Request help identifying equipment

Hi guys,

I was wondering if someone could help me out with the identification of some
equipment.
I have two green boxes, each with filters and hoses and a power socket.
The following buzz words appear on the product(s):
Euro Chemical Control Limited
Devex
Developer Management system
T III

Some images can be viewed at:
http://www.vidguide.com/jon/green

A google search, and some common sense, suggests that these are used for
recycling developer, or other such chemicals. I assume they are
photographically related.

Can anyone tell me for sure, what these products are designed to do, what
the difference is between the smaller and larger unit, and if there a market
for them, as I need the space back in my shed.

Thankyou for any help, and sorry for the little details I have to offer.

 

Devex make Xray film that I know of and so I would guess these maybe
silver recovery units made by them.

 

Having another look they maybe also be replenishment tanks for the dev
and fixer.