Cold-chain freight: difference between revisions
Diff·revision 7 → 8·08:18, 14 Jan 2025
Difference between revision 7 and revision 8 of Cold-chain freight. 10 lines changed; the page grew by 574 bytes.
| Revision 7 — 01:03, 3 Jan 2025 Chromatokid (talk) expand §Monitoring 2,511 bytes +126 | Revision 8 — 08:18, 14 Jan 2025 CostPerMgCory (talk) state that overlay gas is used and name it 3,085 bytes +574 | ||
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| 21 | Active systems maintain temperature by refrigeration and can hold it as long as they are powered. They are used for high-value or long-duration shipments and are uncommon in research-chemical supply.{{r|ich_q1a}} | 21 | Active systems maintain temperature by refrigeration and can hold it as long as they are powered. They are used for high-value or long-duration shipments and are uncommon in research-chemical supply.{{r|ich_q1a}} |
| 22 | 22 | ||
| + | 23 | == Monitoring == | |
| + | 24 | | Device | What it records | | |
| + | 25 | |---|---| | |
| + | 26 | | Single-use threshold indicator | Whether a threshold was crossed | | |
| + | 27 | | Time–temperature indicator | Cumulative exposure above a threshold | | |
| + | 28 | | Electronic data logger | A full temperature profile with timestamps | | |
| + | 29 | | Nothing | Nothing | | |
| + | 30 | ||
| + | 31 | A threshold indicator that has not tripped establishes that a specific threshold was not crossed, which is genuinely informative and is much less than a profile. A logger record is the strongest evidence available and is uncommon outside pharmaceutical distribution.{{r|usp1079}} | |
| + | 32 | ||
| 23 | == References == | 33 | == References == |
| 24 | {{reflist}} | 34 | {{reflist}} |