Drawing Number: 21067
Revision: A
PIEZOELECTRIC CHARGE MODE PRESSURE SENSOR GENERAL OPERATION MANUAL
2
2.2
Series 112A High Sensitivity
Miniature Sensor
The Series 112A High Sensitivity Miniature Sensor is a
high-precision charge mode pressure sensor designed for
higher charge sensitivities necessary when measuring
compression,
combustion,
explosion,
pulsation,
actuation, cavitation, fluid, blast, turbulence and sound
pressures. The series consists of the Models 112A,
112A02, and 112A03 (along with special versions), with
pressure ranges of 3 000, 100, and 10 000 psi (20684,
689, and 68947 kPa), respectively. See Figure 2.1.
This quartz sensor measures near-static and dynamic
pressures from full vacuum to 3 000 psi (15 000 psi
optional). It measures transient or repetitive phenomena,
relative to the initial or average pressure level, over wide
amplitude and frequency ranges and under the most
adverse environmental conditions. System voltage
sensitivities range from 0.01 mV/psi to 1.0 volt/psi,
depending on the charge amplifier involved.
The Series 112A High Sensitivity Sensor contains a
rigid multi-plate sensing element with an integral
compensating accelerometer to minimize vibration
sensitivity. It is housed in all-welded stainless steel.
2.3
Models 112A04 and 112A05 High
Temperature Miniature Sensor
The
Model
112A04/112A05
High
Temperature
Miniature Sensor is a high-precision, charge mode
pressure sensor designed specifically for use in
compressors,
engines,
turbines,
heat
exchanger
combustion chambers and bombs, at moderate and high
temperatures. The Models 112A04 and 112A05 operate
to a maximum temperature of 600°F ( 315°C). See
Figure 2.1.
The all-welded, hermetic stainless steel construction of
this sensor ensures reliable operation in high-
temperature environments. It is constructed with a rigid,
multi-plate sensing element and integral compensating
accelerometer to minimize vibration sensitivity.
2.4
Series 113A High Frequency
Miniature Sensor
The Series 113A High Frequency Miniature Sensor is a
charge mode pressure sensor designed to measure shock
wave, blast, explosion, ultrasonic and dynamic
combustion pressures requiring ultra-fast response times.
The Series 113A consists of the Models 113A, 113A02,
and 113A03, having pressure ranges of 3 000, 100, and
15 000 psi (20684, 689, and 103420 kPa), respectively.
All are acceleration compensated. See Figure 2.1.
This sensor measures transient or repetitive phenomena
relative to the initial or average pressure level, over wide
amplitude and frequency ranges and under the most
adverse environmental conditions.
This stainless steel instrument contains an extremely
rigid compression-mode quartz element with an integral
compensating
accelerometer
to
reduce
vibration
sensitivity and partially suppress internal resonance
effects. This results in an accurate, dynamic high-
frequency response from the sensor.
2.5
Series 116 High Sensitivity Sensor
The Series 116 High Sensitivity Sensor is a special-
purpose high temperature charge mode pressure sensor
designed specifically to measure low-level pressures in
severe environments. The unit is most frequently used
in
engines,
hydraulic
and
pneumatic
devices,
compressors and turbines. Ideal for sound pressure
measurements,
microphones
and
small
pressure
agitations, its maximum dynamic pressure range is 100
psi (689 kPa). It is acceleration compensated to
minimize vibration sensitivity and is capable of a five-
microsecond rise time. See Figure 2.2.
This sensor measures transient or repetitive phenomena
relative to the initial or average pressure level, over a
wide amplitude range and a usable frequency range near
DC to between 20 000 and 30 000 Hz; the resonant
frequency is 60 000 Hz, except for the Model 116A,
which has a resonant frequency of 130 kHz. The Model
116 is extremely sensitive, with a nominal pressure
response of 10 pC/psi. The operating temperature for the
Series 116A ranges from -400°F to 400°F (-240°C to
204°C). The operating temperature for the Series 116B
and 116C ranges from -400°F to 650°F (-240°C to
343°C).
