An electro-osmotic pump is an unusual and interesting way to pump fluids and also measure their flow rate with only an electric field (no magnets).
Refs (in order of relevance)
https://sci-hub.tw/10.1016/S0039-9140(99)00320-3
http://micromachine.stanford.edu/~dlaser/research_pages/electrokinetics_and_eof.html
https://www3.nd.edu/~changlab/documents/Youcef.pdf
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2756694/
https://psec.uchicago.edu/library/photocathodes/SiO2_OH_model.pdf
https://www.patreon.com/AppliedScience