Low Temperature Chest and Upright Freezers, GFL

GFL deep freezers are equipped with both microprocessor technique and an interface module for monitoring and data recording via PC. RS 422 and RS 485 are optionally available as another two transmission formats.
GFL deep freezers are manufactured using only high-quality, stringently tested materials that are particularly suitable for ultra-low temperatures. The units are extremely quiet, have been approved with the CE mark and are maintenance-free.
The GFL deep freezer program includes chest and upright freezers with capacities ranging from 30 to 500 liters volume. There are 12 chest freezers with six different volumes, respectively, four Upright Freezers having tow different storage volumes. Both of these products are designed for temperatures of 0°C to -40°C, or -50°C to -85°C in an ambient temperature of up to 28°C: 12 deep freezers with 6 and 6 freezer cabinets and 3 differently sized usage areas (after removing the cover, the under counter deep freezers 6441 and 6481 offers the possibility to store freezing goods directly at the work place. Temperature ranges: 0°C to -40°C and -50°C to -85°C, volume of usage space: 96 litres, 3 drawers with castors).
Microprocessor-controlled temperature regulation
The microprocessor-controlled temperature regulator, with digital display of actual and set temperature values and digital setting for specified values, operates maintenance-free and is shock resistant. The regulator is battery-buffered by a constantly charged NC battery that maintains the display of the actual temperature and the alarm functions for 60 hours in case of a power failure. During operation on the line the battery level and the set temperature can be checked by touch control.
Energy saving deep freezers
In compliance with the German Accident Prevention Regulations (UVV). The maintenance-free cooling unit, equipped with fully hermetically sealed high-performance compressors and an air-cooled condenser, ensures short cooling times. Non-flammable refrigerant. The all-around insulation comprises an up to 150 mm thick, seamless and diffusion-protected foamed-in polyurethane layer. This insulation is an essential precondition for energysaving operation. The quietly running compressors only give off around 400 W of heat to the environment at maximum cooling temperature.
Ex-proof inside cabinets
The inside cabinets are manufactured completely of stainless steel (material No. 1.4301), are corrosion resistant and easy to clean. They are free from ignition sources - an extremely important aspect when storing media with low flash points - and are ex-proof in accordance with BG-I 850-0, version 02/2009. The cooling air outlet is located at the front of the unit, meaning that explosive gases cannot be drawn in when the lid or door is opened. The magnetic sealing system reliably prevents freezing of the lid or door seals. All chest lids are balanced and easy to operate.
Chest freezers having a volume of 220 to 500 liters are also equipped with additional insulating cover plates on the cabinet. Upright freezers with storage volumes of 300 and 500 liters are equipped with three inside compartments (H 353 mm), each provided with an insulating door to prevent any loss of cold air. Optional shelves can also be installed in the compartments. On request, the cabinet can also be equipped with a set of drawers instead of the inside compartments.
Controlled access
The lids and doors of the freezer units can be locked, making unauthorised removal of material impossible. The easy-to-use control panel provides controlled access through the use of a key-operated security switch, ruling out any inadvertent temperature maladjustment.
Multiple alarm messages
As standard, the deep freezers come with a potential-free changeover contact for connection to an internal alarm system, or to the central I&C system. They are also provided with a connection for a piezoelectric buzzer for simple remote notification of alarms. In the event of a fault (e.g. excess temperature, under temperature, loss of power, sensor break/short-circuit, etc.), an optical and acoustic alarm is issued. The cause for the fault is shown in the display as a defined code number.
The limit values for alarms (1 – 20 K), for excess and under temperatures can be set individually by the user.
Other optional alarm messages can also be set by the user:

  • Suppression of alarm message after a power failure (0 to 999 minutes); this feature is useful, for example, if emergency backup power systems are tested regularly.
  • Suppression of alarm message on violation of a temperature limit (0 to 999 minutes). The set value remains stored until the next change is made. This can be useful, for example, when large quantities of refrigerated goods are removed/put into storage frequently.
  • Suppression of alarm message on violation of temperature limits (0 to 999 minutes). The set value is cancelled when the set time expires. This can be useful, for example when refrigerated goods are removed/put into storage only occasionally

Powder-coated housing
The housings are made of powder-coated, electrolytically galvanised sheet steel. As a standard, GFL deep freezers come with double wheel swivel castors, two of which can be locked, for transport to the place of use and for mobile applications (castors for under counter deep freezers 6441 and 6481).
Intensive quality assurance
Intensive quality assurance with state-of-the art testing devices ensure trouble-free operation and long life.
Special makes
In addition to a wide range of accessories we also supply customised equipment on request, tailored to the individual requirements of tasks that demand special solutions for storage.


