Depth Meter for Online/Offline Operation


Handy precision pressure transmitter and recorder



This light and handy measuring instrument provides accurate pressure data during operations of plankton nets, water samplers and other sampling equipment in limnological and oceanographic applications. It can be used in online mode with integrated long-distance telemetry via electro-mechanical towing cables as well as in self-contained mode with data recording inside its internal data memory. The system consists of a titanium pressure housing with integrated sensor, electronics, rechargeable batteries. A splash-proof hand unit is the link between underwater unit and PC during online operations. The state-of-the-art electronics, optimised in power consumption, are designed for ambient temperatures from -40°C up to +85°C. The maximum operational depth is 3000 meters. The Depth Meter is delivered with the data acquisition software OceanLab 3, an easy-to-use package for pre-deployment system set-up, real-time data acquisition, data visualisation, storing and export.


  • Combined online/offline use

  • Compact size and low weight

  • Bi-directional communication

  • Standard depth range 3000 m

  • Long-distance FSK-telemetry (>10000 m)

  • Low power consumption

  • Battery operated Underwater Unit, max. voltage of 5 V at the conductor cable

  • Electronics operate from -40°C up to +85°C

  • EC-conformity (CE) EN 50081-1, EN 50082-1

Measuring range0 ... 3000 dbar ± 0.1% f.s.
Data memory4 MByte, sufficient for
290 hours recording
Data sampling rate1 Hz (one data set per second)
Telemetry connectorSUBCONN IL 2 M
Dimensions45 mm dia. x 230 mm
Weight1 kg
Hand UnitPlastic housing, splash-proof (IP 65), battery
powered, LC-display 4 x 20 characters,
interface for PC (RS-232)
450 400Depth Meter for online/offline operation incl. hand unit,
battery charger and OceanLab 3 software