| An
electrical equivalent of the T2®. Designed for long
term immersion in isoparaffinic fluids and water without
degradation.
The M2 hydrophone is an
electrical equivalent of the T2® hydrophone. The M2’s
output is stable with depth, temperature and time, whether
it is immersed in isoparaffinic fluids or water. The M2
can be manufactured with a depth switch that satisfies export
restrictions.
The M2 is also available
in a package that couples acoustic pressure to the hydrophone,
but decouples it from mechanical forces, making it ideal
for use in solid-core or gel-filled streamers.
| Electrical
Characteristics
|
Voltage
Sensitivity
|
-194.0
±1.5 dBV re 1 mPa @ 20 °C (20 /bar)
|
Capacitance
|
16.0
nF ± 2 nF @ 20 °C, 10 m depth, 1 kHz
|
Charge
sensitivity
|
-169.9
± 2.4 dB re 1 nC/mPa @ 20 °C (320 nC/bar)
|
Mechanical
Characteristics
|
Size:
length, width, thickness
|
33
mm, 28 mm, 10 mm
|
Mass
|
15
grams |
Displacement
|
9
cc |
Operating
depth
|
100
m |
Survival
depth
|
>
400 m: no permanent change in Qsen, or Capacitance |
Electrical
leads
|
28
AWG stranded |
Water
blocked leads
|
Yes
|
Storage
and operating temperatures
|
-40
to +80 °C |
Acceleration
sensitivity
|
<
1.0 mbar/g, in air, any axis |
Lowest
resonance frequency
|
8
kHz |
Labeling
|
Calibration
parameters, serial number, date |
| Stability
|
Variation
of Voltage Sensitivity
|
<
0.3 dBV 1Hz to 2 kHz
|
Electrical
insulation between leads
|
>
1 GW at 20 °C and 70% humidity
|
Variation
in Capacitance
|
2.5%
decrease from 0 to 55 m depth
0.4% increase per °C |
Variation
in Voltage Sensitivity
|
0.15
dB decrease from 0 to 55 m depth
0.2% increase per °C |
Variation
of properties with time
|
Less
than 1% per year
|
UV
and Isopar resistance
|
Excellent
|
|
