HTI BOREHOLE SERIES HYDROPHONES
Specifications are available for these models:
HTI-99-DHLA SERIES -
MECHANICAL DESIGN
Ceramic elements are at the center, shock mounted to the tubular strength
member which is directly connected to the head and tail electromechanical
connectors.
Surrounding the strength member is a rubber boot which is oil filled and
sealed from the environment.
The compliant rubber boot allows for expansion of oil.
Around the rubber boot is a small oil reservoir contained by a rigid stainless
steel tube. This tube is fastened and sealed at each end of the hydrophone
unit. Pressure is compensated via a unique integral compensating system.
IMPROVEMENTS
- Increased compressive and tensile strength
- Increased operating temperature
- Double boot seal - stainless steel outer boot with inner rubber boot;
outer boot may be removed or compromised while inner seal remains functional
- Maximum number of channels increased from 6 to 8
- Increased ease of field repairs for all components, reducing downtime
- Standardized English and Metric models
SPECIFICATIONS
SENSITIVITY:
Element- -183 dB re: 1V/µPa
- 70 V/Bar
Optional preamplifier gain - 0 dB to 48 dB
FREQUENCY RESPONSE: Customer specified - low cut in preamplifier: 1 Hz to 5 KHz
EQUIVALENT INPUT SELF NOISE (with preamp):
RMS from 1 Hz to 1000 Hz
- 58 dB re: 1 µPa
- 0.008 µBar
Spectral
- 49 dB re: 1 µPa/sq.root Hz @ 10 Hz
- 30 dB re: 1 µPa/sq.root Hz @ 100 Hz
- 21 dB re: 1 µPa/sq.root Hz @ 1000 Hz
PREAMPLIFIER TYPE
- Two-wire transconductance type
- Power: 8 mA constant, 12 VDC to 30 VDC
CAPACITANCE: 1.6 Nf
MAXIMUM TEMPERATURE: 200 deg. C
MAXIMUM PRESSURE: 20,000 psi
TENSILE STRENGTH: 10,000 lb (4536 kg)
COMPRESSIVE STRENGTH: 10,000 lb (4536 kg)
SENSORS PER CHANNEL: 9
CHANNELS PER HYDROPHONE: 2
English version -
- length = 60 inches
- diameter = 1.7 inches
- sensor separation = 1.84 inches
Metric version -
- length = 2.0 m
- diameter = 4.32 cm
- sensor separation = 6.26 cm
HTI-97-DHLA SERIES -
SENSITIVITY:
Element- -181 dB re: 1V/µPa
- 90 V/Bar
Optional preamplifier gain - 0 dB to 48 dB
FREQUENCY RESPONSE: 1 Hz to 10 KHz
EQUIVALENT INPUT SELF NOISE (with preamp):
RMS from 1 Hz to 1000 Hz
- 58 dB re: 1 µPa
- 0.008 µBar
Spectral
- 49 dB re: 1 µPa/sq.root Hz @ 10 Hz
- 30 dB re: 1 µPa/sq.root Hz @ 100 Hz
- 21 dB re: 1 µPa/sq.root Hz @ 1000 Hz
MAXIMUM TEMPERATURE: 150 deg. C
MAXIMUM PRESSURE: 20,000 psi
NUMBER OF SENSORS: 24 (2 groups of 12)
SENSOR SEPARATION: 1.85 inches (4.7 cm)
SIZE: 60.0 inches (152.4 cm) length X 1.2 inches (3.1 cm) diameter
HTI-93-DH SERIES -
SENSITIVITY:
Element- -186 dB re: 1V/µPa
- 50 V/Bar
Optional preamplifier gain - 0 dB to 48 dB
FREQUENCY RESPONSE: 1 Hz to 15 KHz
EQUIVALENT INPUT SELF NOISE (with preamp):
RMS from 1 Hz to 1000 Hz:
- 63dB re: 1 µPa
- 0.015 µBar
Spectral:
- 54 dB re: 1 µPa/sq.root Hz @ 10 Hz
- 35 dB re: 1 µPa/sq.root Hz @ 100 Hz
- 26 dB re: 1 µPa/sq.root Hz @ 1000 Hz
MAXIMUM TEMPERATURE:- 200 deg. C (stainless)
- 150 deg. C (polyurethane)
MAXIMUM PRESSURE: 10,000 psi
Pressure compensated design
SIZE: 5.35 inches (13.6 cm) length X 1.6 (4.1 cm) inches diameter
HTI-94-SDH SERIES -
SENSITIVITY:
Element- -186 dB re: 1V/µPa
- 50 V/Bar
Optional preamplifier gain - 0 dB to 48 dB
FREQUENCY RESPONSE: 1 Hz to 15 KHz
EQUIVALENT INPUT SELF NOISE (with preamp):
RMS from 1 Hz to 1000 Hz
- 63 dB re: 1 µPa
- 0.015 µBar
Spectral
- 54 dB re: 1 µPa/sq.root Hz @ 10 Hz
- 35 dB re: 1 µPa/sq.root Hz @ 100 Hz
- 26 dB re: 1 µPa/sq.root Hz @ 1000 Hz
MAXIMUM TEMPERATURE: 200 deg. C (stainless)
MAXIMUM PRESSURE: 10,000 psi
SIZE: 4.5 inches (11.4 cm) length X 1.2 inches (3.1 cm) diameter
Last updated: 17 December, 1999.