Upright –20 °C Laboratory Freezer with Drawers

What is the Upright –20 °C Laboratory Freezer with Drawers?

A floor-standing –20 °C freezer of roughly 250–600 L with several drawers or shelves. It is a general-purpose choice for reagent, enzyme, media and sample storage in research, teaching and quality control laboratories.

Overview

The upright laboratory freezer combines an insulated cabinet of 250–600 L with three to seven drawers or shelves for easy access at eye level. Evaporator plates fitted behind each shelf provide static cooling with good temperature stability, and most models use manual defrost. The compressor is at the bottom, with the condenser at the rear or side. A microprocessor controller sets temperature between –10 and –25 °C and drives alarms for over-temperature, door ajar and sensor failure. Doors are foam-insulated, with magnetic gaskets and a lock. Some versions have a heated gasket to reduce sticking. Interior shelves are coated steel or stainless, and adjustable feet level the cabinet. Uniformity is typically within 5 K, which is acceptable for most reagents but should be mapped for regulated storage.

How does it work?

A –20 °C freezer uses a single-stage vapour-compression circuit with hydrocarbon refrigerant such as R600a or R290. The evaporator either lines the compartment as plates, giving static cooling with high stability and manual defrost, or sits behind a panel with a fan, giving forced-air cooling and automatic defrost. Polyurethane foam of 60–80 mm provides insulation, and magnetic gaskets limit air leakage. A microprocessor controller reads a sensor, sets the temperature between –10 and –25 °C and drives alarms. Higher-specification models add an independent alarm probe, battery backup and a data logger. Spark-free models relocate controls outside the compartment for flammable storage. The temperature reached is sufficient to slow chemical degradation and enzyme activity but does not stop them entirely.

What are the key features?

• Three to seven drawers or shelves with evaporator plates for stable cooling
• Microprocessor control from –10 to –25 °C with alarms
• Foam-insulated door with magnetic gasket and lock
• Adjustable feet and coated or stainless interior
• Uniformity typically within 5 K for general storage

What are the technical specifications?

A typical upright –20 °c laboratory freezer with drawers configuration offers temperature range of –10 to –25 °C, net volume of 250–600 L, temperature uniformity of ≤ 5 K, cooling method of Static, evaporator plates, defrost of Manual and drawers/shelves of 3–7. Values are indicative of the product class; the exact figures for each configuration are confirmed on the quotation and the calibration documents supplied with the instrument.

Which applications is it used for?

The Upright –20 °C Laboratory Freezer with Drawers is used in reagent and enzyme storage, culture media and supplements, sample archiving and teaching and research laboratories. Across the wider -20°C Freezers class, laboratories also deploy it for enzyme and reagent storage, diagnostic kit storage and culture media and supplements.

Which standards and certifications apply?

Relevant standards and methods include IEC 61010-1, IEC 61010-2-011, IEC 61326-1, ISO 15189, NFPA 45 and ISO 9001. Certification candidates for this model are CE and ISO 9001 manufacturing; each is to be confirmed for the specific configuration before shipment, and certificates are supplied only where they have been issued.

Place the freezer on a level floor with clearance for ventilation as specified, away from heat and sunlight, and allow it to run for several hours before loading. Avoid overloading and block-free airflow in fan-assisted models. Defrost static units when frost reaches about 5 mm, and clean the condenser every few months. Calibrate probes and alarms at least annually, and map temperature where storage is regulated. Keep an emergency plan for power failure, including backup freezer space or a generator-backed circuit. Do not store flammable liquids unless the unit is specifically built for it.

How do I select the right Upright –20 °C Laboratory Freezer with Drawers?

Select the upright freezer for general –20 °C storage of 250–600 L with easy access. Specify volume, drawer count, defrost method, alarm set and data output. If you need tighter uniformity or automatic defrost, consider the frost-free variant or a biomedical model with mapping data.

How does it compare with other -20°C Freezers variants?

Choose by what is stored and how it tolerates temperature change. Enzymes and sensitive reagents favour static, manual-defrost cabinets, while general chemicals and media suit frost-free models. Regulated kits and calibrators need independent alarms and logging. Flammable materials require spark-free or explosion-proof designs. Then select capacity, from 100 L undercounter to 600 L upright, and compare temperature uniformity, recovery, drawer layout and lock. Check ambient range, electrical supply and noise. Consider whether –20 °C is sufficient, because many biological samples, nucleic acids and tissues are kept at –80 °C for long-term stability, and some vaccines need different storage.