Compact deepwater temperature logging in a titanium housing

The HYDROlog® 3400 is a compact deepwater temperature logger designed for long-term offshore and subsea deployments. Rated to 11,000 m and housed in titanium, it provides temperature measurement and onboard data storage in a small Ø21 mm x 135 mm format.

With a measurement range of -40 °C to +85 °C, high-resolution temperature readings and capacity for up to 50,000 samples, the HYDROlog® 3400 supports demanding deepwater applications including wellbore monitoring, drilling temperature monitoring, subsea Christmas tree monitoring, umbilical temperature profiling and riser system monitoring.

DATASHEET

Features

Discover the innovative features that set our products apart, designed to streamline your workflow, enhance efficiency, and provide a seamless user experience tailored to your specific needs.

01

Extreme-depth temperature monitoring

  • Rated for deployments to 11,000 m
  • Designed for demanding offshore and subsea environments
  • Suitable for deepwater monitoring applications where depth rating and compact size are critical

02

Compact titanium construction

  • Titanium housing for deepwater deployment
  • Small Ø21 mm x 135 mm format for installations with limited space
  • Compact design suitable for integration into subsea systems and equipment

03

Wide temperature measurement range

  • Measures across a -40 °C to +85 °C temperature range
  • Provides high-resolution temperature readings
  • Multipoint temperature calibration supports consistent measurement performance

04

Onboard data storage

  • Stores up to 50,000 samples
  • Supports long-term temperature logging during offshore and subsea deployments
  • Flexible logging interval allows the sampling regime to be configured for the application

05

Simple setup and data access

• Standard USB interface for connection and download
• AQUAtalk™ software supports deployment, download and data export
• Delayed start functionality supports planned deployment schedules

Specifications

Explore the advanced capabilities of our instruments and systems through their technical specifications.

DimensionsØ21 mm x 135 mm
HousingTitanium
Depth rating11,000 m
Range-40 °C to +85 °C
Resolution0.03 °C across temperature range
Data resolution12-bit
CalibrationMultipoint temperature calibration
MemoryUp to 50,000 samples
ConnectionStandard USB interface
SoftwareAQUAtalk™ for deployment, download and data export
PowerIntegrated lithium battery
SamplingFlexible logging interval
Start modeDelayed start functionality