Does anyone know how to sense & measure fluid levels (typical 5 microliters) in a microtiter plate?

Answer 1

well hopefully you used a pipet to get the fluid in the plate so it was measured effectively as for sensing it i think that's too little for most plate readers

Answer 2

Are you trying to measure the turbidity of each well, like a growth curve or a killing curve? If you're trying to read the optical density, you'll have to use a microtiter plate reader, which is pretty much a spectrophotometer made for 96-well plates. I'm not sure if 5 microliters is enough volume though....it would depend on the sensitivity of the reader.