Self-measurement vs outsourcing

Aspect	Self-measurement	Full outsourcing
Physical execution	Your team places and reads loggers	We place, manage and read out
Best for	Known room, internal capacity	Audit pressure, complex room, limited capacity
Evidence level	Depends on dossier choice	Full project with reporting

Renting vs buying loggers

Aspect	Rent	Buy
Investment	Low entry, project-based	Higher purchase plus maintenance
Calibration management	Temporary use with certificates	Own management and recalibration needed
Best for	One-off or periodic studies	Frequent studies with internal expertise

Aspect	Temperature mapping	Continuous monitoring
Purpose	Identify hot and cold spots and sensor position	Routine monitoring of chosen positions
Timing	Initial, periodic or after change	Continuous after qualification
Output	Mapping dossier and advice	Alarms, trend records and follow-up

Aspect	2-8 °C	15-25 °C	ULT -80 °C
Main risk	Freezing, door impact, evaporator	Season, HVAC, dispatch, solar load	Recovery after opening, gradients, alarm response
Typical duration	24 hours to 7 days	Often at least 7 days	24 to 72 hours depending on risk
Examples	Cold room, medicine fridge	GDP warehouse, API storage	Biobank, lab freezer

Audit / QA

QA-led temperature mapping: from self-measurement with calibrated loggers to an audit-ready dossier, without unnecessary complexity.