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Liebherr refrigerator for laboratories and research

Constant temperatures are essential when storing sensitive substances. This especially applies to work in laboratories, where even the slightest deviations can jeopardise the quality of research results. This is why Liebherr has developed new refrigerators and freezers specifically for this sector, combining maximum refrigeration performance with optimum temperature stability. Innovative safety features with monitoring and alarm functions offer all-round protection from all kinds of incident and malfunction. The next generation of appliances also set new standards in terms of energy efficiency and total cost of ownership. On the next few pages we present the latest results of research and development by the refrigeration specialists at Liebherr and show how they can benefit safety in your laboratory.

Product features

• Min./max. temperature log
The min./max. temperature log stores the minimum and maximum interior temperatures and shows on the display whether the storage temperatures were within the tolerance limits.

• +2 °C SafetyDevice
If the temperature falls below +2 °C due to a malfunction, the SafetyDevice takes control, stabilising the temperature, activating the alarm and protecting the contents from freezing

• Power failure alarm
When mains power return the device gives a visual and audible warning signal.

• LightAlarm
In the event of an uncontrolled temperature rise or other problems, the interior light of the appliance starts flashing. This visually shows when action is needed.

• Feedthrough for external sensors
An integrated opening allows a separate sensor to be connected for additional temperature monitoring without having to drill holes or break the door seal.
• Mechanical lock
Liebherr professional appliances are equipped with a mechanical lock and two keys. This ensures that unauthorised persons cannot access your valuable and sensitive stored goods.

• SmartMonitoring (optional)
The cloud-based digital solution continuously monitors and documents temperatures and alerts you immediately via email, text message or phone if any deviations occur.

• WiFi/LAN interface (optional)
The WiFi/LAN interface enables you to easily connect your appliances with Liebherr SmartMonitoring or existing local systems.

• Easy-to-clean interior
The inner liner made of fully recyclable, robust and odourless polystyrene is manufactured in one piece without joints. This makes it quick and easy to clean the large, rounded corners.

• Replaceable door seal
Save time and money: the insertable Liebherr door seals are easy to change. If a seal is damaged, you can replace it yourself without any tools. Contact Liebherr Customer Service to purchase replacements.

• Self-closing door < 90°
To make loading, unloading and cleaning easier, the appliance door stays open if opened by more than 90°. If the opening angle is less than 90°, it closes automatically for safety

• ±3 °C temperature stability
Temperature fluctuations must be minimal to ensure that the quality of sensitive substances is preserved. Liebherr Laboratory refrigerators have an impressive maximum deviation of just ±3 °C from the set temperature. This not only maintains the storage climate, but also the value of your stored goods.

• Standard compliance
The devices fully comply with the DIN 13277 standard and the IEC 61010-2-011 standard.

The MediLine range appliances are equipped with many features to guarantee the safety of stored products and temperature stability in the interior. High-quality materials and precise workmanship, extremely efficient refrigeration components as well as documentation and alarm functions ensure optimum storage of sensitive samples, chemicals and research materials.
• Integrated digital controller.
The intuitive controller with integrated real-time clock allows the temperature to be set to 1/10°C accuracy. The large display allows improved temperature visibility at a glance. The keyboard is dirt resistant and easy to clean – to meet the most stringent hygiene requirements in the laboratory.
• Integrated alarm systems.
A visual and audible door alarm alerts the user to temperature deviations. An alarm is also raised if the door is open for longer than one minute or in the event of power failure.
• Integrated data memory.
The min/max temperature memory function stores the values for up to 41 days. In addition the alarm memory function records the last 3 alarm conditions with alarm type, date and time, duration and maximum temperature.
• Accurate 1-point calibration.
The digital controller includes a calibration function for extremely accurate temperature control and display. This permits compensation between the set temperature and the actual internal temperature. Positive or negative changes to the correction value can be made in steps of 0.1 K.
• Mains-independent power supply of the electronic controller.
In case of power failure, the electronic controller is powered by a battery. The memory continues to log the internal temperature for another 72 hours. If external alarm and monitoring systems have been connected, then data transfer to these is also maintained.
• External temperature sensor.
The laboratory appliances have an access port (diameter 7.0 mm) in the appliance ceiling which allows a temperature sensor to be positioned in the interior.
• External temperature and alarm documentation.
The laboratory appliances are equipped with a volt-free contact for alarm forwarding to an external remote warning system. In addition the appliances have an RS 485 interface which enables as many as 20 appliances to be networked with a central monitoring and alarm system.
• Maximum temperature consistency.
Maximum temperature stability in the interior is ensured by the dynamic cooling system with double ventilation. Very short defrost cycles allow the internal temperature to be kept almost constant during the defrost phases. All laboratory appliances are designed according to the EN 60068-3 standard with regard to maximum temperature stability and consistency.
• Energy-effi cient hot-gas defrost system/
No temperature spikes. Defrost less often and faster: the controller calculates the optimum defrost cycles based on the compressor run-time. Then the fridges defrost in just 8 minutes and the freezers in just 12 minutes. The internal temperature is slightly lowered shortly before so it remains almost constant during the defrost cycle.
• Heavy-duty professional stable door.
Quick access, minimal cold loss, maintaining of product quality. Half-door appliances are ideal particularly with the frequent door opening which occurs in the pharmaceutical industry or the laboratory. Samples and compounds used more frequently are stored in the upper area for quick access while below there is plenty of space for materials and raw materials which are needed less frequently. Thanks to the stable doors with their self-closing mechanism, only a small amount of cold air escapes on opening and this helps to maintain temperature stability and therefore the quality of the goods stored over the long term.

