SoundTrap ST640 HF – Four Channel Long Term Recorder

USD $7,000.00

Available on backorder

SKU: ST640HF Category:


The SoundTrap ST640HF is a four channel digital acoustic recorder for ocean acoustic research. Its ability to record synchronous audio on four channels make it ideal for creating tetrahedral arrays for sound localisation and particle motion studies.

Key features:

  • Selectable 1 to 4 channel recording
  • 4 x individual wet plugs for HTI hydrophones
  • 384 kHz x 4 channel sampling
  • Bandwidth 20 Hz – 150 kHz 
  • 4 x microSD provide up to 2 TB of removable data storage
  • Up to 50 days continuous 4 channel recording on 12 Panasonic NCR18650 rechargeable batteries
  • Rugged Titanium housing
  • Up to 500m depth rating 

The ST640 HF can record signals from up to four hydrophones connected via the four wetplugs on the base of the recorder. The hydrophones are the pre-amplified type, and can be on long cables to enable array spacing’s of several meters. Suitable hydrophones can be specified with various gain and bandwidth options.

Output files are in the industry standard WAV format. Ancillary sensors are included for logging temperature and tri-axial acceleration. The included software offers flexible deployment options for channel selection, sample rate, delayed start and duty cycle.

Rated to 200m depth. Upgradeable to 500m by installing an optional Prevco 03395-001 pressure relief value from here.

Price includes 256GB of memory, remote, cables and software.

Hydrophones are NOT included with the ST640HF

The ST640 is desgined for use with HTI hydrophones, which must be purchased directly from High Tech Inc USA. Please discuss your requirements with them directly.

ST640 recorders use Panasonic NCR18650B (flat top) lithium ion batteries. Batteries are are not supplied with the recorders due to battery shipping restrictions. They are available in most countries and we recommend purchasing  in the country in which the recorders are to be used to avoid air transport issues. A battery charger will also be required. We recommend the XTAR VC4 or similar.

Please note this product is special order – up to 28 week lead time. Please enquire for details.

Spec sheet available here.

Additional information

Weight 2.5 kg