Could you draw up a list of recommended spare parts for 1 year operation?

Generally there are no spare parts needed. Everything is included in the instrument and does not require any replacement (if there has not been any severe mechanical damage to the instrument). There are only a few cheap consumable items – dust filters (petrol filters available at the manufacturer or petrol stations) and plastic tubing needed for the field survey. Using dust filters to avoid sucking in dust particles into the analytical units is highly recommended and significantly extends the servicing time of the instrument.