PURPOSE: To provide the photosensitive planographic printing plate processor for detecting shortage of feed water to a processing tank.
CONSTITUTION: In a developing part 14, one end of a piping 58 is opened toward the lower part, and from its piping, water which becomes developing water is supplied. In the lower part of the opening of this piping, a pair of electrodes 152 of a feed water detecting device 150 are supported by a holder 154. A pair of electrodes 152 are connected to a controller which is not shown in the figure, by a wiring. Between a pair of electrodes 152, water discharged from the piping becomes like a water column and passes through, and when the water of a set quantity is discharged from the piping, an outside peripheral part of the water column comes into contact with each of a pair of electrodes 152, and the part between a pair of electrodes 152 becomes a conducting state. Also, when the feed water quantity decreases, since the water column becomes thin, water is separated from at least one of a pair of electrodes 152, and the part between a pair of electrodes 152 becomes a non-conducting state, and the controller detects it as shortage of the feed water quantity.
ENDO MIYUKI
YAMAMOTO HIDETO
