SM-975
  • Combined float, release, and modem in one package.
  • Integrated into a glass flotation housing for easy deployment, recovery and storage.
  • Can act as an underwater LBL node, or as an acoustic network repeater.
  • Enough internal space and power to support other PCB systems.
  • Communicates with our UDB-9400 Universal Deck Box and all other Benthos modems.
Detailed Information Below

SM-975 Technical Specs

Overview Specifications Applications Related Products Downloads

​All In One Modem, Float, and Release

Our Smart Modem Acoustic Release Technology (SMART) is a unique concept from Teledyne Benthos that combines the proven technology of an underwater acoustic release with the reliable undersea communications functionality of an acoustic modem.

Our SM-975, or SMART Modem, supports the most current features of the Teledyne Benthos Acoustic Modem line. Similar to our TR-6000, a proven Teledyne Benthos acoustic transponder, the electronics, batteries and a transducer are housed in a glass sphere with a burn wire release mechanism. This self-buoyant modem, however, offers even more capabilities:

  • The glass sphere contains the modem PCB, which allows full telemetry capability to full ocean depth, with RS-232 connectivity to attached sensors.
  • Our SM-975 may operate independently or can function as a node in a small network.
  • Our SM-975 is a modem, float, and release all in one. This decreases equipment cost, integration and deployment costs.
Specification Description
DEPTH

​6,700 meters (22,000 feet)

DIMENSIONS

​13 inches (33 cm) diameter

17 inches (43 cm) diameter

WEIGHT

In Air: ​13 inch = 40 lbs (18 kg)

In Air; 17 inch = 60 lbs (27 kg)

In Water (positively buoyant): 13 inch = 5 lbs (2.26 kg)

In Water (positively buoyant): 17 inch = 30 lbs (13.6 kg)

POWER

588 W - Hr internal batteries

(up to 2 year deployment life)

FREQUENCIES

​Low frequency (LF) 9-14 kHz

Mid frequency (MF) 16-21 kHz

Band C frequency 22-27 kHz

TRANSDUCER

​Omni directional

CONNECTION

​Subconn MCLPBH9M, 9 pin RS-232 cable included

ACOUSTIC RELEASE MECHANISM

​“Burn-wire” type release

BAUD RATE

​140-15,360 bps

BIT ERROR RATE

​Better than 10-7 with high SNR

DATA STORAGE

​704 kByte datalogger standard

PROCESSING

​Data redundancy, 1/2 rate convolutional coding nultipath guard period selection MFSK and PSK modulation schemes.

DISTANCES / RANGE

​2-6 km common, greater distances possible

20+ km available using repearter functionality

ACCESSORIES

​Burn Wire Module (B-270-344)

Burn Wire Retrofit Kit (014534)

Rearming kit (014529)

  • Combined modem and release functions.
  • LBL node.
  • Extended sensor network using a wireless node.
Teledyne Benthos / 49 Edgerton Drive North Falmouth, MA 02556 USA / ISO 9001 Certificate / Terms and Conditions
Phone: (508) 563-1000 / Fax: (508) 563-6444
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