Optimizing a Low-cost Multi Sensor System for Hydrographic Depth Determination

Surveying devices with lower costs are being welcomed by hobbyists eager to determine water depth. The Department of Geodesy and Geomatics at HafenCity University (HCU) in Hamburg has been working on cost-efficient solutions in recent years. With shallow water surveys not required to be performed with the accuracy and precision of industrial projects, surveying devices with lower costs are being welcomed by hobbyists eager to determine water depth. With this low-cost demand rising, the investigative development of these products has become a scientific research issue. The Department of Geodesy and Geomatics at HafenCity University (HCU) in Hamburg has been working on cost-efficient solutions in recent years.  The Old Openseamap Project During a project with openseamap.org, a Multi Sensor System (MSS) including an Echo sounder, GPS and inertial measurement unit (IMU) was built up and tested. Despite... (read more)
2019-04-08 01:44:05

5th U.S. Navy Order For FSI’s DT-705/B CTD Sensor

Falmouth Scientific, Inc received its 5th quantity order for the U.S. Navy’s DT-705/B sensor. FSI developed and tested the unit under a Teaming Agreement with International Transducer Corporation (ITC) for use as time-of-flight sound velocity sensor on U.S. Navy submarines. The DT-705/B system uses a shock-hardened version of FSI’s patented non-external inductive conductivity sensor, which is commercially available as the FSI NXIC CTD. The U.S. Navy units are rated Class A naval equipment, capable of meeting the Critical Item Product Specification and environmental requirements. (read more)
2006-05-12 12:00:00

FSI Receives 4th Order for the U.S. Navy’s DT-705/B CTD Sensor

Falmouth Scientific, Inc. announced that it has received its 4th quantity order from International Transducer Corporation (ITC) located in Santa Barbara, CA for the U.S. Navy’s DT-705/B. FSI, under a Teaming Agreement with ITC, designed, developed and tested the new unit, which replaces the current time-of-flight sound velocity sensor used on U.S. Navy submarines. The DT-705/B system uses a shock-hardened version of FSI’s patented non-external inductive conductivity sensor, which is now commercially available as the FSI NXIC CTD. The U.S. Navy units are rated Class A naval equipment, capable of meeting the Critical Item Product Specification and environmental requirements. (read more)
2005-06-16 12:00:00

The Unknown Hydrophone and Transducer Supplier

Sensor Technology Ltd
Sensor Technology Ltd is a vertically integrated component manufacturer that produces piezoelectric ceramics and piezo-based acoustic transducers. Located in Collingwood, near Toronto, Canada, the company has grown steadily for nearly three decades. Perhaps not a widely recognised name, Sensor Technology Ltd provides piezoelectric ceramics, hydrophones and transducers to some of the largest companies in the oil & gas, defence and maritime industries.   < Niru Somayajula, President & CEO, Sensor Technology Ltd (Canada)   Sensor Technology Ltd (SensorTech) is a privately owned Canadian corporation started by a husband and wife team in 1983. The company's initial focus was piezoelectric ceramics and... (read more)
2010-09-13 02:57:14

Data Integration for Coastal Surveying

Combining Laser Scanner and Bathymetric Sensor
When surveying the coastline, the integration of bathymetric (below sea level) and laser scanning (above sea level) data causes problems due to the different imaging properties. However, by ensuring that the different data sets have been accurately georeferenced and oriented, a complete and accurate model of the terrain above and below sea level can be obtained. This technique was employed to survey the area of Portovenere in Italy, including the San Pietro church located on a steeply sloping rocky promontory, with positional accuracies in the order of 5cm.<P> View Larger Map One of the biggest issues incoastline survey is the... (read more)
2009-06-04 12:00:00

Navy Contract for Ocean Sensors

Falmouth Scientific, Inc. (FSI) has received an US$3.6 million, multi-year contract for supply of conductivity, temperature, depth (CTD) sensors from the U.S. Navy’s Naval Underwater Warfare Center (NUWC) in Newport (RI, USA). The DT-705 sensors are installed on submarines to monitor the surrounding environment. Ocean conductivity, temperature, and depth measurements provided by the sensor are also used to calculate sound velocity, salinity, and density for use in weapons targeting and submarine buoyancy determination. FSI has supplied over 150 DT-705 CTD sensors to the Navy under previous contracts. Sensors supplied under the new contract will be used to instrument Los Angeles... (read more)
2007-05-04 12:00:00

LOG_aLevel Best

General Acoustics has won a comparison test with its LOG_aLevel tide and wave gauge against fifteen different level sensors. The test was ordered by Rijkswaterstaat (RIZA) in The Netherlands and performed by Delft Hydraulics. Tested were different methods of radar sensors, mechanical sensors, optical sensors, pressure sensors and ultrasonic sensors. The goal was to find the best technical solution to build up a monitoring network for the measurement of water level and waves in The Netherlands. (read more)
2005-12-09 12:00:00

New Profiling Instrument for Shallow Water

AML Oceanographic, Canada, is introducing a new profiling instrument at Ocean Business 2013. The Base•X is an entry-level shallow water logging instrument which offers performance at an attractive price. Designed for profiling in coastal waters, the instrument includes a shackle, a sensor cage, and an LED status indicator to simplify deployment preparation. High-speed 25Hz sampling ensures data resolution. Like all other X•Series instruments, the Base•X uses XchangeTM field-swappable sensors. The Base•X is available for use with conductivity, sound velocity, temperature, pressure, and turbidity XchangeTM sensors. This means that sensor heads can be shared with other instruments, regardless of instrument size or type. ... (read more)
2013-04-10 03:20:39

New CTD Plus and New SV Plus

Updated versions of Applied Microsystems' CTD Plus oceanographic instrument and SV Plus sound velocity profiler will be commercially available by end-of-summer of 2004. Major new features of this release include: - Share Remote Sensors: any remote sensor purchased for use with the new Plus can be used with other Applied Microsystems Plus or Micro instruments - USB Data Download: the new Plus comes standard with USB download capability to accelerate access to data once the instrument has been removed from water. Access to the USB port is via a removable threaded cap, which will expose the USB connector. The USB... (read more)
2004-07-28 12:00:00

FSI’s Ships 3’’ CTD to Shirshov Oceanology Institute in Russia

FSI has recently shipped a 3” Micro CTD through its Russian representative, Technopole to Shirshov Oceanology Institute if Russian Academy of Science. The CTD will be deployed in the Baltic Sea up to 500 metres. The CTD was equipped with various sensors including an AMT Dissolved Oxygen sensor, AMT pH sensor, Seapoint Chlorophyll Fluorometer sensor and Seapoint OBS/Turbidity sensor. FIS’s 3” Micro CTD is a high-accuracy CTD with either direct digital output or 2MB datalogging capability. (read more)
2004-05-14 12:00:00
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