Endevco® Model 7265A Series Low Mass Piezoresistive Shock Accelerometers0 pages

Model 7265A/A-HS
Piezoresistive accelerometer
Features

Description

• Small size
• 20 and 100 g full scale
• Damped
• DC response
• Motion studies

The Endevco® model 7265A series, with sensitivity up to 25
mV/g, is a family of very low mass (6 gram), piezoresistive
accelerometers designed for flutter testing, biomedical motion
studies, and similar applications requiring high sensitivity, good
low frequency response and minimum mass loading.
The model 7265A series has viscous damping to extend the
useful high frequency range and to reduce the effects of
spurious high frequency excitation. Mechanical stops prevent
damage when the transducer is subjected to overrange shock.
The model 7265A series utilizes two of Endevco’s PIEZITE® P-11
silicon gages and two fixed resistors in a full-bridge circuit. This
configuration provides a low impedance output of 500 mV full
scale with 10 Vdc excitation.
The model 7265A has a sensitivity of 5 mV/g and a full scale
of 100 g. The model 7265A-HS (high sensitivity) has a very
high sensitivity of 25 mV/g with a full scale of 20 g. Endevco
model 136 three-channel system, model 4430A or OASIS 2000
computer-controlled system are recommended as signal
conditioner and power supply.
CENTER OF
SEISMIC
MASS

.470
(11.94)

32 (813)
30 (762)

.140
(3.56)

1.25
(31.8)
TYPICAL

.305
(7.75)
.152
(3.86)

.220
(5.59)

.060
(1.52)

.25
(6.4)
.290
(7.37)

.630
(16.00)

CASE

HOUSING

.485 (12.32)
.475 (12.07)

.100 (2.54)
.095 (2.41)

FULL R 2PL
"A"

.105 (2.67) DIA CABLE
4 COND #32 AWG S.P.C.,
TEFLON INS, BRAIDED
S.P.C., SHIELD, SILICONE
RUBBER OUTER JACKET

ACCELERATION IN THIS
DIRECTION CAUSES
POSITIVE OUTPUT.
HOUSING
CASE

MODEL#

CABLE SHIELD

500 OHMS +/- 1%

TABULATION
DIM. "A"

7264A-HS

.30 (7.6)

7265A

.25 (6.4)

.250 DIA
(6.35)

RED +EXC
GRN +OUT

500 OHMS +/- 1%

BLK -EXC
WHT -OUT

SCHEMATIC
STANDARD TOLERANCE
INCHES
(MILLIMETERS)
.XX = +/- .03 (.X = +/- .8)
.XXX = +/- .010 (.XX = +/- .25)

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