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Report - - Solicitor, Preston - 27/10/2008 | UK Draining Forum | 28DaysLater.co.uk

Report - Solicitor, Preston - 27/10/2008


Bigjobs

Official Smartarse
Regular User
Visited with Over

So, dropping over off at home after a weekend of hijinx :p, we called over to pay a visit to the Solicitor drain.

What a lovely little culvert it is too, very old in places, with flowstone all over the place. It's just over half a mile long.

Anyway, here's the pics.

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Towards the end, there's a pipe cover, which we lifted and made our way down. No, i forgot to get a shot of it.

At the end, is a holding tank for shit. (and I'm allowed to say shit here, cos that's exactly what it is)

With a funny sound coming from it, like a very loud bat, but obv not a bat.

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I've taken a video of it, or the sound and uploaded it to youtube, any ideas what it is?

http://uk.youtube.com/watch?v=7dRUyFMDmr4
 

FreshFingers

Choose life, choose tunnels
Regular User
The time period sounds too long for a transducer type sensor. The pulses are normally in the order of sub-ten millisenconds with almost no reflective return within the audiable range.

They don't half hurt when you put a finger on the transducer face though!
 

FreshFingers

Choose life, choose tunnels
Regular User
Crudely put, a Piezo electric transducer uses a disc which flexes under a pulse of current sending a focussed 'beam' of pressure waves out from the face. The sensor circuit can determine the distance from the face using time calc's, hence used for measuring water levels, amongst other things like densities. It's the needle-like jet of pressure that stings a bit.

Think of dolphins and submarines clicking and pinging away :thumb
 

pastybarm

28DL Full Member
28DL Full Member
Yes, I thought it could have been a chain or a flap valve, but it does sound high pitched. Thanks for all the replies.
 

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