About us

Selectronix Onboard Ltd

Selectronix Onboard Ltd are an ISO 9001 authorised distributor of connectors, enclosures and manufacturer of cable assemblies. We specialise in waterproof connectors, waterproof assemblies, waterproof vents, glands and associated parts. We are experienced in harsh environment applications - waterproof RJ45 for example, or waterproof USB, IP67 & IP68. As a result our product range is unique and unlike most connector distributors you know. Our experience covers many market types, allowing us to get to the root of an issue straight away. We also provide traditional electronic connectors & components for 'normal' electronic & electrical applications.

We specialise in vents, whether they are standard pressure equalisation vents or vents for acoustic applications. Our experience takes the doubt away from your decision. Choosing the right Acoustic vent is not an easy task and our experience and knowledge helps.


Products

105 x 66 x 33mm FRABS IP65 Black Plastic Enclosure Thick Wall

105 x 66 x 33mm FRABS IP65 Black Plastic Enclosure Thick Wall

We pride ourselves on being the most reliable suppliers of 105 x 66 x 33mm FRABS IP65 Black Plastic Enclosure Thick Wall backed by excellent levels of...

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115 x 90 x 51mm Diecast Aluminum IP66 Watertight Small Enclosure

115 x 90 x 51mm Diecast Aluminum IP66 Watertight Small Enclosure

We are one of the leading suppliers of 115 x 90 x 51mm Diecast Aluminum IP66 Watertight Small Enclosure in the UK. For more details about 115 x 90 x 5...

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120 x 59 x 31mm Diecast Aluminum IP66 Watertight Small Enclosure

120 x 59 x 31mm Diecast Aluminum IP66 Watertight Small Enclosure

We are one of the UK’s leading supplier of 120 x 59 x 31mm Diecast Aluminum IP66 Watertight Small Enclosure. Speak to a member of our team today at +4...

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120 x 65 x 40mm IP66 ABS Grey Enclosure

120 x 65 x 40mm IP66 ABS Grey Enclosure

We are the market leading experts in 120 x 65 x 40mm IP66 ABS Grey Enclosure in the UK. Get more details on 120 x 65 x 40mm IP66 ABS Grey Enclosure by...

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120 x 65 x 60mm ABS IP66 Watertight Grey Styled Lid Enclosure

120 x 65 x 60mm ABS IP66 Watertight Grey Styled Lid Enclosure

Want to find a reliable company offering 120 x 65 x 60mm ABS IP66 Watertight Grey Styled Lid Enclosure? You have come to the right spot! We are provid...

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121 x 94 x 35mm FRABS IP54 Grey Enclosure With Stand Offs

121 x 94 x 35mm FRABS IP54 Grey Enclosure With Stand Offs

We are the reliable suppliers of 121 x 94 x 35mm FRABS IP54 Grey Enclosure With Stand Offs in the UK. Want more details on 121 x 94 x 35mm FRABS IP54 ...

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15 Way Filter Adaptor T

15 Way Filter Adaptor T

Want 15 Way Filter Adaptor T? No need to go anywhere else! We are market leading company suppliers of 15 Way Filter Adaptor T in the UK. For any query...

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160 x 100 x 81mm Diecast Aluminium IP66 Thick Wall Watertight Enclosure

160 x 100 x 81mm Diecast Aluminium IP66 Thick Wall Watertight Enclosure

We are the industry-leading supplier of 160 x 100 x 81mm Diecast Aluminium IP66 Thick Wall Watertight Enclosure. Speak to a member of our team today a...

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160 x 160 x 90mm ABS IP66 Grey Enclosure

160 x 160 x 90mm ABS IP66 Grey Enclosure

We are a reputed company providing 160 x 160 x 90mm ABS IP66 Grey Enclosure in the UK. Get more details on 160 x 160 x 90mm ABS IP66 Grey Enclosure by...

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160 x 90 x 60mm ABS IP66 Watertight Grey Styled Lid Enclosure

160 x 90 x 60mm ABS IP66 Watertight Grey Styled Lid Enclosure

Are you looking for 160 x 90 x 60mm ABS IP66 Watertight Grey Styled Lid Enclosure? You have come to the right place! We are one of the leading compani...

