Vaccine Storage

Excessive exposure to temperatures that are too hot or cold can result in vaccines losing their potency.  Continued exposure degrades potency even further and unfortunately it cannot be restored and the vaccine must be destroyed.

The Center for Disease Control (CDC) recommends refrigerators storing vaccines MUST be kept between 2ºC and 8ºC (36ºF and 46ºF) and freezers storing vaccines between -50ºC and -15ºC (-58ºF and +5ºF) and recommends the use of a digital data logger to continuously measure temperature of vaccines in storage.  

Data loggers are essential temperature monitoring devices for fridges and freezers storing vaccines. Lascar offers a range of vaccine monitoring kits that follow both CDC and NHS guidelines and that include a digital data logger, a glycol bottle probe and calibration certificate.

USB Vs WiFi - Which One Do I Choose?


USB data loggers enjoy a long battery life (12+ months) with a user replaceable battery. Users are alerted to alarms by a flashing red LED on the device. An on-board display shows max, min and current log. Data is downloaded manually by connecting the device to the PC USB port. These loggers are the lowest cost vaccine solutions.


WiFi data loggers allow remote access to all readings via any internet-enabled device with multiple loggers viewed at any one time or by using the EasyLog Cloud App for iOS and Android. The unit can be programmed to send instant email alarm notifications and an on-board display shows max, min, current log and whether the unit is in alarm. The units can run from batteries for up to 2 years (EL-MOTE) or can be powered by mains.

Why a Glycol Bottle?

A detachable probe in a bottle filled with a thermal buffer, such as glycol, is the closest reflection of an actual vaccine. Vaccine temperatures are more stable than air temperature, as the air fluctuates when the door is opened. Suspending a probe in a sealed glycol bottle helps to prevent the change in air temperature from throwing the readings off, consequently mimicking the rate at which vaccines react to changes in temperature, giving users the most accurate readings.


All of our vaccine data loggers are provided with a calibration certificate issued at 2 and 8°C,  having been calibrated using apparatus traceable to national or international standards. This means that this logger has been purposefully tested at the temperatures you will be using it in to make sure it is accurate. 

What Do The Experts Say?

"The Green Book from Public Health England provides the latest information on vaccination procedures for health professionals and immunisation practitioners in the UK. There are strict regulations regarding the storage of vaccines, as they could become potentially dangerous and less effective if they become too hot or cold. The vaccine cold chain process refers to all parties who deal with vaccines, including vaccine manufacturers, specialist pharmaceutical distribution companies and all transportation of refrigeration and cool boxes, until the vaccine has been administered to a recipient by a trained professional.

The Centres for Disease Control and Prevention (CDC) is the leading national public health institute of the United States. The CDC guidelines confirm the regulations administered by the Green Book and our EasyLog products meet these guidelines."

Lascar Products in the Field

Don't take our word for it. Read how some of our customers have been using Lascar data loggers in the field to track vaccines, from the use of WiFi loggers to track vaccine temperatures in the UK, to the tracking of vaccine temperatures in refrigerated storage in Slovenia, to the tracking of flu vaccines throughout a chain of paediatric clinics in Pennsylvania, US.

Lascar's Top Tips

  • You should store vaccines in their original packaging, detailing expiry dates and batch numbers
  • Sufficient space just be left around the vaccine packages in the fridge to allow air to circulate 
  • Rotate your vaccine stock using a first in, first out process
  • Keep different vaccine types in specific areas of the vaccine storage fridge
  • Vaccines should not touch the back walls of the fridge, if they do they may become frozen and therefore unusable
  • Vaccines should be protected from light

Top Products


WiFi Vaccine Monitoring Kit

easylog-data-logger-EL-WiFi-DTP+-PROBE-G_certified thumb.png

Dual Channel WiFi Vaccine Monitoring Kit


21CFR WiFi Vaccine Monitoring Kit

easylog-data-logger-EL-WiFi-DTP+-PROBE-G_certified thumb.png

Dual Channel 21CFR WiFi Vaccine Monitoring Kit

easylog-data-logger-EL-USB-TP-LCD-PROBE-G-Thumb Updated.png

USB Vaccine Monitoring Kit

easylog-data-logger-EL-USB-TP-LCD-PROBE-G-Thumb Updated.png

21CFR USB Vaccine Monitoring Kit


Dual Channel GFX Vaccine Monitoring Kit

EL-SMS-2G-TP Base With Glycol Probe thumb.png

Vaccine Monitoring Kit with SMS Alerts