Related:
biosensors are analytical devices that convert a biological response to a different type of signal that we can measure, via transduction. Usually has a biological element as a receptor/recognition site (like antibodies), and a transducer
biochips are physical devices with multiple biosensors, allowing analysis of multiple biological markers at the same time. useful for high-throughput methods for gene expression profiling or protein detection, often using fluorescence for signal detection
lab-on-chip can integrate multiple functions and biochips into a single chip, usually via microfluidics