Chest freezers 0 to -40°C

Type

Vol.
l
Useful space W × D × H
mm
Outer dimensions W × D × H
mm
Wght
kg
Connec.
W
Order No.
6341 30500×305×200700×600×905 7060041 11 06341
6340 70600×350×340836×685×105510060041 11 06340
6342100710×440×340960×790×108018060041 11 06342
6343220840×460×5801450×870×104021060041 11 06343
63443001000×500×6001610×910×106024060041 11 06344
63455001440×580×6002060×1000×106031060041 11 06345



Chest freezers -50 to -85°C
TypeVol.
l
Useful space W × D × H
mm
Outer dimensions W × D × H
mm
Wght
kg
Connec.
W
Order No.
6381 30500×305×200700×600×905 90120041 11 06381
(1)6380 70600×350×340836×685×1055120120041 11 06380
6382100710×440×340960×790×1080200120041 11 06382
6383220840×460×5801450×870×1040230120041 11 06383
63843001000×500×6001610×910×1060260120041 11 06384
63855001440×580×6002060×1000×1060330120041 11 06385



Upright freezers 0 to -40°C
TypeVol.
l
Useful space W × D × H
mm
Outer dimensions W × D × H
mm
Wght
kg
Connec.
W
Order No.
64411) 96430×430×510900×770×89014045010 11 06441
6443300600×450×1100990×865×194024060041 11 06443
6445500600×760×1100990×1175×194031060041 11 06445



Upright freezers -50 to -85°C
TypeVol.
l
Useful space W × D × H
mm
Outer dimensions W × D × H
mm
Wght
kg
Connec.
W
Order No.
(2)64811) 96430×430×510900×770×890150 90010 11 06481
6483300600×450×1100990×865×1940270120041 11 06483
(3)6485500600×760×1100990×1175×1940340120041 11 06485



1) Sub-counter deep freezer
Outer dimensions with lock and hinges


Accessories:
Safety cooling systems for chest and upright freezers


CO2/LN2 safety cooling system for 230 V a.c. (emergency power) or for battery operation (the supplied storage battery enables operation for approx. 60 hours). Safety cooling systems protect against non-regulated rises in temperature by keeping the temperature in the cabinet constant at a freely selectable value (0 to -70 °C) by controlled injection of LN2 or CO2 when the main cooling system fails. These systems can be installed in chest freezers with a volume of at least 70 liters and in upright freezers starting at a volume of 300 liters storage space. CO2/LN2 bottles not included.

ArticleTypeOrder No.
LN2 safety cooler for 230 V6946a41 11 06936
LN2 safety cooler for battery operation6946b41 11 06937
(4)CO2 safety cooler for 230 V6947a41 11 06946
CO2 safety cooler for battery operation6947b41 11 06947



Distribution lines for CO2 safety cooling systems

Distribution lines are required of two or three CO2 bottles are connected simultaneously to the freezer unit. The CO2 bottles must be provided with a rising pipe and must not be connected to a pressure limiter. Complete with all materials for assembly and wall mounting. CO2 bottles not included.

ArticleTypeOrder No.
(5)Distribution line for 2 CO2 bottles694841 11 06948
Distribution line for 3 CO2 bottles694941 11 06949



Water cooling system/ice water cooling system

A heat exchanger is installed in place of the air-cooled liquefier. The advantage here is that the heat exchanger considerably reduces the heat given off by the unit to the environment, at the same time, expanding the permissible ambient temperature range in which the unit can be operated. Water supply is regulated by the freezer. Connecting points on unit: screw fitting for presure hoses ½ inch (not included) with coupling nut. A water cooling system can be installed in GFL deep freezers with a volume of at least 220 liters.

Water cooling
Suitable for the connection to a re-cooling system or the fresh water supply.

Ice water cooling
Suitable for the connection to a re-cooling system or the ice water supply.