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167 x 107 x 65mm FRABS IP54 Black Thick Wall Enclosure

167 x 107 x 65mm FRABS IP54 Black Thick Wall Enclosure

Looking for 167 x 107 x 65mm FRABS IP54 Black Thick Wall Enclosure? We are here to help you! We can help you with our reliable 167 x 107 x 65mm FRABS ...

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3 Pin Fem Cable Power Solder

3 Pin Fem Cable Power Solder

Waterproof Connectors For Industrial Automation Here at Selectronix Onboard Ltd, We supply waterproof membrane vents to allow sealed devices to equal...

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3 Pin Male Cable Power

3 Pin Male Cable Power

Waterproof Connectors For Industrial Automation Here at Selectronix Onboard Ltd, We supply waterproof membrane vents to allow sealed devices to equal...

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60 x 55 x 26mm Diecast Aluminum IP66 Watertight Small Enclosure

60 x 55 x 26mm Diecast Aluminum IP66 Watertight Small Enclosure

We are the UK leader in 60 x 55 x 26mm Diecast Aluminum IP66 Watertight Small Enclosure. Speak to a member of our team today at +44 (0) 118 9817387 fo...

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65 x 65 x 40mm IP66 ABS Grey Enclosure

65 x 65 x 40mm IP66 ABS Grey Enclosure

We have made a good name in the market for 65 x 65 x 40mm IP66 ABS Grey Enclosure. Want more details on 65 x 65 x 40mm IP66 ABS Grey Enclosure? Please...

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ABS IP66 Watertight Grey Styled Lid Enclosure

ABS IP66 Watertight Grey Styled Lid Enclosure

We are market leading company suppliers of ABS IP66 Watertight Grey Styled Lid Enclosure in the UK. 160 x 90 x 60mm ABS IP66 Watertight Grey Styled Li...

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ABS Plastic Enclosure Specialists

ABS Plastic Enclosure Specialists

Waterproof Connectors For Industrial Automation Here at Selectronix Onboard Ltd, We supply waterproof membrane vents to allow sealed devices to equal...

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ABS Plastic Enclosures

ABS Plastic Enclosures

We are a highly reputable company supplying ABS Plastic Enclosures in the UK. For more details about ABS Plastic Enclosures, please feel free to conta...

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Acoustic Adhesive Vent

Acoustic Adhesive Vent

We are a highly reputable company supplying Acoustic Adhesive Vent in the UK. For more details about our Acoustic Adhesive Vent, please feel free to c...

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Acoustic Vent Black Adhesive Patch

Acoustic Vent Black Adhesive Patch

Want to find a reliable company offering Acoustic Vent Black Adhesive Patch? You have come to the right spot! We are providing Acoustic Vent Black Adh...

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Acoustic Vent Black Adhesive Patch 200kPa 10x6mm

Acoustic Vent Black Adhesive Patch 200kPa 10x6mm

We pride ourself being the most reliable suppliers of Acoustic Vent Black Adhesive Patch 200kPa 10x6mm. Acoustic Vent Black Adhesive Patch 200kPa 10x6...

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Acoustic Vent Black Adhesive Patch 200kPa 10x6mm

Acoustic Vent Black Adhesive Patch 200kPa 10x6mm

Want Acoustic Vent Black Adhesive Patch 200kPa 10x6mm? No need to go anywhere else! We pride ourself being the most reliable suppliers of Acoustic Ven...

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Acoustic Vent Black Adhesive Patch 200kPa 5.6x3mm

Acoustic Vent Black Adhesive Patch 200kPa 5.6x3mm

Looking for reliable Acoustic Vent Black Adhesive Patch 200kPa 5.6x3mm? We are here to help you! We are one of the leading most reliable company provi...

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Adhesive Vent Patch Grey

Adhesive Vent Patch Grey

Waterproof Connectors For Industrial Automation Here at Selectronix Onboard Ltd, We supply waterproof membrane vents to allow sealed devices to equal...

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Amphenol LTW Specialist Suppliers

Amphenol LTW Specialist Suppliers

Waterproof Connectors For Industrial Automation Here at Selectronix Onboard Ltd, We supply waterproof membrane vents to allow sealed devices to equal...

