Flow indicator

[oiler]

Perhaps of iterest for the thermosiphon guys......

http://cgi.ebay.co.uk/GARDNER-LISTER-PETTER-RN-FOWLER-DORMAN-FLOW-INDICATOR_W0QQitemZ310181570083QQcmdZViewItemQQptZUK_CarsParts_Vehicles_BoatEquipment_Accessories_SM?hash=item4838432623

Oiler

[cognos]

That price is completely out to lunch - unless this is something of historical or collectible interest.

175£ = $307CA = $292USD 

I've seen these rotary flow indicators used on dozens of low-flow sytems, on oil, water, and everything in between. They are common in the oil industry, in many sizes.

Having said that, I have no idea where one would order them from or how much they are. I'll see what I can find out.

In the meantime, here's some here, third from the top - and they're even from India!

http://www.indiamart.com/technoflow/indicator-valves.html