Freezer temperature monitoring and alarming in -90°C ultra-low temperature freezers

Overview - Freezer temperature monitoring

Many organizations are required to monitor and record temperatures within their -90°C ultra-low temperature freezers in order to meet quality and regulatory requirements for pharmaceuticals, biologics and human cell and tissue products (HCTPs).

Challenge

A challenge of monitoring ultra low temperature freezers is how to collect the data on a continuous basis, easily and without affecting the temperature inside.

Another challenge is how best to acquire the data on a real-time basis so that the conditions can be remotely monitored and alarmed — without having to drill holes in the freezer to place wires or probes.

Solution

Veriteq offers several alternative solutions to monitor temperature in ultra-low temperature freezers and provide freezer alarms.

If your needs are to record temperature conditions strictly for archival purposes, the easiest solution is to use a VL-1000-VLT Very Low Temperature data logger. It is a self-contained recording device that can be placed directly inside the freezer without requiring any wiring. Just place the unit and close the door.

If you need to record and monitor conditions on a continuous real-time basis, a connection point will be required solution is to mount a data logger outside the freezer and run a thin temperature probe inside. A further advantage to this system is that it is capable of monitoring both interior and exterior temperatures from a single data logger.

Our thin temperature probe is ideal for routing through door seals without causing an air gap.

Using a Veriteq VL-1000-21X Temperature data logger:

1. Open the freezer door and place the probe so that the stainless steel tip is not in direct contact with the freezer walls. It is preferable to position the probe on the door hinge side of the freezer to minimize disruption to normal freezer loading and unloading.
2. Feed the probe out through the door seal so that it can be attached to the data logger on the outside of the freezer.
3. Attach the temperature probe to the data logger and position on the side of the freezer.

For more information on freezer temperature monitoring or freezer temperature alarms, please contact us.