ArticleTypeOrder No.
Water cooling system696041 11 06960
Ice water cooling system696110 11 06961



Line recorder

For continuous recording of the temperature of the usable space on roll paper. The current measured value is recorded with a constant precision. Designed for continuous operation, with eight selectable paper feeds. Depending on the feed, one paper roll (length 32 m) is sufficient for 2 to 1333 days. For installation in deep freezers with a usable space volume of 500 l (type 6950). When used combined with the other deep freezers, the line recorder is installed in a separate casing (type 6951).

ArticleTypeOrder No.
Line recorder (for installation)695041 11 06950
Line recorder (in a separate housing)695110 11 06951



Temperature data logger

For external monitoring and recording of the temperature of the usable space. The data logger is equipped with a display, a temperature sensor PT1000 with 3 m cable, adjustable limit value monitoring, adjustable recording intervals, and memory space for up to 60,000 measured values. The data is read out directly to a PC via the USB cable comprised in the delivery. A Windows software (German, English, French) for data logger configuration is likewise enclosed.

Calibration of the temperature data logger 6962 at temperature specified by customer, with certificate.

ArticleTypeOrder No.
Temperature data logger696210 11 06962
Calibration of temperature data logger696410 11 06964



Temperature control

For delaying the reaction time of the external sensor in case of temperature change. Aluminium block with several bores for receiving the PT1000 temperature sensor.

ArticleTypeOrder No.
Temperature control696310 11 06963



Qualification data record

Detailed, device-specific record of the spatial and temporal temperature constancy (at a specified temperature). In our premises, the measured data is determined over a calibrated section of measurements and archived for a duration of ten years.

ArticleTypeOrder No.
Qualification data record696541 11 06965



(6) Shelve for upright freezers

Upright freezers having a storage volume of 300 and 500 liters come with three compartments as standard equipment. As an option, each compartment can be sectioned with one additional shelf for optimal utilisation of the internal volume of the unit.

ArticleTypeOrder No.
For upright freezers 300 l695441 11 06954
For upright freezers 500 l695541 11 06955



(7) Set of drawers for upright freezers

The cabinet of upright freezers can also be equipped with a set of four drawers in place of the three insulated compartments. These drawers are made of stainless steel with front panels made of 10 mm thick polystyrene insulating plates. Ball bearings and slide rails ensure easy and level motion.

ArticleTypeOrder No.
For upright freezers 300 l695241 11 06952
For upright freezers 500 l695341 11 06953



(8) Storage system for chest and upright freezers

Optimised utilization of the storage space is achieved using racks for boxes, microtiter and DeepWell plates.
The stainless steel drawers reduce overall weight and are easy to handle. Use of these drawers guarantees well-arranged and safe storage of the entire sample material. The boxes are made of water-resistant coated cardboard. There are three different dividers available for the boxes. The box capacity for storing samples can be varied, permitting the system to be adapted to a variety of applications.


Drawers for boxes
TypeforBox H
mm
Drawers qtyBoxes qty
per drawer
Order No.
6901Chest freezers 70/100 l508/15 641 11 06901
6903Chest freezers 220/300/500 l5018/21/401041 11 06903
6907Upright freezers 300 l5024 941 11 06907
6909Upright freezers 500 l50241541 11 06909
6902Chest freezers 70/100 l758/15 441 11 06902
6904Chest freezers 220/300/500 l7518/21/40 741 11 06904
6908Upright freezers 300 l7524 641 11 06908
6910Upright freezers 500 l75241041 11 06910



(9) Boxes (130 × 130 mm) with 50 mm and 75 mm high for drawers
TypeHeight
mm
for typeOrder No.
6970506901/6903/6907/690941 11 06970
6980756902/6904/6908/691041 11 06980



Inner dividers for boxes with 50 mm and 75 mm height
Typefor jars qtyØ jar
mm
Compartment size
mm
Order No.
69711001112 × 1241 11 06971
6972641415 × 1541 11 06972
6973491617 × 1741 11 06973



Drawers for microtiter and deepwell plates
TypeforDrawers qtyMicrotiter plates qty
per drawer
Deepwell plates qty
per drawer
Order No.
6905Chest freezers 70/100 l12/2018 641 11 06905
6906Chest freezers 220/300/500 l24/30/56301041 11 06906
6911Upright freezers 300 l24361241 11 06911
6912Upright freezers 500 l24722441 11 06912


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