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The AQUAlogger® 310TY is a compact instrument that measures turbidity to 10,000FTU (typical), with optional integral temperature and pressure sensors. It can be used in freshwater and ocean environments, with models for shallow and deep water. The logger ... Morealso features a tool to convert turbidity to suspended sediment concentration using in situ samples.
The AQUAscat® 1000R represents a new generation of high frequency acoustic instrumentation. It has applications in sediment transport studies, including measurement of suspended sediment profiles, precision altimetry, dredge plumes and turbulence.... More

The AQUAscat transmits pulses of high frequency sound on up to four transducers, each of which may operate at a different frequency. It measures the sound scattered by sediment or other suspended materials at discrete spatial intervals programmable from 2½ millimetres to 4 centimetres. For altimetry, this may span a few tens of centimetres; for monitoring sediment suspension profiles, a total range of around 1-2 metres is typical; while dredge plume estimation may extend to 10 metres. The instrument is supplied in a subsea housing suitable for long-term unattended deployments. Batteries for various deployment schedules are available to order.
The Teledyne RESON TC2122 Acoustic Transducer is a 33 kHz and 200 kHz dual-frequency transducer ideal for navigation and hydrographic echosounder systems. The transducer has excellent piezoceramic elements which will ensure the highest reliability and ... Morequality in echosounding. It's compatible with the Teledyne ATLAS Hyfrographic SW 60/28/6029 housing and Teledyne RESON steel housings.
The Teledyne Benthos ALP-365 Acoustic Locator Pinger is an advanced acoustic device that is versatile in the offshore environment. It's rugged aluminum housing ensures long life under extreme conditions. The unit is water activated.
The Teledyne Benthos ALP-365/EL Acoustic Locator Pinger is an advanced acoustic device that is versatile in the offshore environment. It uses six 9V alkaline or lithium batteries, and operates up to 180 days in extreme conditions. It has the same features ... Moreas the ALP-365, but with extended battery life. The unit is water activated.
The Teledyne Benthos ATM-920 Series Acoustic Telemetry Modems represents the next-generation in acoustic modem technology. The ATM-920 Series modem provides wireless communications in up to 2000m water, and comprises a hard-coat anodised aluminum housing, ... Moreintegrated transducer, and internal batteries.
The Teledyne Benthos R2K Mid-Water Acoustic Transponding Release is a full-function acoustic release in a rugged and compact stainless steel housing for use in depths to 2,000 m and loads up to 2,000 kg (4,400 lbs).
The EdgeTech Coastal Acoustic Transponder (CAT) is ideal for deployments in coastal environments. The acoustic command structure is the same as that used in all of our underwater acoustic releases and transponders and is unsurpassed in multi-path environments. ... More

The CAT has been designed for use as an underwater instrument location and positioning aid. They have applications as part of the recovery system on oceanographic moorings and platforms. The precision, high output power and commandable transponder feature make these instruments ideal for use with positioning systems in difficult acoustic environments.

The CAT utilises EdgeTech's field proven Binary Acoustic Command System (BACS) code structure. The BACS coding structure provides 12,000 possible secure command codes. Each transponder is factory programmed with its own unique command set which includes transponder ENABLE, DISABLE. Whenever the instrument receives a command it responds with a status reply message which indicates the orientation of the instrument (tilted or not tilted).

The transponder function can be turned on or off with the ENABLE and DISABLE commands. When disabled the transponder will not reply when interrogated. This ensures that the unit will not interfere with nearby instruments and that no battery energy is wasted replying to interrogate signals meant for other systems
The Valeport MIDAS SVP is the most accurate Sound Velocity Profiler in the world. As well as using Valeport’s digital time of flight sound velocity sensor, it now comes as standard with a 0.01% pressure sensor. Every detail from the sensor accuracy through ... Morethe titanium construction to the large memory and choice of communications methods has been considered - we truly believe it to be the ultimate
Valeport's MIDAS CTD+ is a revolutionary Multiparameter CTD, with a wide choice of standard sensors. Featuring Valeport's latest 400 Series electronics, the CTD+ will sample all fitted sensors at exactly the same instant, at up to 8Hz.... More

Advanced setup software allows a variety of sampling regimes including burst modes, delay starts, and conditional sampling. With up to 64 MB memory and internal battery pack, as well as a selection of real time output formats, the CTD+ is perfect for both profiling or fixed mooring applications. In addition, the CTD+ may be used with Valeport's own water bottle carousel.
The Sonardyne Type 8054 Buoy Positioning Transponder (BPT) has been specifically designed to provide accurate tracking of a vessel relative to an underwater turret buoy or similar. High performance, long battery life, rugged design and ease of installation ... Moreare important operational factors for this transponder.

A number of BPT transponders plus a Fusion USBL system allow accurate range and bearing measurement of the tanker to the buoy. In addition, integral pressure sensors in the transponder provide accurate depth information as the buoy is raised for docking.

Multiple transponder addresses allow for several buoys to be installed in the same vicinity without causing acoustic interference to each other.

The transponders have a long battery life, are extremely compact in size and can be easily handled by one person.

The outcome of the design is an instrument that is easier and safer to
handle, has a low cost and has an extended maintenance period whilst meeting the Ex operating requirements (i.e. safe operation in potentially explosive gas environments). See Type 8053 Gas Safe Transponder.

The use of a transducer mounted at right angles to the main axis of the transponder simplifies mounting by hand or ROV on the buoy structure.