Liebherr provides laboratory fridges with analogue controls and spark-free interior.
• Certifi ed according to ATEX.
The LKexv models are labelled clearly and permanently on the outer housing in accordance with the ATEX Directive 2014/34/EU, including information for cleaning. Rated as II 3G Ex nA II T6, these appliances are suitable for storing explosive and highly fl ammable substances in sealed containers.
• Hygienic interior for versatile use.
The commercial-grade moulded polystyrol inner liner is exceptionally easy to clean and enables optimum hygiene. The moulded trayslides prevent the glass shelves from tipping and allow them to be varied in height.
• Glass shelves.
The glass shelves ensure secure storage even for small items and have a loading capacity of up to 40 kg.
• Water tray.
The defrost water drain in the laboratory appliances with spark-free interior is sealed for compliance with the ATEX Directive 2014/34/EU. The defrost water obtained during the automatic defrost cycle is collected in a tray which has to be emptied manually at regular intervals.
• Convenient opening of the door requiring little force: The ergonomically designed lever handle enables smooth opening of the door with less shaking of the appliance.
• The moulded polystyrol inner liner with large corner radii is exceptionally easy to clean and enables optimum hygiene.
• The sturdy glass shelves are easily adjustable in height and can conveniently be removed at a door opening angle of 90 °. They ensure secure storage and have a loading capacity of up to 40 kg. Sealed defrost water drain in the laboratory appliances with spark-free interior for compliance with the ATEX Directive 2014/34/EU.
• The integrated lock is exceedingly sturdy and protects the stored products against unauthorised access.
• Reversible door hinges in the LKexv models enable individual adaption to space conditions. The door seals can also be easily replaced as required.

