Equipment / AMAR G4

Autonomous Multichannel Acoustic Recorder
Generation 4

JASCO's underwater acoustic recorder and oceanographic observatory, the Autonomous Multichannel Acoustic Recorder Generation 3 (AMAR G3).



Maximum depth:                    500 m (standard acetal housing)
                                               250 m (PVC housing)
                                               3500 m (anodized aluminum housing)
                                                6700 m (Ultra Deep glass sphere housing)
Operating temperature:         −5 to 50 °C
Storage temperature:             −18 to 55 °C
Vibration resilience:                Tested to withstand transport by air, ground, and vessel

Hydrophones & arrays

Customizable options from various manufacturers. 
Sensitivities and frequencies tailored to your needs. 
Example sensitivities:            −164 dB re 1 V/μPa @ 1 kHz
                                               −210 dB re 1 V/μPa @ 1 kHz

Example frequencies:            1 Hz to 50 kHz
                                               5 Hz to 100 kHz
                                                20 Hz to150 kHz

Acoustic sensors:                   Omnidirectional hydrophones
                                               Directional hydrophones
                                                Vector sensors
                                                Small linear arrays
                                                Small spatial arrays


Operating voltage:                  7–28 Vdc
AC power adapter:                 110–240 V, 50–60 Hz, 0.5 A
Batteries: Alkaline, others upon request
Various external battery pack options for each depth rating.

Memory, recording, and timing

Removable flash memory:   Up to 10 TB on 512 GB SD cards
Data format:              WAV, CSV
Optional TCXO:      0.7 ppm w/ 1 ppm aging in first year accuracy, can sync to PPS
Optional CSAC:                      10 ppb/year accuracy, can sync to PPS

Four acoustic channels

Resolution:                              24 bits
Sample rates:                          8–512 ksps sampled synchronously
Spectral noise floor:               Better than −150 dB re FS per root Hz at all sample rates

Seven oceanographic sensor channels

Sensor options:                      Oxygen
                                               Orientation (roll-pitch-yaw)
                                               Others upon request
Four analog channels:
        Sample rate:                   1 sps
        Resolution:                    10 bits
        Voltage:                          0 to +5 V

Up to three serial channels:  One RS-232 and
Two configurable as RS-232, RS-422, RS-485, or 3.3 V logic level

Wireless communications

Configure via Wi-Fi
Magnetic reed switches to start and stop recording

Due to continued product improvement, these specifications are subject to change without notice.

Contact us for pricing and customization options.