SiS Sensoren Instrumente Systeme GmbH Subsurface Mooring Monitoring Beacons

SiS Sensoren Instrumente Systeme GmbH

SMM 500, 2000 and 6000 Subsurface Mooring Monitoring Beacons

SMM 500 and 2000 Photo

Sub-surface Mooring Monitoring remotely monitors underwater moorings that may accidentally rise to the surface. If the mooring breaks, the platform floats to the surface and starts transmitting. The features are:

Titanium housing
Up to two years mooring life (up to 6 months in euphotic zone)
Up to 3 months transmission life (SMM 500) or up to 6 months (SMM 2000 and 6000)
Powered by 5 D-type Lithium batteries (5 or 10 for SMM 2000 and 6000)
ARGOS platform terminal transmitter

Water depth up to 500, 2000 or 6000 metres respectively
Trigger threshold 4 metres (SMM 500) or 30 metres (SMM 2000 and 6000)
Double O-ring seals
Antenna protected by Delrin dome (SMM 500) or Delrin cage (SMM 2000 and 6000)
Triggered by pressure switch

CLS Service Argos has developed a special service for monitoring the status of the moorings. Normally a submerged Platform Transmitter Terminal (PTT) remains silent and undetected by the Argos satellites. Should the mooring break loose however, and the PTT rise to within a few metres of the surface, it will begin to transmit. An alarm state is set upon reception of the signal by an orbiting satellite and recognition and processing at a ground centre. A warning that the mooring line has surfaced, with its position, will be sent to the user by facsimile. Thereafter each satellite pass will result in another location. This will continue until cancelled by the user.

Specifications

	SMM 500	SMM 2000	SMM 6000
Mooring depth	500 m	2000 m	6000 m
Pressure switch threshold	3 - 5 m	25 - 35 m	25 - 35 m
Dimensions (l x d)	853 x 60.3 mm	742 x 89 mm	742 x 89 mm
Mass without batteries	3.8 kg	6.7 kg	6.7 kg
Displacement	2.4 dm³	3.1 dm³	3.1 dm³
Power supply (without option X)	5 pcs. Lithium D cells	5 or 10 pcs. Lithium D cells resp.	5 or 10 pcs. Lithium D cells resp.
Mooring life	up to 2 years	up to 2 years	up to 2 years
Mooring life in euphotic zone	up to 6 months
Transmission life	3 months	3 or 6 months resp.	3 or 6 months resp.

Options

Option X switch mode power supply for extended battery range from NC batteries via Alkaline to Lithium batteries. The X-option may be installed in all systems retrospectively.
Stowage case for SMM 2000 and SMM 6000

Additional Information

SiS GmbH reserves the right to change specifications without prior notice.