Depth & Temperature Sensor ISD4000

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Video ISD4000 Test tank


Video ISD4000 seaView software demo


Video ISD4000 Multiple sensors running together


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The ISD4000 is a compact, survey grade Depth & Temperature Sensor.

Optionally, the unit can also be provided with an integrated Attitude and Heading Reference System (AHRS).  This provides highly stable HeadingPitch and Roll readings.


The ISD4000 is a compactsurvey grade Depth & Temperature Sensor.

Optionally, the unit can also be provided with an integrated Attitude and Heading Reference System (AHRS).  This provides highly stable Heading, Pitch and Roll readings.

Quick facts:

0.01% FS Depth Accuracy

0.01ºC Temperature Accuracy

Integrated AHRS (Headidg, Pitch, Roll)

Software to View, Log & Configure

RS232 And RS485 Interfaces

Robust & Compact Housing

In-Field Firmware Updates

Emulate Any Device

Survey Grade



temperature compensated piezo-resistive pressure sensor is used to determine Depth to 0.01% Full Scale accuracy.

Available in a variety of pressure ranges (10, 30, 50, 100, 300, 400 & 600 Bar) ensures that the highest level of accuracy can be achieved for any depth of application.

Depth can be provided at any rate up to 100 Hz – ideal for precision control and monitoring applications.


Resistance Temperature Detector (RTD) probe provides temperature to 0.01 degrees C accuracy.

The RTD is located directly inside the temperature probe, placing it exceptionally close to the water.  This enables a very high accuracy temperature reading to be obtained, with exceptionally low latency.

Attitude & Heading Reference System (AHRS)

Optionally available on the ISD4000 is an integrated Attitude & Heading Reference System (AHRS) providing Heading, Pitch & Roll.

The AHRS is based on Micro-Electrical-Mechanical-System (MEMS) based technology.

Within the ISD4000 there are three MEMS based GyrosAccelerometers & Magnetometers.  The outputs from each of these MEMS devices are fused together, providing highly stable Heading, Pitch & Roll.

The Heading is highly resilient against temporary magnetic interferes.  This is aided by a soft and hard iron calibration feature once the unit has been installed on the ROV, AUV or other underwater application.





Provides Depth readings to 0.01%FS,  Ideal for survey operations.

The high update rate (up to 100Hz) is highly applicable for use with auto depth systems.

Temperature is provided along with Heading, Pitch & Roll – ideal for basic navigation.


Equipment Monitoring:

Monitor the depth during deployment together with the Pitch, Roll and Heading of the equipment.

Provides a clear understanding of equipment position and attitude.


Deflection Monitoring :

Using multiple ISD4000 units, monitor the deflection of a subsea structure.



Depth & Temperature are provided to survey grade – ideal for any survey.


Motion Reference:

The integrated gyros, accelerometers & magnetometers provide highly stable Pitch, Roll & Heading in addition to Depth & Temperature.


Video ISD4000 Test tank


Video ISD4000 seaView software demo


Video ISD4000 Multiple sensors running together


STEP Files ISD4000


Manual ISD4000



Impact SubseaISD4000Marine Distribution & ConsultingDepth & Temperature SensorAHRS,  AUV, ROV, MDC, France, capteur de profondeur et de températurerelevé marin



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