Liebherr SFTfg 1501 laboratory freezer with a spark-proof interior, 3 plastic drawers, 71 l, 091654851

For those who wish to store flammable chemicals within easy reach and in an organised manner in the laboratory, whilst ensuring there are no ignition sources inside the unit, the Liebherr SFTfg 1501 is an ATEX-compliant laboratory freezer with an ignition-source-free interior. This model, with a net capacity of 71 litres, comes factory-fitted with three plastic drawers; instead of open shelving, this allows stored items to be kept separate and organised by sample, reagent or batch. Like the shelving version, this variant also complies with cleanroom class ISO 7 and GMP class B.

Safety: ignition-source-free interior in accordance with the ATEX Directive

The drawer version also features a non-sparking interior and, according to the type plate, is classified as ‘II 3/-G Ex ec IIC T6 Gc/-’ in accordance with the ATEX Directive 2014/34/EU; the harmonised standards are EN IEC 60079-0:2018 and EN 60079-15:2010. The unit is authorised for the storage of research samples, reagents, laboratory equipment and chemicals such as ethanol, acetone or isopropanol, provided their flash point is above temperature class T6, i.e. above 85 °C. Chemically unstable substances, as well as blood, plasma or other bodily fluids intended for infusion, are expressly excluded from storage. The explosion protection applies exclusively to the interior of the unit: according to the operating instructions, the unit itself is not intended for installation in potentially explosive atmospheres; the installation site must be located outside an Ex zone.

Temperature control and cooling capacity

The static cooling system ensures uniform cooling within the adjustable range of -9 °C to -30 °C, with a temperature gradient of 7.4 °C and a maximum fluctuation of 3.3 °C. Defrosting is carried out manually; the refrigerant used is the natural R 600a with a charge of 60 g. The permissible ambient temperature at the installation site is between +10 °C and +35 °C; annual energy consumption is 180 kWh. With a sound power level of 40 dB(A), the unit is barely noticeable during everyday laboratory use, even when positioned directly within the workspace.

Interior fitted with three plastic drawers

Instead of open shelving, this version features three plastic drawers in which samples, reagents or batches can be stored separately and clearly organised, without having to open the other drawers when removing one. As with the shelving version, the maximum total load capacity is 120 kg. An antimicrobial handle with an opening mechanism makes operation easier even when wearing laboratory gloves; a mechanical lock, including two keys, secures the interior; and the door hinge is on the right-hand side but can be reversed. A 10 mm diameter sensor feed-through allows an external temperature sensor to be inserted, for example for independent temperature monitoring.

Controls, Alarms and Networking

Operation is via a monochrome display with touch buttons. In the event of a fault, the unit issues visual and audible alerts; following a power cut, it automatically alerts the user when power is restored, making an unnoticed interruption to the cold chain less likely. A potential-free contact with a rating of up to 8.0 A at a maximum of 30 V DC is provided for connection to an external building management system or alarm system. Via the SmartModule system, the unit can also be networked via Wi-Fi or LAN; both interfaces can be retrofitted as optional extras and enable centralised recording and documentation of temperature data.

Suitable for cleanrooms in GMP environments

With ISO Class 7 in accordance with ISO EN 14664-1 and GMP Class B, the drawer version of the SFTfg 1501 is also suitable for applications with heightened cleanroom requirements, such as in pharmaceutical quality control or in research areas with corresponding documentation requirements.

Typical areas of application

• Sorted deep-freeze storage of flammable samples and reagents by batch or project
• Chemistry and pharmaceutical laboratories requiring separate storage in individual drawers
• Cleanroom and GMP environments requiring temperature monitoring subject to documentation requirements
• Research facilities requiring frequent access to individual sample stocks

The three drawers make day-to-day work easier, particularly where individual samples or reagents need to be accessed frequently without having to survey the entire interior each time: each drawer can be pulled out independently, whilst the rest of the interior remains cold and sealed.

Design, dimensions and connections

With external dimensions of 59.7 x 60.5 x 81.9 cm (W x D x H) and a net weight of 39 kg (gross 41 kg), the SFTfg 1501 can be permanently installed in the laboratory as a floor-standing unit or freestanding unit. The internal dimensions are 38.0 x 41.0 x 61.0 cm. The housing and door are made of white steel, whilst the inner container is made of white, fully recyclable polystyrene plastic. It is connected to a 220 to 240 V AC supply at 50 Hz with a rated current of 2.0 A; the power cable is at least 3,000 mm long. Liebherr designs the unit for a service life of 15 years.

Technical details

Contents

• 1x Liebherr SFTfg 1501 laboratory freezer (71 l) with 3 plastic drawers
• 2 keys for the mechanical lock
• User manual

Customised requirements & procurement service

Do you require additional accessories for your SFTfg 1501, such as the optional retrofittable Wi-Fi/LAN module or height-adjustable feet, or are you looking for another Liebherr ATEX model? LT Laborhandel will be happy to assist you with procurement and configuration via our procurement service.