Canaday P G, Fay F S
J Appl Physiol. 1976 Feb;40(2):243-6. doi: 10.1152/jappl.1976.40.2.243.
The principles of operation, design, and performance of a differential photooptical transducer of very high sensitivity are described. Useful range is 10-2,000 mugf with sufficiently low drift to allow recordings of contractile responses of isolated single smooth muscle cells. Comparison with several previous designs is presented.