AQUAmodem® Op1L

Optical communications system for short range data transfer – to 500m water depth

Ideal for use by divers and on small ROVs

The AQUAmodem Op1L is a new lightweight version of the standard optical modem, designed for use by divers and on small ROVs. Using established technology, the optical modem allows short range interrogation, commanding and data download from underwater equipment. The AQUAmodem Op1L is compatible with any instrument with an RS232 serial interface, including Aquatec’s AQUAlogger and HYDROlog ranges, and can replace costly ROV mateable connectors or cables, resulting in economical operations and greater flexibility.

Features
Specs
FAQ

Ideal for use with small ROVs

  • The new instrument is three times lighter than the standard optical modem, weighing only 1kg in air, and neutrally buoyant in water, making it ideal for use on small ROVs.
  • Depth rated to 500m, the AQUAmodem Op1L is suitable for applications in oceanographic, environmental and coastal research, as well as offshore energy industries.

Cost-effective

  • The AQUAmodem Op1L provides an economical alternative to deep-water communication systems in shallow water regions.
  • The modem can replace costly ROV mateable connectors or cables, resulting in economical operations and greater flexibility.
  • The latest version is also interchangeable with Aquatec’s original optical modem, and can reduce expenditure costs when combined with existing systems.

Innovative design

  • The AQUAmodem Op1L allows operators to have access to data subsea, which can be particularly useful at times when it is impractical to retrieve the monitoring instruments.
  • The AQUAmodem Op1 is compatible with any instrument with an RS232 serial interface, including Aquatec’s AQUAlogger and HYDROlog ranges.

Ready to use

  • We supply you with everything you need to get started, including cables and manuals.

Technical specification


Environmental

Operating Depth

500 m

Temperature

Operating: -5°C to 40°C
Storage: -40°C to 65°C

Telemetry

Light Band

Cyan visible light

Operating Range

Typically 1 m depending on environment

Transmission Type

Digitally coded telemetry with error detection

Typical Maximum Data Throughput

0.8 kBytes/s (19200 baud version)

10.2 kBytes/s (115200 baud version)

Addressing

Up to 3 unique addresses, plus a universal / broadcast address

Mechanical

Dimensions

285 mm long by 72 mm max diameter; main housing diameter 60 mm

Weight

Approximately 1 kg in air, 0 kg in water

Material

Acetal with Perspex window

Power

External Power

ROV unit 9 - 36 Vdc

Subsea unit 6.5 - 32 Vdc

Wake Up

Serial Wake Up

Optional on receipt of RS232 serial data for subsea unit

On receipt of RS232 serial data for ROV unit

Optical Wake Up

On receipt of optical interrogation

Interface

Electrical

RS232 levels

Protocol

Any format – transparent link

Baud Rate

19200 baud / 115200 baud

Q: Is the modem set up for one or two-way communication?

The AQUAmodem® Op1L is designed to be used to transfer data from an instrument subsea, without the need for a subsea connection. Under the standard application, one modem would be connected to an instrument gathering data. The other would be connected to an ROV or held by a diver, and be used to ‘wake up’ the first modem and receive the transferred data.