Types of Waterproof Submersible Electrical Connectors

Electrical connections are vulnerable to moisture damage, which can lead to short circuits and system failure. Fortunately, waterproof connectors can prevent this problem by creating a seal around the connection point to keep water out.

You can find a variety of waterproof connectors online, including ones that are rated for use in harsh environments. However, some are a bit more expensive than others.

Electrical Tape

A waterproof tape can provide an inexpensive and effective alternative to a specialized electrical connector. It has a rubber, vinyl, varnished cambric, or mastic backing that provides insulation and helps prevent wires waterproof submersible electrical connectors from shorting out during electrical tapping. It can be used to cover exposed ends of stripped wires or to re-tape connections that have fallen off. It can also be slid over wire terminals to protect them from moisture and corrosion.

Many harsh-environment devices, such as portable computers and scanners, are subject to accidental submersion or are used in washdown environments where water is a common cleaning agent. They also need to be able to withstand repeated exposure to extreme temperatures and humidity conditions. These devices need waterproof connectors that are sealed to meet stringent environmental and IP68 ratings.

Fischer Connectors’ UltiMate Series waterproof connectors and cable assemblies are a great choice for these types of harsh-environment applications. They feature 360deg EMC shielding and a robust contact ring to protect against vibration, shock, and corrosion. They can withstand 120m of submersion in unmated or mated condition and have been designed with heavy-duty use in mind.

The 772-E Series Seal-D IP67 Solder-Cup D-Sub Connectors are another option for waterproof connectivity in harsh-environment applications. These circular, push-pull connectors are rated to IP68/IP69 even in their unmated state and can be used in applications such as industrial and medical equipment that is often subject to washing and immersion; remote sensors, gauges, and data loggers; and electrical power and gas metering systems.

Silicone Sealant

The waterproofing properties of silicone are perfect for preventing leakage into or out of devices and installations that need to operate in wet environments. This includes applications such as deep-submarine equipment, pipeline-inspection equipment or oil and gas drilling instruments that require immersion for extended periods of time. These demands require sealed connectivity solutions that combine hermetic sealing with high-strength mechanical designs.

The best waterproof silicones are formulated by Silicone Sealant Manufacturers to withstand extreme temperatures while maintaining their flexibility and elasticity. They also have low chemical reactivity and emit minimal VOCs. The tensile strength of the silicone is adjusted depending on the needs of the application, so a very soft coating can cushion shocks and dampen vibrations while a hard coating is suitable to protect abrasion-prone surfaces or delicate components.

Choosing the right silicone for your application is a critical decision that directly impacts the manufacturing, performance and longevity of a product. A silicone can be adapted to your specific design requirements with the help of expert advice and bespoke formulas that are specially created for you.

Fischer Connectors offers a comprehensive range of waterproof connectors for marine and industrial applications. The SOURIAU SWIM series of dry mate connectors, designed for shallow water immersion, offers reliable protection with shell-to-shell and shell-to-insert shielding. These waterproof connectors feature a robust scoop-proof coupling ring, 360deg EMC shielding and an IP68 rating in both the mated and unmated states.

Epoxy Resin

A well-known material for laminating, surface coating and casting, epoxy resin offers excellent strength, resistance to chemicals and thermal expansion. It is available in a variety of formulations and the properties and sometimes ingredients can be tailored towards specific processes and applications. These resins can also be used in the manufacture of composites with carbon fibre, providing a superior stiffness and strength compared to polyester-based options.

For a waterproof submersible electrical connector, it is a good idea to wrap the wires and connections with suitable waterproof electrical tape before applying a silicone sealant and then use an epoxy resin potting process to ensure there is an effective water barrier protecting the connection from ingress of moisture or water. This can prevent damage to the connections and protect them against faults or short circuits resulting from an exposed electrical cable.

The epoxy potting process is often performed using 3M liquid epoxy waterproof quick disconnect wire connectors splices which are placed in a clear plastic sleeve around the end of the power cable. The sleeve is then filled with the epoxy, burying the cable in the epoxy to provide a water tight seal. The epoxy can be poured very quickly to avoid premature curing and the sleeve should be filled completely so there are no air bubbles within the resin. The relative insensitivity to tolerance buildup and simple fabrication make these epoxy splices ideal for underwater applications.

Glue

Glue is another adhesive used to bond materials together. It can be found in a variety of forms, from organic glues to man-made synthetics. Each type of glue will have its own unique properties and is used for different applications. Using the right glue for the job is important to ensure the adhesive will hold and last as long as possible. Glue is a very versatile product and can be found in many places around the home.

Waterproof connectors are crucial for a wide variety of uses, from medical devices and electronics to power supplies and appliances. These products require peak performance from their electrical systems to avoid malfunctions that may be caused by water damage. Waterproof connectors offer high-level protection to ensure the integrity of these devices.

In a typical waterproof connection, an interface seal prevents ingress of water and harmful particles into the area where male and female contacts mate. The quality of this seal depends on the operating environment, and choosing the right one early in the design process is vital for ensuring the product’s commercial success and durability.

Fischer Connectors offers a range of waterproof connections that can be used in a variety of industrial and marine applications. The SOURIAU SWIM dry mate connector series, for example, is ideal for shallow water immersion and withstands repeated mated/unmated cycles. These connectors use a scoop-proof coupling ring and shell-to-shell shielding to provide a rugged and durable solution. The SWIM series is available in a wide range of styles, contact density layouts and insulator options to support your custom application needs.