Cryopreservation involves the long-term preservation of living cells and tissues by storing them at ultra-low temperatures (below -126 degrees C). Examples of such materials include genetic materials used in IVF (in-vitro fertilization) and stem cells. Prior to cryogenic storage, these materials must first be mixed with cryoprotective agents. Only then can they be brought down to ideal ultra-low storage temperatures.

Once stabilized at their required storage/preservation temperatures, internal freezer temperatures must be continuously monitored and maintained. If this is not done accurately and continuously, then the materials (typically held within dewars, called ultra-low temperature freezers) will eventually become compromised. If this happens, then these materials will no longer be viable for research and/or IVF. Fortunately, by using the most current monitoring and backup injection technology, the highest level of storage safety can be achieved - minimizing the chance of "in-storage" material loss.

Model CA5000 Freezer Monitor/Alarm with Backup LN2 Injection Cooling.
Model CA5000 Series.

For example, our CA5000 freezer monitor/alarm with C02 backup injection and our CA5000 ultra cold freezer monitor/alarm with LN2 backup injection (shown above). Both have been engineered with maximum storage safety in mind. They both offer monitoring and alarm indication for cold storage protection - but what makes them really different is that they also offer additional freezer cold storage operational protection.

Beyond real-time sensor-based monitoring/alarm capabilities, both systems include a battery backup system that functions from 24 to 48-hours AND they will inject controlled quantities of liquid CO2 or LN2 directly into your ultra low temperature freezer in the event of a power loss, coolant loss or a freezer mechanical failure.

Both models come equipped with a digital display, user-programmable settings, relay outputs and door position indication switch inputs for safe cryogen injection. They are truly the ultimate in cold storage material protection.

For dewar cryogenic cold chain freezing the Model LD 215 LN2 level detetor/alarm is designed to detect low liquid cryogen levels (e.g., impending rising temperatures due to increased evaporation) by using an RTD probe positioned above the cryogenic liquid level. The unit and probe (shown in operation below) includes audio and visual alarm indicators, an SPDT relay output, a rechargeable battery backup system and user-programmable alarm, alarm delay and alarm mute functions.


Model LD 215 Ultra Cold Nitrogen Level Detector/Temperature monitor/Alarm.
Model LD-215 LN2 Level Detector.