Model CA5000-N Product Information


Model CA5000  LN2: Ultra Cold Freezer Cryo Tank Temperature Monitor Alarm with Liquid CO2 Backup Injection
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Key Features:

  • More than 48 hours of -60 °C freezer backup with one 180-liter cylinder of LN2.
  • Internal maintenance-free battery with charge status indicator providing at least 48 hours of freezer backup after a power outage.
  • Digital display of interior ULT freezer chamber temperature.
  • Independent user-programmable setpoints for system alarms and LN2 injection times.
  • Visible and audible indicators for alarm conditions and system status.
  • Programmable delays to minimize unnecessary LN2 injections and nuisance alarms.
  • Relay contact output for central alarm systems and automatic notification systems.
  • Door safety interlock switch preventing LN2 injection while freezer is being accessed.
  • EU Declaration of Conformity.

Product Overview:

The CA5000-N Liquid Nitrogen Freezer Backup System is a unique combination of a field-proven ultra-reliable alarm system and a liquid nitrogen (LN2) injection system, for safeguarding your precious biological materials and other products stored at ultra-low temperatures (ULT) in mechanical freezers. The system offers user-programmable alarm and control setpoints and alarm delay times, all stored in non-volatile memory..

The customer supplied LN2 is maintained at high pressure, ready to be injected into a failing ULT freezer cabinet.  When a power outage or freezer malfunction occurs and the freezer warms above the user-defined setpoint, an alarm sounds along with a flashing red LED. If the freezer continues to warm, then a user-defined quantity of LN2 is injected into the freezer - quickly restoring the temperature below the setpoint.

In addition to providing insurance against power outages and freezer malfunctions, a manual LN2 injection from the CA5000 system will bring a mechanical freezer at room temperature to ultra-low temperatures without having to wait for the typical ULT freezer cooldown period.

NOTE: Click here for our Model CA5000-C if you need controllable C02 back-up injection for your ULT freezer.

The peace of mind and rapid cooling efficiency of our CA5000-N backup systems is crucial for vaccine and mRNA vaccine storage, virus and genetic samples, in vitro fertilization (IVF) samples, biopharmaceuticals, and other materials that must be stored at ultra-low temperatures.

Our CA5000-N systems are easy to program; including ULT freezer chamber target temperature, alarm delay periods, LN2 injection initiation conditions, and LN2 injection timing. For operational safety, the system includes a door interlock switch that disables LN2 injection when the freezer door is open. The CA5000-N is MADE IN THE USA at our Dover, NH facility.

Note: Hampshire Controls supplies the LN2 injection tubing from the CA5000 to the ULT freezer. Tubing between the LN2 supply and the CA5000-N must be provided by the user.

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