PISCO was designed to be used with a wide range of detectors. With the atmosphere, the detector qualities mainly condition the performances of the image restoration process. A good knowledge of the limitations of the detector is essential in order to elaborate a strategy of observation and obtain valid measurements. Here we describe the detectors that we have already tested on PISCO. For a wider information about the detectors used in the field of optical speckle interferometry, see review in Cuby (1988), Richard et al., (1990) and Cuby et al., (1990).