Indefinitely. Historical data needs to be manually cleared/deleted by the user from the device. However, if utilizing the TurfPro Cloud analytics system, after an upload of data, the data is cleared from the app and saved indefinitely in your cloud account.
Yes, push the tines into the turf/soil and have the stainless steel base plate firmly in contact with the turf or soil surface.
The outside of the POGO can come into contact with wet grass and is fairly water resistant overall. However, do not submerge in water above the sensor area.
All three POGO models are warranted to be free from defects for 2 years.