Hydroacoustic Technology, Inc.
    Hydroacoustic Technology, Inc.    
 
  Acoustic Tag Tracking Accessories  
 

 > 590-Series Hydrophone - 307 kHz

 
   

HTI hydrophones work perfectly for detecting 307 kHz Acoustic Tags. If your research is in a high-flow environment with flat surfaces for mounting hydrophones, we recommend HTI’s Low-Profile Hydrophone.

All HTI hydrophones have minimal power requirements. Power consumption is a function of cable length. The minimum draw is is 1 Watt in receive mode and 2 Watts in ping mode. At 14 inches (35.56 cm) the 80 kHz hydrophones weighs in at approximately 2.5 lbs. (1.13 kg).

  Hydrophone
   
 
   > 580-Series Hydrophone - 80 kHz
  Designed specifically for use in marine environments, the new 80 kHz hydrophones and 80 kHz Acoustic Tags have a frequency converter making them completely interchangeable with existing HTI receivers and data loggers. Existing users can make the most of their equipment; there is no need to retool with new acoustic tag receivers or data loggers. At 14 inches (35.56 cm) the 80 kHz hydrophones weighs in at approximately 4 lbs (1.81 kg).
   
 
 

 > 594 Low-Profile Hydrophone - 307 kHz

  Low-profile Hydrophone

Similar to the 590-series Hydrophone, the low-profile hydrophone detects 795 Acoustic Tags. It was designed to easily mount onto flat structures. Its ping detection range is 120 degrees, as opposed to the 330 degree detection range of a pole-mounted 590-series Hydrophone.

The low-profile hydrophone is ideal for flat structures in high-flow areas. Height of the low-profile hydrophone is 3.4 inches (8.57 cm) tall by 7.5 inches (19 cm) wide.

 
 

 > 690-Series Hydrophone Cables

Hydrophone Cable
   

HTI's 690-series Hydrophone Cables and 696 Armored Hydrophone Cables were designed to handle rugged aquatic environments. Compared to other cables, they allow significantly less noise from outside electrical sources. These cables are excellent for long term, deep water operations.

   
 
   
 

 > 490-LP Acoustic Tag Programmer

 

The HTI's 490 Acoustic Tag Programmer permits the user to program acoustic tags in the field. To activate, the tag is placed within the programmer’s magnetic coil. The programmer then activates an internal "switch" inside the tag allowing it to receive settings and begin transmission of the tag's signal.

Researchers can now program the various sizes of HTI acoustic tags in the field, in the lab, or in the fish. The 490-LP Acoustic Tag Programmer makes it possible to activate and program Acoustic Tags whenever and wherever you’re ready. Each tag is placed within the new programming coil, which activates an internal switch inside the tag, allowing it to receive settings and begin transmission of its signal. It also has a new built-in detector that confirms the tag has been program-med. And the pulse detector LED light shows when your tag is active (or ‘awake’).

Besides being significantly smaller and lighter, it’s "in-fish ready" (meaning it directly connects to the 491 In-Fish Acoustic Tag Programmer). All acoustic tag settings are easily managed within TagProgrammer software.

Acoustic Tag Programmer
 
Key Features
Program tags in-field or anywhere else. Program tags in-field or anywhere else.
Sized programming coils automatically confirms the programming of each tag. Sized programming coils automatically confirms the programming of each tag.
Small (6" x 6") and light for easy portability. Small (6" x 6") and light for easy portability.
Directly connects with In-Fish Acoustic Tag Programmer. Directly connects with In-Fish Acoustic Tag Programmer.
 
  In-Fish Acoustic Tag ProgrammerModel 491 In-Fish Acoustic Tag Programmer Spec Sheet

 > 491 In-Fish Acoustic Tag Programmer

 
   

HTI's Model 491 In-Fish Acoustic Tag Programmer activates and programs HTI 795 Acoustic Tags after surgical implantation (or gastrical insertion) into the fish. This programmer is used in conjunction with HTI's standard 490LP Acoustic Tag Programmer and a laptop computer. After a fish is tagged, it is allowed to recover from handling and surgery. It is then placed inside the clear acrylic tube filled with ambient water and passed through a magnetic coil to activate the tag immediately prior to release. This extends the life of the acoustic tag battery (compared to the usual activation of a transmitter at time of implantation), providing greater flexibility for field studies.

 
   
   
Key Features
     
   
 
Compact, light, and requires no battery source. Compact, light, and requires no battery source.
Unprogrammed tags can be inserted into fish ensuring fish survival before programming. Unprogrammed tags can be inserted into fish ensuring fish survival before programming.
Allows user to save days on tag life. Allows user to save days on tag life.
Easy portability at less than 6 lbs. Easy portability at less than 6 lbs.
[Plate = 18 inches (45.7 cm) x 6 inches (15.2 cm); internal diameter of tube = 1.75 inches (4.5 cm)].
 
 
  Acoustic Tag Detector

 > 492 Acoustic Tag Detector

   
   

The 492 Acoustic Tag Detector is used to verify at close ranges that a tag (alone or in a fish) is successfully transmitting. The unit verifies a tag’s pulse repetition interval (i.e. rep rate) by observing an LED light which flashes at the same interval as the pulse interval programmed for that tag. It’s powered by an internal
9 volt battery and signals when the battery reaches a low charge condition. A small probe at the end of a cable is placed in the water to detect the tag's transmit signal.

 
   
         
   
       
       
   > 692 Cable Hydrophone Tester    
 


This simple device was designed to determine when a cable and/or a hydrophone are not functioning or are shorted. The 692 CHT (Cable Hydrophone Tester) is perfect when needing to determine which cable or hydrophone may be having electrical issues or is simply not functioning.

Often times, when covering large hydrophone arrays, for example in a marine environment where cable may be extended for over a kilometer for an acoustic tag hydrophone array, multiple consecutive cables may be needed to cover the area. If one cable gets damaged, it can be challenging to decipher which cable or hydrophone  needs attention. The 692 CHT makes it possible to determine whether the cable/hydrophone is broken or shorted in minutes.

   
  Model 692 Cable Hydrophone Tester    
     
 
Key Features
Simple Design to Determine if the Cable and/or Hydrophone is:

     Functioning Properly = Solid Green Light
     Damaged  / Needs Repair = Flashing Red Light
     Experiencing an Electrical Shortage = Solid Red Light
Sized programming coils automatically confirms the programming of each tag. Works with all HTI Cables and Hydrophones
Small (6" x 6") and light for easy portability. Waterproof
Directly connects with In-Fish Acoustic Tag Programmer. Buoyant
 
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