Guides
Reading a reefer log without a data scientist
Supply air, return air, pulp temperature: which line on the chart tells you whether your fruit is fine, and which one is noise.
Tomas Verhoeven, Rotterdam
7 min read
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Written by a planner or engineer at one of our hubs. Questions go straight to them through the control tower.
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A reefer log has more lines than most people need. Here is how to read the three that matter.
Supply, return and pulp
Supply air is what the unit blows in. Return air is what comes back after passing the cargo. Pulp temperature is what the fruit actually is. When return and pulp agree, you are fine.
When to worry
A return air reading that climbs for more than two hours while supply stays flat usually means blocked airflow, often from pallets loaded against the doors.
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