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Black Acoustic Adhesive Vent

Black Acoustic Adhesive Vent

Are you looking for Black Acoustic Adhesive Vent? You have come to the right place! We are one of the leading companies providing Black Acoustic Adhes...

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Black Acoustic Vent

Black Acoustic Vent

We pride ourselves on being the most reliable suppliers of Black Acoustic Vent backed by excellent levels of service and technical support. If you nee...

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Black Acoustic Vent 10x7mm IP68 3M/30min

Black Acoustic Vent 10x7mm IP68 3M/30min

We pride ourself being the most reliable suppliers of Black Acoustic Vent 10x7mm IP68 3M/30min. If you need to keep your electronics free from dust an...

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Black Acoustic Vent 11x5mm IP68 3M/30min

Black Acoustic Vent 11x5mm IP68 3M/30min

We are one of the leading most reliable company providing Black Acoustic Vent 11x5mm IP68 3M/30min in the UK. If you need to keep your electronics fre...

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Black Acoustic Vent 14x9mm IP68 3M/30min

Black Acoustic Vent 14x9mm IP68 3M/30min

We are market leading company suppliers of Black Acoustic Vent 14x9mm IP68 3M/30min in the UK. Black Acoustic Vent 14x9mm IP68 3M/30min - If you need ...

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Vent Information

Helpful information about waterproof membrane vents!

Helpful information about waterproof membrane vents!

What is the function of a membrane vent?

Venting is essential to enable the proper functioning of high end technical electronic devices as well as basic everyday products. Vents allow pressure to escape, they protect electronics from contaminants entering the product, they aid cooling, help prevent condensation, all of these features help the correct functioning of your device, maintaining its lifespan.

Typically your product is fully sealed, the gaskets all working and when closed nothing gets in or out. This is where the vent is required. Placing a hole in your product then placing one of our adhesive vent patches over that hole keeps the product waterproof and prevents dust and any other contaminants entering. The size of the hole and the number of vents depends on a number of issues. We can assist you to select the best membrane vent material for your device/application.

The membrane vent’s main function is to allow pressure to pass through. In a sealed device, as sunlight hits the device or as the temperature rises, so does the pressure inside the box. This pressure has to escape otherwise constant stress is placed on your product’s seals/gaskets. Conversely, as the temperature reduces, so does the pressure, without a vent, the sealed box/device will attempt to suck the outside world into your device. Through time this will damage the product’s seals and potentially create a point of failure for ingress to occur.

Any moisture that builds up within the sealed device as a result of condensation, could affect your product’s electronics. A vent allows that moisture to escape, preventing condensation from forming. This is why it is rare to see condensation in a vehicle headlamp these days unlike the past - as they are all now vented. The moisture can now escape.

Devices with batteries require vents to deal with gassing, to maintain a safe performance of the device.

Automotive applications

Vents are used all over a vehicle, most obviously in the vehicle’s lights. Without a vent, pressure builds up and eventually, its seals will fail. Condensation is created due to the constant change in temperature – a vented light unit allows that condensation to escape. Vents are used in areas such as the engine ECU, battery compartments, advanced electronics, on numerous sensors, car seats, actuator vents, fluid system caps, the list is long.

Without a quality vent your headlamp would very soon mist up – due to condensation, a vented headlamp or signal lamp will not.

Protection of outdoor electronics

Weather creates a number of issues for a sealed device. Engineers will develop a robust box to withstand what the world throws at it, sunlight hitting the unit and massively increasing the pressure within, rain & sandblasting the device, if the product is vented, the pressure is equalised and your device will not attempt to suck in the rain/dust sitting on the outer walls. As a device is moved from one environment to another, temperatures can change, for example, moving a truck from a refrigerated cold store, back out to the outside world – this creates a rapid change in temperature and all the associated problems that go with that.

Acoustic vents

Our range of acoustic vents allows for high-quality sound to be achieved on a sealed product. Whether it is a simple beeping/buzzer on your device used in a dirty environment or the need for voice communications – may be a handheld radio or recording device. At Selectronix Onboard Ltd our acoustic vents prevent dirt/dust/water from entering your product, yet achieving a high-quality audio sound with minimal dB loss. Our vents come in standard sizes, typically round patches, but often for acoustic applications, a custom shape vent is needed. No problem - just speak to us.

