Hyper sensitive levels

[meow2222]

Heat & bend the glass tube, if you dont mind it not working upside down.

NT

[Cursitor Doom]

Nice idea! You're a mine of info, I've noticed. ;-)

[MattyF]

The Auckland Nuclear Accessory Co. Ltd. in New Zealand made a mercury tiltmeter, where the change in capacitance between electrodes and a mercury surface is proportional to the tilt. This tiltmeter can measure a vertical displacement of 0.0002 inches. The city of Auckland was shown to tilt twice a day because of the orbit of the moon.

[dennis]

Did it actually tilt or did they just measure the movement of the CoG of the system?

[Capitol]

Edinburgh (built on granite) actually tilts due to the tidal forces. This could be shown with a reflective galvanometer over half a century ago. Can't remember the details.

[harryagain]

Everywhere South of Watford Gap is sinking into the sea. Oop North is rising. Anther proof thatYorkshire is God's own country.

[Cursitor Doom]

That'll be the weight of all the immigrants.

[docholliday93]

I have a couple of these - the more sensitive one is actually marked '1 division = .05mm in 1m', which doing the calculation works out at about 10 seconds. A sheet of paper under one end sends the bubble practically off scale. The other one gives around .3mm in 1m or around 1 minute for one division. The more sensitive one is practically useless for most tasks, while the other one is ok for trimming things up once you're nearly level.

[meow2222]

I cant imagine what needs to be that level.

NT

[dennis]

My telescope is frequently set that level.

[Cursitor Doom]

Lathes for one thing. If there's the slightest twist in a lathe bed it will turn out work which is tapered when it's supposed to be straight.

[meow2222]

NT