Can I use the Track-to-Track Coupler to connect a Vernier track to a Pasco track?

No. The distance between the side groove in the track to the top surface is different between the Vernier and Pasco tracks, so even though the Track-to-Track Coupler will connect a Vernier track to a Pasco track, the cart will have to cross a drop as it crosses the seam. This produces poor data and is not recommended. When used with two Vernier tracks, the seam causes no hiccup in the position data.

Track-to-Track Coupler, order code T2T-VDS, $30