| A
compact, high frequency hydrophone with an operating depth
greater than 2500 m. Designed for continuous immersion in
isoparaffinic fluids and water. Low cost in high volumes.
The M4 hydrophone is a low
cost hydrophone when produced in high volumes. It is designed
for immersion in hydrocarbons, but will maintain its high
lead resistance after months of immersion in sea water.
It is 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
|
-204.6
± 1.5 dBV re 1 µPa @ 20 °C, 1 Hz
|
Capacitance
|
5.9
nF ± 15% nF @ 20 °C, 1 kHz
|
Charge
sensitivity
|
35
nC/bar ± 20% @ 20 °C, 1 kHz
|
| Mechanical
Characteristics
|
Size:
length, width, thickness
|
37
mm, 13.5 mm
|
Mass
|
8
grams |
Displacement
|
5
cc |
Operating
and Survival depth
|
>
2500 m |
Electrical
leads
|
28
AWG stranded |
Water
blocked leads
|
Yes
|
Storage
and operating temperatures
|
-50
to +70 °C |
| Stability
|
Variation
of Voltage Sensitivity
|
0.3
dBV decrease from 0 to 2500 m
|
Electrical
insulation between leads
|
>
1 GW at 20 °C and 70% humidity
|
Variation
of properties with time
|
Less
than 1% per year |
UV
and Isopar resistance
|
Excellent
|
|
