From: Massion, Gene
Sent: Wednesday,
August 08, 2007 10:08 AM
To: Massion, Gene
Subject:
Emailing: High Tech, Inc. - Acoustic and Seismic Sensors and Systems.htm
HYDROPHONE PRODUCT GUIDE
General Description
The HTI series of hydrophones are
precision, low noise, deep water acoustic sensors. Over 3000 units have been
manufactured and deployed with excellent results in government and industry
applications. The hydrophone/preamplifier assembly consists of piezoelectric
ceramic cylinders which form the hydrohone active acoustic element. The
preamplifier is mounted inside the ceramic cylinder and interfaces the active
element to the signal conditioning electronics via an underwater connector. Each
model features an integral Faraday shield for EMI rejection and improved
crosstalk performance.
The ceramic cylinders are radially polarized DOD-STD-1376A Type I material.
With end caps, the enclosed cylinder forms a small pressure vessel which houses
the preamplifier assembly. This "air backed" design is capable of withstanding
pressures to 10,000 psi.
The preamplifier itself is a transconductance amplifier design which
eliminates the need for separate power and signal conductors. Preamplifier power
consumption is less than 150 mW based upon 24 VDC. The supply voltage range is
from 10 to 40 VDC. Conventional 3-wire voltage mode amplifiers are also
available.
Completed assemblies are encapsulated in polyurethane and pressure cycled to
operating depth prior to calibration.
REFTEK-17
High Tech, Inc. is the exclusive worldwide manufacturer of the
REFTEK-17 calibrated hydrophone pursuant to the license agreement with
Refraction Technology, Inc.
- Customer specified connectors
- Complete acoustic test & calibration
- Custom mounting configurations
- Calibration injection port
- Acceleration canceling configuration
- Dual sensitivity
- Low power (30 mW)
- 3-wire voltage mode amplifiers
Last updated: 10 May, 1999.