Refrigerated transport: agreeing temperature requirements and monitoring

A good refrigerated transport enquiry describes what must be preserved during the journey and how this will be verified at handover. 'Food products, keep cold' is not enough to compare offers: the warehouse, carrier and consignee may have different expectations for the same trip.

Ask the shipper or manufacturer for written requirements for the specific product: permitted range, transit duration limits, condition at dispatch, packaging and co-loading conditions. These details need to be checked against the applicable rules. Assign someone to resolve disputed parameters before the vehicle arrives, for example when the consignee's instructions differ from the supplier's documents.

The unit set point is the target control value. Air sensors show temperatures at particular locations, such as the air supply or return. The product's own temperature is measured separately using a selected method. The UF/IFAS guide distinguishes these parameters; a display number matching the enquiry does not in itself describe the condition of the entire consignment.

It is useful to have separate fields in the enquiry for the unit operating settings, monitored parameter and acceptance criteria. State the units of measurement. If the parties use the word 'temperature' without qualification, discuss a concrete example: which reading does the driver report to the dispatcher and which does the warehouse employee check?

• University of Florida IFAS Extension: Protecting Perishable Foods During Transport by Truck or Rail

Thermo King states that the transport refrigeration unit is designed to maintain the required cargo temperature in transit and that the product should be brought to the necessary condition before loading. Do not plan a trip on the assumption that a standard refrigerated vehicle will quickly cool a warm consignment. Any non-compliance identified before loading must be reported to the person responsible for the cargo.

The manufacturer's guide also requires air circulation around the load to be maintained. Agree packaging and the loading pattern with regard to the air ducts, return airflow and permitted load height in the particular body. Provide photographs of the pallets showing their actual wrapping and dimensions: packaging stability and airflow need to be assessed together, without applying universal clearances from a random diagram.

• Thermo King: Precedent Single Temperature Units — preparation and loading, pages 128–130

For vehicle selection, provide weight, package count and dimensions, route, number of unloading stops and access conditions. Ask for confirmation of a suitable body and unit configuration, vehicle preparation, who is responsible for the settings and the procedure for changing them. For several consignments, provide separate requirements, including co-loading restrictions.

ATP concerns the international carriage of perishable foodstuffs and the special equipment used for it. This does not imply identical obligations for every temperature-sensitive cargo on every route. The agreement's applicability, equipment requirements and documents must be established for the specific shipment; a vehicle certificate does not replace the goods specification or agreement on operations.

• United Nations Treaty Depositary: ATP — Agreement on the International Carriage of Perishable Foodstuffs: status and documents

Agree whether an independent logger, unit data or another monitoring method is needed. For a logger, specify the medium being measured, sensor positions, recording interval, device identifier, start time and method of file transfer. UF/IFAS emphasises the importance of device placement and recording the date, time and installation location.

A practical question for the parties: who supplies the device, checks that it is ready, starts it, retrieves it and reads the data? Separately record whether access is needed during the journey or a report on delivery is enough. Discussing these options in an article does not mean that a specific vehicle already has the selected system: its availability must be confirmed before transport is agreed.

• University of Florida IFAS Extension: Protecting Perishable Foods During Transport by Truck or Rail

For quick-frozen foods, Codex Alimentarius recommends organising handover between warehouse and vehicle to limit warming and taking door-open duration into account. The practical planning lesson is to clarify the loading dock type, consignment readiness and receiving slot in advance. These are organisational recommendations, not a single time standard for every cargo.

In the enquiry, designate contacts for delays or sensor alarms. Define who receives the original readings and checks them. State that the responsible specialist makes the decision on the suitability of a disputed consignment. Record the event time, measurement location and actions taken; make provision for set-point changes under an agreed procedure.

• Codex Alimentarius, FAO/WHO: Code of Practice for the Processing and Handling of Quick Frozen Foods — transport and temperature monitoring

For quick-frozen products, Codex describes staged checks: visual inspection, review of temperature records and further measurements if needed. It is therefore worth discussing acceptance in advance: which documents the warehouse receives, who measures the product and how discrepancies are documented. The mere existence of a temperature chart does not establish the cause of a possible defect.

Keep the trip number, consignment list, cargo handover time, device details and original recording file together. This helps compare the shipper's and consignee's observations. The responsible parties determine how a disputed consignment is accepted and handled under applicable requirements, not on the basis of general advice in an article.

• Codex Alimentarius, FAO/WHO: Code of Practice for the Processing and Handling of Quick Frozen Foods — transport and temperature monitoring

Send the logistics specialist a single message with the route and dates; product name and condition; weight and package dimensions; temperature specification; packaging photographs; co-loading restrictions; and warehouse addresses and time windows. Attach the consignee's monitoring and documentation requirements and identify the people responsible for the cargo at both ends of the route.

Ask for the quote to come back with explicit conditions: what transport includes, how waiting and additional stops are accounted for, and which equipment and evidence of temperature compliance have been agreed. This lets you compare offers for the same job and identify missing information before the vehicle arrives.