Information about installing and positioning a vent An adhesive patch vent’s function is to allow airflow, to allow pressure to equalise with the outside world. It can also deal with condensation build-up. The vent should be installed in areas where condensation is known to be a problem, or specifically closer to a heat source. The vent should be positioned where water or debris will not sit on the membrane itself, creating a ‘pool’ or 'well' effect. Instead, the vent should be placed where any water droplets can drain away immediately. So the underside of a product or a vertical wall is best. The surface area where the vent will be installed should be smooth, even slight ridges or uneven paint finishes can create valleys where the adhesive may not fully adhere to the surface. For small volume applications and vent can be installed by hand. The surface should be treated with alcohol to ensure any contaminants or grease is cleaned away. The vent once position should be pressed down evenly with a gloved hand on only the adhesive area, trying to avoid the central breathing area. A finger should press here two to three times around. Once positioned the vent should be left for 24 hours for the adhesive to fully cure before subjecting it to tests. Don’t be tempted to pick at the vent to see if it has stuck to the surface! It is also at this point worth noting that vents have a shelf life. They can only retain their adhesive strength for a given period. The vents will last longer if they are stored correctly. That is; keeping them out of direct sunlight, keeping them in a sealed container at ambient room temperature. Check with us for more detail about the particular vent that interests you.

In some instances it might be wise to make a small recess on your device wall to aid the installation of the vent, however, for smaller volume users this might restrict the exact size of vent you can use. If your recess, for example, is 9mm and you normally use an 8mm OD vent, if there is no stock of the 8mm vent you won’t be able to use any larger sized vents if you had a sudden surge in demand.

How many vents do I need?

This is a very common question and there is no simple answer. Electronics Onboard Ltd will help talk you through this process, discussing the purpose of the vent, the environment it will be used in. The cubic volume and temperature change are the main focus point. We need to allow for sufficient airflow over a given period of time for the vent to equalise the pressure. For example, if the vent was being used on a fighter jet going up into the sky, the change in pressure will be rather rapid! It may be that a number of vents are required on a product, with varying levels of waterproof protection. We will talk to you about how to ensure the membrane vent is protected. We can help with calculations of cubic area and temperature change in your device, look at the surface area through which you will be venting and thus what size of vent you require as we know the airflow rate of that material. The team at Selectronix Onboard are here to assist you - use us!

Which adhesive should I use?

There are basically two main types of adhesive used on vents – Acrylic or Silicon-based. Acrylic is more common, used for general applications. A vent only requires a very small surface area of adhesive to adhere to your device. Even acrylic adhesive is incredibly strong. Silicon adhesives tend to be used in high-temperature environments (100Deg +), or if a high peel strength is required, if the surface area where the vent will be installed is not flat but instead has a slight curve, then a higher strength adhesive might be required to ensure a strong bond is achieved. Silicon adhesive is often the default type for automotive applications. If the area is not completely smooth, there are things we can do to ensure a reliable bond is made, like enlarging the adhesive area or manufacturing a custom extra thick adhesive layer. Talk to us! +44 (0) 118 9817387

M12 and M6 Plastic or Metal Vents

In some instances, a greater level of protection is required and you may decide to install a screw in M12 vent, or perhaps a 'push-fit' vent. It may be you prefer to make this item serviceable, so it can be swapped out over a given period of time due to the extreme environment of your application. In these instance and many others, a plastic screw-in vent is common. They are available with varying membrane types - with differing airflow rates. Speak to the team at Selectronix Onboard Ltd about the choices of external vent you have.

Documents

IP68 5Pole Cbl Male

IP68 5Pole Cbl Male

Catalogue

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Adhesive vent patch data sheet

Adhesive vent patch data sheet

Catalogue

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4 Documents

Social Media

Contact Us

Selectronix Onboard Ltd

  • Minerva House
  • Calleva Park
  • Aldermaston
  • Reading
  • RG7 8NE

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