Looking for guidance.. newbie with no idea!
hi all.. i have just signed up... sorry for not being a regular, however science has never been my strong point!
bare with me as what i'm trying to make probably wont make any sense and weeks of google searching is driving me crazy!
Im trying to move liquid along a strip (picture a immunoassay strip/lateral flow).. that is the simple bit!
however i'm trying to add a area that changes colour once the liquid has reached it ( abit like litmus paper..however this isnt working!) a ph strip wont work as it offers too many colour changes.. i need 2! this isnt the simple bit... and where i need assistance...
i want a one colour change for acidic and one colour for alkaline environments.. i know.. this domain is usually ph strip territory.. however that entails in having a static colour as a display until the liquid is reached! this is the issue im stuck with! i need a white display and then 2 colour changes... is it even possible??
i have attached an image..albeit it could be useless but it gives an insight of what im trying to achieve in terms of the liquid flow and colour change.. *** it wont allow me to attach or add image** sorry
can anyone recommend something?
thank you
Natalie