Biological 30 Liter Dry Storage Freezer  

Desktop Personal Cryo-Freezer DPF30

Based upon our unique LN2 pumping systems, we developed this innovative Desktop -196   Personal Freezing system.

THE DESKTOP -196 PERSONAL FREEZING SYSTEM

 

WHAT IS THE DISTANCE BETWEEN YOU AND YOUR SAMPLES?

From now on your samples are next to your working place

The complete system consists of :

  • A 30L dry storage mini-container
  • A pressureless LN2 reservoir dewar
  • A microdosing LN2 pump

dpf30inter-4-25.GIF (19653 bytes)

DPFcryokoppeling1.GIF (35165 bytes)
 

 

Your samples – your Cryo-freezer

  • -196C dry-storage at your working place?
  • A Cryo-Freezer for each individual user or user group?
  • Added sample safety!
  • Added user safety!
  • Very convenient!

DPFcryokoppeling2.GIF (35144 bytes)

CE / EN50081/ EN50082 approved

The pump is used to convey the LN2 from the reservoir dewar to the cold-transducer in the dry-storage container. In this way the cryogenic temperatures are transduced to the storage area, resulting in a 100% dry place to store your samples in cryogen temperatures of –190C and lower.

The advantages of the Desktop -196 Personal Freezing System are numerous :

  • Your samples in the Personal Cryo-Freezer are guaranteed stored in dry gas at liquid nitrogen temperatures.
  • No cross-contamination possible through LN2.
  • P.E.D. 92/23/EC (Pressure European Directive) for pressurized vessels does not apply for our system. Therefore our system can be used in the lab, near your working place.
  • You can store your own samples in our unit, instead of sharing a large biological LN2 container with others.
  • As the samples are now always near your working place, there is less need to move around the building with samples in small LN2 containers.
  • It is a user-friendly and safe system, as the contact and splashing of liquid nitrogen is eliminated.
  • The unit is easy to transport or to move, due to the wheels under the dewar and container.
  • The temperature uniformity in the dry storage container is in the –190C range, from top to bottom.
  • The dry storage container has a sliding transparent inner cover, to guarantee the above uniformity during lid openings, and easy sample access.
  • The standard LN2 autofill feature assures you of the right volume of LN2 in the cold transducer, at any time.
  • Static evaporation of LN2 is approx. 3L per 24 hours.
  • With the 50L LN2 reservoir Dewar included in the system, you only need to refill the dewar once per week to assure yourself of a proper operation of the system.
  • The cold transducer in the storage container contains 8L of LN2 and therefore keeps the temperature in the storage area in the –190C range for min. 24 hours in case of a power loss or during transport.
  • Set-up time from ambient to –190C range in approx. 20 minutes.
  • The system works without valves (eliminates risk of valves that freeze open).
  • The system has an extra mechanical overfill protection, so in case of failure LN2 will NEVER get into the storage area.
  • The –196 Personal Freezing System is not producing any noise.
  • It does not give off any heat and it uses almost no electrical power.
  • It can also be operated on a 12 Volts car battery and then works for about one week. Ideal for using it for transportation purposes.
  • Liquid stabilizers reduce movement of LN2 in the cold-transducer during transport.
  • There are alarm signals for too high temperature, empty dewar, broken sensors.
  • The system has a remote temperature alarm connection.
  • Easy to clean.

Technical Specifications

Storage container working volume 30 liters, == 1536 x 2ml. vials or 1920 x 1,2 ml.
Storage container size round 36 cm x 27 cm deep
Storage temperature below –190 degrees Celsius
Storage container temperature uniformity +/- 5 degrees from top to bottom (when closed)
Storage container cold-transducer LN2 volume 8 liters LN2, = 3 liters in bottom, 5 liters in wall
Storage container static evaporation rate < 3 liters per day (when closed)
LN2 reservoir dewar capacity 50 liters
Safe working period with full cold-transducer > 48 hours
Safe working period with full reservoir dewar 1 week minimum (16 days when closed)
Setup time from ambient to -190 20 minutes
Setup LN2 required (from ambient to -190) 4 liters LN2 + 8 liters LN2 for cold-transducer
Power connection 115V / 230V AC with supplied power supply

or 12 Volt AC/DC
Power consumption average 20 Watts
Autofill time (when closed) Every 50 hours
Warning signal (optical and acoustic) Container temperature warmer than –140 degrees

Reservoir dewar nearly empty ( 5 liters left)
Alarm signal (optical and acoustic) Reservoir dewar empty

Broken sensor(s)
External connection Connection for remote alarm
Overfill protection Mechanical overfill protection

Samples can NEVER be in contact with LN2
Outside dimensions of storage container Round 50 cm, height 64 cm +12 cm for wheels
Size of reservoir dewar with pump Round 50 cm, height 87 cm + 12 cm for wheels
Weight of storage container (empty) 22 kg.
Weight of reservoir dewar (empty) 20 kg.
Options Inventory system 6x4x64=1536 x 2ml . vials

Inventory system 6x5x64=1920 x 1.2 ml. vials

Pump with computer read-out for datalogging

November 2006