Instrumentation • Electronics
Fig. 1. This inspection ROV can be operational at depths of 150m.
Sealed connector and cable solutions for harsh environments
Selecting the right connector and cable assembly solution for an application is an important and challenging process, in particular when the operating environment requires sealed equipment. Stéphane Rohrbach reports.
T
he connector selection process becomes critical when the application involves sealing the connectors against various environmental conditions. Harsh situations include salt water for a remotely operated underwater vehicle (Fig. 1.)
or vacuum in research instrumentation. Leakages occur due to gaps and other paths in the connector body, the insulating material, the contacts or the wires. They impact insulation characteristics as well as the functions of the equipment and eventually cause complete failure. In some cases, the efficiency of an application can become critical. Imagine a faulty diver’s communication equipment or defective weather and navigational systems. The key to achieving the optimum sealing solution is
an accurate initial analysis of the specific conditions that the device will encounter in the operating environment.
Parameters such as the type of substance blocked by sealing, the type of exposure (splash, jet or immersion) and duration, the pressure differential or the operating temperature range are crucial for sealed connectors. These restrictions can have a significant impact on connector performance. Critical applications require a thorough analysis and a risk evaluation. Fischer experts are trusted partners to help customers equip their application with the most suitable connector and cable assembly solution during the product development process.
Protection and sealing techniques
The careful analysis of operating conditions is essential to determine the appropriate sealing technique, along with the material to be used for the required degree of protection. There are various levels of sealing protection available for connectors. They can be broadly classified into two groups:
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