An apparatus that comprises an optical-mode-converter. The CDR continuous by measures the temperature and pressure for the down hole sample. The coating station has a spray processing vessel in which a movable spray-head and rotatable wafer holder. In addition, a head bolt fastening portion for receiving a bolt is provided on an outer side portion of the water jacket in the cylinder head, and a rib is provided in a portion of the water jacket that corresponds to the head bolt fastening portion.