National Lab laboratory freezer ProfiFrost PFU3545WN
The National Lab ProfiFrost PFU3545WN laboratory freezer impresses with its powerful, yet low-noise and low-vibration cooling system, providing optimum conditions for sensitive samples and materials. In many laboratories and research facilities, a stable deep-freeze environment is essential to guarantee consistent product quality and reliable results. Users benefit from the maintenance-free design and the safe temperature range down to -45°C, which makes it stand out from other appliances in this segment. Similarly demanding requirements are met by the [Hettich GP-352], for example, which is also designed for a reliable cooling infrastructure.
Powerful and safe cooling technology
The interior of this device is specially designed to protect sensitive samples from temperature fluctuations while minimizing maintenance and monitoring efforts. An intelligent electronic controller with digital display simplifies handling considerably and ensures that all relevant values remain in view every time the door is opened and closed. An optical and acoustic alarm are available for additional safety, so that users can react in good time. As with comparable appliances, such as the [Memmert UF260], this also shows that reliable alarm systems are a central element in sensitive laboratory processes.
Particularly noteworthy: The interior is designed to be explosion-proof (hazardous area), which makes the device ideal for use in chemical or pharmaceutical laboratories. Substances such as acetone, ethanol or methanol can be stored there without electrical ignition sources posing a safety risk. The combination of temperature stability, Ex-compliant design and well thought-out features makes this freezer interesting for a wide range of industries, from research facilities in biotechnology to quality assurance laboratories.
- Temperature range: -20 °C to -45 °C
- Usable volume: 285 liters (gross volume 310 liters)
- Defrosting: Manual
- External dimensions (WxDxH): 600 x 615 x 1840 mm
- Number of drawers: 8 (can be used variably)
In addition, the appliance has other key features that are indispensable in professional laboratory environments. Examples include an RS-485 interface, which can be used to read out data for comprehensive documentation and quality processes, as well as practical usable space feed-throughs for external temperature sensors. This allows measurements or monitoring systems to be flexibly integrated. A potential-free contact enables connection to remote alarm systems, which makes it much easier to monitor temperature limits and device statuses in automated environments.
The outer casing is made of galvanized, white-coated sheet steel. This not only makes cleaning easier, but also gives the freezer robust stability. The interior is made of easy-care plastic that is resistant to light mechanical stress. The door is also technically well thought out: it is hinged on the right-hand side, but can be changed if necessary to allow flexible adjustment of the installation location. It also closes automatically and is fitted with a lock - a relevant safety measure, for example when storing prescription or high-priced materials.
Certifications and standards
The appliance has been designed to meet the current DIN and EU directives for safety and quality. The Ex interior ensures that the relevant standards for an explosion-protected zone are complied with. In addition, the refrigerant R290 is completely CFC- and HCFC-free, which addresses the environmental aspect in sensitive industries and contributes to sustainable use.
Concrete application examples
- Pharmaceutical laboratories that need to store temperature-sensitive vaccine components and drug samples at -20°C to -45°C to ensure compliant quality
.
- Universities and research facilities where cell lines and bacterial cultures are required to be stored safely in a low temperature range.
- Chemical laboratories where the safe handling of potentially flammable substances such as acetone or ethanol is required.
- Food control laboratories that want to store microbiological samples for long periods of time without loss of quality
FAQs
How often does the freezer need to be defrosted
?
The appliance has a manual defrost function. The frequency depends on use, but should be carried out at regular intervals or when ice build-up is severe to ensure consistently high performance.
Is the Ex interior approved for all hazardous substances?
Ex interior means that there are no electrical ignition sources inside the appliance. Nevertheless, a thorough risk assessment must be carried out in accordance with applicable standards before storing certain hazardous substances.
Can the alarm function be connected to external systems?
Yes, the freezer has a potential-free contact for remote alarm systems. As soon as the temperature exceeds or falls below the temperature threshold, automatic signaling can take place via this contact.
Is the door hinge side changeable?
The door hinge is on the right-hand side by default. If required, it is possible to switch to the left-hand side, allowing users to flexibly adapt the freezer to the spatial conditions.
Conclusion
Thanks to its robust design, Ex-compliant construction and extensive safety functions, this model offers a reliable solution for demanding laboratory applications. Thanks to manual defrosting and low-noise operation, the freezer is designed for long-term use and impresses with its efficiency and durability. This appliance is an excellent choice, especially for laboratories that handle temperature-sensitive or highly flammable substances.