Liebherr provides fridges with spark-free interior especially for storing explosive and highly flammable substances in labs and in the chemical industry. The inner liners meet the safety requirements of the EU Directive 2014/34/EU (ATEX) and have been tested according to the EN 1127-1, IEC 60079-0 and IEC 60079-15 standards by elecosuisse –SEV (Swiss Association for Electrical Engineering, Power and Information Technologies), an approved ATEX conformity evaluation organisation.
• Certified according to ATEX.
All appliances with spark-free interior are tested according to the 2014/34/EU (ATEX) Directive. Rated as II 3G Ex nA II T6, these appliances are suitable for storing explosive and highly flammable substances in sealed containers.
• The electronic controller.
The precise electronic controller with digital temperature display enables temperatures to be set accurately to 1/10°C. Symbols indicate the operating status of the appliance. The electronic controller is flush-mounted and equipped with a membrane keyboard for perfect hygiene. The large display allows improved temperature visibility at a glance.
• Accurate 1-point calibration.
The laboratory appliances with electronic controls have a 1-point calibration function for accurate temperature control. This permits compensation between the set temperature and the actual internal temperature. Positive or negative changes to the correction value can be made in steps of 0.1 K.
• External temperature and alarm documentation.
The laboratory appliances are equipped with a volt-free contact for alarm forwarding to an external remote warning system, as well as with a serial interface RS 485 which enables central documentation of temperature profiles and alarm events. LTM monitoring software is optionally available.
• Integrated alarm systems.
Visual and audible alarm systems alert the user to undesired temperature deviations or when the door is open. All alarm parameters can be individually set. For example, the dooropen alarm delay can be adjusted between 1 and 5 minutes. Furthermore, the laboratory appliances with electronic controls have a visual power failure alarm and a sensor defect alarm.
• Integrated data memory.
The electronic controller is equipped with an integrated data memory which logs the maximum and minimum internal temperatures as well as the last three temperature alarms and power failures, together with the time, date and duration. These data can be read out on the display.
• Maximum temperature consistency.
Maximum temperature stability is ensured by the cooling systems of the laboratory fridges and freezers in conjunction with the electronic controller. The fridges are equipped with a safety thermostat to prevent temperatures below +2°C in case of a fault. All laboratory appliances with electronic controls are designed according to the EN 60068-3 standard with regard to maximum temperature stability and consistency.
• Sturdy glass shelves.
The sturdy glass shelves are easily adjustable in height and can conveniently be removed at a door opening angle of 90 °. They ensure secure positioning of the refrigerated or frozen products and have a loading capacity of up to 40 kg in the refrigerator compartment and up to 24 kg in the freezer compartment.
• External temperature sensor.
The laboratory appliances with electronic controls have an access port (diameter 10 mm) on the rear which allows the temperature sensor to be positioned in the interior.

Liebherr provides freezers with spark-free interior especially for storing explosive and highly flammable substances in labs and in the chemical industry. The inner liners meet the safety requirements of the EU Directive 2014/34/EU (ATEX) and have been tested according to the EN 1127-1, IEC 60079-0 and IEC 60079-15 standards by elecosuisse –SEV (Swiss Association for Electrical Engineering, Power and Information Technologies), an approved ATEX conformity evaluation organisation.
• Certified according to ATEX.
All appliances with spark-free interior are tested according to the 2014/34/EU (ATEX) Directive. Rated as II 3G Ex nA II T6, these appliances are suitable for storing explosive and highly flammable substances in sealed containers.
• The electronic controller.
The precise electronic controller with digital temperature display enables temperatures to be set accurately to 1/10°C. Symbols indicate the operating status of the appliance. The electronic controller is flush-mounted and equipped with a membrane keyboard for perfect hygiene. The large display allows improved temperature visibility at a glance.
• Accurate 1-point calibration.
The laboratory appliances with electronic controls have a 1-point calibration function for accurate temperature control. This permits compensation between the set temperature and the actual internal temperature. Positive or negative changes to the correction value can be made in steps of 0.1 K.
• External temperature and alarm documentation.
The laboratory appliances are equipped with a volt-free contact for alarm forwarding to an external remote warning system, as well as with a serial interface RS 485 which enables central documentation of temperature profiles and alarm events. LTM monitoring software is optionally available.
• Integrated alarm systems.
Visual and audible alarm systems alert the user to undesired temperature deviations or when the door is open. All alarm parameters can be individually set. For example, the dooropen alarm delay can be adjusted between 1 and 5 minutes. Furthermore, the laboratory appliances with electronic controls have a visual power failure alarm and a sensor defect alarm.
• Integrated data memory.
The electronic controller is equipped with an integrated data memory which logs the maximum and minimum internal temperatures as well as the last three temperature alarms and power failures, together with the time, date and duration. These data can be read out on the display.
• Maximum temperature consistency.
Maximum temperature stability is ensured by the cooling systems of the laboratory fridges and freezers in conjunction with the electronic controller. The fridges are equipped with a safety thermostat to prevent temperatures below +2°C in case of a fault. All laboratory appliances with electronic controls are designed according to the EN 60068-3 standard with regard to maximum temperature stability and consistency.
• Sturdy glass shelves.
The sturdy glass shelves are easily adjustable in height and can conveniently be removed at a door opening angle of 90 °. They ensure secure positioning of the refrigerated or frozen products and have a loading capacity of up to 40 kg in the refrigerator compartment and up to 24 kg in the freezer compartment.
• External temperature sensor.
The laboratory appliances with electronic controls have an access port (diameter 10 mm) on the rear which allows the temperature sensor to be positioned in the interior.