Not every temperature-sensitive product is refrigerated. Some medicines, laboratory samples and biological materials need frozen storage, and some need it much colder than a conventional freezer reaches. The right unit starts with one question: what temperature does the manufacturer specify for the products you’ll store?
What a pharmaceutical freezer is
A pharmaceutical or medical freezer is built for controlled frozen storage in professional settings. Depending on the model, it can include a digital display, high and low alarms, data logging and a lockable door: the control and evidence a household freezer doesn’t provide.
Types of freezer
- Medical freezers for medicines, samples and other products that need frozen storage in a healthcare setting.
- Laboratory freezers for research, testing and sample storage, in a range of capacities and operating ranges.
- Ultra-low temperature freezers for specialised research and biological storage below what ordinary frozen storage provides.
- Spark-safe freezers for workplaces storing volatile or flammable materials. Their construction is designed to reduce ignition risks from electrical components.
- Combination refrigerator-freezers with separate chilled and frozen compartments in one cabinet, useful when floor space is limited.
Common temperature ranges
| Range | Typically used for |
|---|---|
| About −20°C | Conventional frozen storage for selected pharmaceuticals and laboratory materials where this range is specified. |
| About −40°C | Specialised laboratory and healthcare uses that need substantially colder storage. |
| About −80°C | Ultra-low storage for highly specialised research and biological materials. |
| +2°C to +8°C | Not a freezer: vaccines and many medicines are refrigerated, not frozen. Australia’s National Vaccine Storage Guidelines recommend +2°C to +8°C, aiming for +5°C, in a purpose-built vaccine refrigerator. |
These are general ranges. Always follow the storage temperature on the product’s own instructions.
Features to look for
- Accurate control that holds a consistent operating range for the products inside.
- A digital display so staff can check the reading without opening the door.
- High and low alarms, audible and visual, when conditions leave the set range.
- Data logging to record readings over time and verify storage conditions.
- A door lock to prevent unauthorised access and unnecessary openings in shared workplaces.
- Solid construction: good insulation, durable components and a practical internal layout.
How to choose
- Start with the required range. Check the storage instructions for everything you’ll keep in the unit, and let that decide the type of freezer, not size or price.
- Work out capacity. Allow for current stock and growth so the cabinet isn’t overcrowded.
- Measure the space. Include the clearance the manufacturer specifies for ventilation and servicing, door swing and staff access, and the delivery route into the room.
- Check monitoring. Display, alarms, logging and remote alerts where your operation needs them.
- Compare running costs. Freezers run continuously, so energy use matters alongside the price.
- Review warranty and service. After-sales support is important for equipment that never switches off.
Maintenance and monitoring
Follow the manufacturer’s cleaning, inspection and servicing schedule. Keep the interior organised so air can circulate, and don’t load products against vents or past the recommended capacity. Record readings as your procedures require and investigate alarms promptly.
If products experience an excursion, don’t automatically use or discard them. Isolate them, document what happened, and follow the product manufacturer’s instructions or your organisation’s excursion procedure.
Freezers at Kontact
We stock Nuline −40°C freezers (the DW270, DW450 and DW780 upright), HF200, HF400 and HF600 spark-safe freezers, and the HRF400 combination refrigerator/freezer. See them all in medical fridges, freezers and warmers.
Questions
Can different products share one freezer?
Only if their storage requirements match. Check each manufacturer’s instructions before combining products.
Is a bigger freezer always better?
No. The right size depends on stock volume, space, energy use and the manufacturer’s loading guidance.
How should products be arranged?
So air circulates freely and staff can find items quickly without holding the door open.
