Question: A realtime clock and memory for 15000 time and date stamped measurements mean everything you are going to need is in this package
Please fix the punctuation.
Fixed: [A real-time clock and memory for 15,000 time and date stamped measurements mean everything you are going to need is in this package.]

Question: But you also need a durable transmission and a robust chassis
Please fix the punctuation.
Fixed: [But you also need a durable transmission and a robust chassis.]

Question: As a separate chapter the Swedish reference method for analysis of hydrocarbons in soil is described
Please fix the punctuation.
Fixed: [As a separate chapter, the Swedish reference method for analysis of hydrocarbons in soil is described.]

Question: There is a semipermeable membrane so the water can enter the to the suguar but the suguar molecules are too large to enter the potatoe
Please fix the punctuation.
Fixed:
[There is a semi-permeable membrane, so the water can enter the to the suguar, but the suguar molecules are too large to enter the potatoe.]