LimsPulse
General lab & storage

Refrigerator / deep freezer

Pharmaceutical-grade cold storage for reference standards, reagents, culture media, samples and temperature-sensitive products, typically at 2–8 °C (refrigerator), −20 °C (freezer) or −80 °C (ultra-low).

  • Pharmaceutical
  • Biotech
  • Hospitals & blood banks
  • Clinical research
  • Food testing
Photo of a Refrigerator / deep freezer
Photo: Magnus Manske, CC BY-SA 3.0 (cropped), via Wikimedia Commons
LEARN & PRACTICE

Test your Fridge / freezer knowledge

Multiple-choice questions

Pick an answer to see whether you are right and why.

  1. Q1. What is the usual storage range for a pharmaceutical refrigerator?

    basic

  2. Q2. Which position in a refrigerator is usually the least stable and should be avoided for critical material?

    basic

  3. Q3. Why is a domestic fridge not suitable for storing reference standards?

    intermediate

  4. Q4. Mapping loggers give means of 4.8, 5.1, 4.2, 5.6, 4.5, 5.0, 6.1, 4.6 and 5.3 °C. What is the overall mean?

    intermediate

  5. Q5. Which storage unit should be used for flammable solvents that must be kept cold?

    intermediate

  6. Q6. What does mean kinetic temperature (MKT) express?

    advanced

Viva questions

Think of your answer first, then open it to compare.

  1. 1. What do you check every day on a QC refrigerator?

    Current, minimum and maximum temperature (or the electronic record), that the alarm is active, that the door closes and seals, and that the log is signed. Any reading outside range is raised as a deviation.

  2. 2. Why is a monitoring probe often placed in a bottle of glycol?

    Glycol buffers the probe so it reflects the temperature of stored product rather than brief air spikes during door openings. This reduces nuisance alarms while still detecting real excursions.

  3. 3. A reference standard was found at 12 °C for 3 hours in a 2–8 °C fridge. What do you do?

    Quarantine the material, record the excursion's size and duration, raise a deviation, and check the supplier's stability data or certificate for allowed excursions. Use or discard the standard according to that assessment and fix the cause of the excursion.

In LimsPulse · Calibration Management

Keep every Fridge / freezer in control: usage logs, calibration and maintenance schedules, and automatic blocking of overdue instruments.

See how