Valeport Ltd

- Self Recording Tide Gauge

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The miniTIDE is a small Tide Recorder, designed for short term underwater deployments. Fitted with a 0.01% temperature compensated piezo-resistive cell, the miniTIDE will record high accuracy pressure data for a period of 1 month at a 10 minute sampling interval, using a single alkaline C cell. This makes it ideal for use in short term projects or for academic studies. Available with a choice of pressure ranges, and with either 500m acetal or 6000m titanuim housings.

Sensors

  • The miniTIDE is fitted with a novel temperature compensated piezoresistive pressure transducer that offers levels of performance previously only available from costly resonant quartz transducers.

Pressure

  • Range: 10, 30, 50, 100, 300 or 600 Bar
  • Resolution: 0.001% range
  • Accuracy: ±0.01% range

Data Acquisition

  • The miniTIDE features a selection of pre-programmed sampling patterns, allowing the device to monitor (and average) pressure readings for a number of seconds at regular time intervals, e.g. 40 seconds sampling every 10 minutes.
  • Alternatively, the instrument may be set to output data at a fixed sample rate of 1 or 2 Hz, for continuous monitoring applications.

Communications

  • The instrument will operate autonomously, with setup and data extraction performed by direct communications with PC before and after deployment. It also operates in real time, with a choice of communication protocols fitted as standard and selected by pin choice on the output connector:
    • RS232 Up to 200m cable, direct to serial port
    • RS485 Up to 1000m cable
    • Baud Rate: 4800 - 460800
    • Protocol: 8 data, 1 stop, No parity, No flow control

Memory

  • The miniTIDE is fitted with a solid state non-volatile Flash memory, capable of storing over 30 million lines of data.

Electrical

  • Internal: 1 x C cell, 1.5v alkaline or 3.6v lithium
  • External: 9 - 28vDC
  • Power: <200mW
  • Battery Life: 30 days (alkaline) @ 40 secs / 10 mins, 80 days (lithium) @ 40 secs / 10 mins
  • Connector: Subconn MCBH10F

Physical

  • Materials: Acetal or titanium housing (as ordered), acetal lock ring and transducer cap
  • Depth Rating: 500m (acetal)
  • 6000m (titanium)
  • NB: Maximum deployment depth may be limited by transducer range
  • Instrument Size: 48mmØ, 270mm long (including connector)
  • Deplyment cage: 110mmØ x 450mm long
  • Weight:
    • 0.7kg (acetal)
    • 1.4kg (titanium)
  • Shipping: 51 x 42 x 27cm, 10kg

Software
System is supplied with DataLog Express Windows based PC software, for instrument setup, data extraction and display. DataLog Express is license free.

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