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Do I need to calibrate my Clever Logger?

We get asked about calibration all the time. Here are our thoughts.

A history lesson

Not that long ago, most temperature sensors were analog, rather than digital.  These sensors had a tendency to “drift” over time – meaning they had to be regularly recalibrated to be accurate. They literally adjusted the sensors to give a more accurate reading.

What a pain.

Luckily, the electronic sensors used in modern loggers like Clever Logger do not really suffer from drift. So “calibration” is kind of a thing of the past. 

Technically we don’t “calibrate” our loggers.


Instead of calibrating, we “certify” them.  This is a test by an independent lab to see how accurate they are. This is the proof that you need to say that you can continue to trust the readings.

What if they are too far out?

Historically, if the reading was too far out then you would do the adjustment to bring it closer to the correct reading.

Now, in the very unlikely case that the reading is outside the device’s accuracy range we fail the unit and recommend that it be replaced.

Our logic is very simple:

1. There is no reason for the unit to drift significantly,

2. The unit has drifted significantly

3. The unit has obviously been damaged somehow

But "Strive for 5" says I need to calibrate it

More history.

The Strive for 5 guidelines were first written when vaccines were often kept in dodgy domestic fridges and checked with mercury thermometers.

With the advent of modern vaccine fridges and digital temperature loggers, a lot of the monitoring requirements are becoming obsolete, including the requirement to calibrate the logger once a year. It just isn’t necessary. 

BUT having an annual check once a year is great for peace of mind and proof that the unit hasn’t been damaged in the past 12 months.

Strive for Five gives users the option to calibrate annually OR as per the manufacturers’ recommendations. 

Because they use high quality digital temperature sensors, Clever Logger loggers do not need annual calibration. It’s not even possible for us to calibrate a Clever Logger. Changing the battery The logger’s battery will last longer than 12 months, but to simplify the compliance with Strive For Five we will automatically remind you after 12 months to replace the battery.

More information about batteries

What about certification?

If you require a certificate stating your devices are working as designed there are three options we can offer:
  • A Certificate of Accuracy from a testing lab – from $121 inc. GST
  • A NATA Certificate from an accredited lab – from $231 inc. GST
  • Purchase a replacement Logger through our annual renewal process with a Certificate of Compliance from the manufacturer – from $99 inc. GST
The difference in the options is that the lab in the first option is not NATA accredited but uses NATA traceable instruments. The lab in the second option is a NATA accredited lab and can provide certificates with the NATA label. A Certificate of Compliance is one we receive from the manufacturer that states that the device is within the specified error margin when it leaves the factory. Do you need it? Probably not. But if your governing organisation insists, the service is available to you. You can call us to discuss on 1300 80 88 89 or send us an email: [email protected].


You're going to love Clever Logger

To prove it, we’ll send you a Starter Kit to try out for a whole month.

Set it up, have a play, explore the features – obligation free.

If you love it, just let us know.

If not, just send it back.

What is NATA?

The National Association of Testing Authorities (NATA) is the recognised national accreditation authority for analytical laboratories and testing service providers in Australia. It is an independent, not-for-profit organisation that provides independent assurance of technical competence. 

NATA accredits organisations to perform testing and inspection activities for their products and services. This gives consumers the assurance they need to make safe, healthy and reliable choices .

Location Views

In the top right corner of the Location page, you will find the View chooser.

There are three options: Simple, Detailed and Gauge.


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