It is not enough to have paper logs and a thermometer in the back of the trailer.  It is also not enough to take temperature readings from the reefer.  Ideally, customers want to know that their pallet of lettuce did not get too cold or too hot.  Pallet level temperature monitoring and/or permanent multi-zone measuring is possible. SmartTemp° communicates temperature based on jobs sent by a smart device or SensorSwarm Host.  Was the pallet loaded warm?  With in-pallet level monitoring, you have proof for pennies a day.  

Be alerted only when a food type being monitored reaches a threshold for a defined period of time. Other devices average and others alert when an approach temperature is met and then again when a critical temperature is met.   Regulations want you to prove that the cargo was not above or below for more than a specific period of time.  SwarmTemp° can be a permanent multi-zone trailer data logger or as a pallet level data logger reporting the duration of time over limits.