor
1.
Strain Sensor bonded to surface under
test.
2.
Leads connected to wire harness.
3.
Coat sensor and wires with waterproofing
material.