HYDROlog™ 3100

Test pressure and ambient temperature – up to 1400 bar

High accuracy hydrotest loggers - deck versions

Deck versions of the latest hydrotest loggers from Aquatec…

…making surface training, testing and onshore hydrotesting cost-effective and efficient

The HYDROlog 3100 instruments take the core functionality of the new HYDROlog 3000 subsea units and combine them with robust cases and user friendly interfaces to create deck versions. This allows surface training and testing to be completed with ease, as well as making onshore hydrotesting cost-effective and efficient. Available in a variety of models, the new deck logger range is a valuable tool for testing.

The rugged cases contain a single panel with all connectors in the interior, making it easy to transport without damage. The instruments are available with an optional integrated tablet, removing the need for a separate PC. If external power is not available, the HYDROlog 3100 can be supplied with internal batteries. The HYDROlog 3100PT measures ambient temperature and test pressure to 1400bar, with ±0.05%FS accuracy and ±0.01%FS precision pressure (to 1000bar). The HYDROlog 3100PT is available in two additional models - one measuring gauge pressure, and one measuring two test pressures in the same compact and efficiently designed instrument. The HYDROlog 3100F is a flow monitoring instrument with additional test pressure and ambient temperature sensors. The standard model monitors 1 external flow sensor, with custom options are available for multi-channel flow monitoring.

High accuracy and precision pressure

  • ±0.05%FS accuracy
  • ±0.01%FS precision (to 1000bar), ±0.05%FS precision (to 1400bar)
  • A variety of sensor options to optimise the specification – 300bar, 600bar, 1000bar, 1200bar, 1400bar

The simple way to monitor flow (HYDROlog 3100F models)

  • Standard instrument monitors one external flow sensor – TTL or sine wave
  • Live sensor view via AQUAtalk when connected
  • Multiple flow sensors and pressures can be monitored with the HYDROlog 3000Fc custom range, which utilises Aquatec’s innovative smart sensor interface
  • Example custom configuration: 8 flow sensors (measuring flow and concentration) and 3 external pressures

Robust and efficient design

  • Core functionality of HYDROlog 3000 subsea units in a compact and durable case
  • Contains single panel with all connectors in the interior, shielded from knocks and making transport easy
  • Internal batteries supplied if no external power source is available
  • Optional integral tablet, giving a completely self-contained system

Flexible deployment

  • All instruments log data internally and have real time reporting capability as standard
  • Choose your sampling regime with continuous and burst sampling options

Designed with operational efficiency in mind

  • Deployment wizard to allow quick and easy logger set up
  • Test data outputs as an industry standard csv file and report
  • Easily transportable with alkaline and NiMH battery options

Diverse range

  • User-changeable standard AA size batteries available across the world – purchase locally or order direct from Aquatec
  • Service and support plans available at time of purchase or at any time during ownership

Easily integrated into your subsea equipment

  • In addition to the standard HYDROlog 3100PT test pressure and temperature logger, the deck version is also available as a gauge pressure logger (measuring test and ambient pressure) and a logger measuring 2 test pressures within one compact case.

Ready to use

  • We supply you with everything you need to get started, including software, cables, maintenance kit and a manual.
  • Aquatec Solutions for ocean instruments

Sensor specification




Sensor type


Piezo-resistive bridge


-2 to 30°C standard, other ranges on request

Absolute: 301, 601, 1001, 1201, 1401 bar



±0.05% full scale over temp range

Precision ±0.1°C

±0.01% full scale over temp range (to 1000bar)

±0.05% full scale over temp range (to 1400bar)



0.002% full scale

Logger specification

Flow sensor type 5V TTL or Sine wave
Parameters Test pressure, ambient temperature, battery voltage, flow rate, flowed total volume, concentration (on custom version)
Data storage capacity

64MB in non-volatile FLASH (standard)

Up to 2GB (upgrade)

Logging lifetime

Depends on logging parameters - up to 1 year

Data retention

>20 years


Burst or continuous

Acquisition rate

Up to 8 Hz depending on sensor

Burst averaging

Flexible averaging of multiple samples within burst


RS232 or RS422 and USB

External interfaces

AQUAdisp subsea display, AQUAmodem Op2 optical modem


Selected from alkaline, lithium or NiMH


AQUAtalk for Windows for configuration and download


¼” NPT, BSP or Autoclave

Material Injection moulded resin
Weight <8kg in air