MK3 Adaptor

Having created a white bodied sensor, it was time to go for a pure tech one (I guess you could add coal dust to the epoxy resin if you don't like it's semi opaque look). The design is very similar to the Mk2, but instead uses a black Durapipe (push fit plumbing system) T piece. The following photo shows the finished article.

mk2 adaptor - o2 socket

Making the sampling adaptor

To make the above adaptor, you'll need the following bits:-


Maplin Code



'Durapipe' T piece          



market stall

Plastic DIN dust plug



Bristol Channel Diving

19mm grommets (pack of 10, 3 reqd)




Araldite Rapide (2 part epoxy resin)



Cheap Shop




As I was still interested in only push fitting the oxygen sensor, a grommet was again used to provide this facility. However, the internal diameter of the Durapipe fitting (with all of the loose inserts that hold the pipe removed) was a little small for the modified grommet. This had to be reemed out to allow the grommet to be inserted.
The DIN dust plug and sensor grommet were again epoxy'd into place as per Mk2. The exhaust port, this time, was made from the plastic lid of a 35mm film cannister. This fits perfectly well into the other end of the T and is extremely low profile.
Another film cannister was canibalised to create a dust cover for the sensor.

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