MONITORING DEVICE FOR ADJUSTING LIGHT IRRADIATION IN PARTICLE ANALYSIS APPARATUS

A monitoring device for adjusting a light irradiation in a particle analysis apparatus comprising a flow cell for flow a sample liquid containing particles; an optical device for projecting an irradiation light on the flow cell, receiving the light and outputting a light-reception signal; and a control part for processing the light-reception signal and analyzing the particles, the monitoring device comprising a control part for monitoring, wherein the control part for monitoring comprises: a first data processing part that generates a first indication value indicating the intensity of the light-reception signal obtained from the particle analysis apparatus, as an indication value that changes according to the relative position between the flow cell and the optical axis of the irradiation light in the particle analysis apparatus; a second data processing part that generates a second indication value indicating the intensity of the light-reception signal, which is different from the first indication value, as an indication value that changes according to the gain adjustment of the light-reception signal in the particle analysis apparatus; and an indication value output part that outputs the first indication value and the second indication value on a display device.