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1. Introduction
The term 'data logging' refers to collecting or gathering data over a period of time.

Over the next few pages, we will be looking at data logging in more detail and finding out what
it means.

Use the menu on the lefthand side to navigate through the pages.…

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2. How Data is Collected
Sensors are used to take readings or measurements at regular intervals of their environment.

The sensors could be collecting data on a wide range of thing such as temperature, humidity,
pressure, wind speed, water currents, electrical voltage, pH readings etc.

The sensors may be either…

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3. Data Logging Examples

In a Hospital

When a patient has had a major operation or is very ill, they may be in the Intensive Care Unit

While they are in the ICU, they will be constantly monitored to make sure that their condition
is stable and not deteriorating.…

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Special software (data logging software) takes the data and analyses it
The results of the analysis are presented as graphs and tables
The results are printed out

Racing Cars

Some companies invest millions into developing stateoftheart racing cars.

They want to know every aspect of how their car is performing…

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4. Remote Data Logging
Data often needs to be collected from places that are nowhere near a nice cosy office.

The data might need to be collected at all times of the day and night or during weekends
when people might be away from work.

Data might also need to…

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5. Logging Interval or Period
The 'Logging Interval' is the period of time over which measurements are taken by the

If the measured value changes very rapidly then the time interval needs to be rapid as well,
otherwise crucial events will be missed. On the other hand, if the…

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6. Advantages and Disadvantages


Data Logging can be used in remote or dangerous situations

Data logging can be carried out 24 hours a day, 365 days of the year

Time intervals for collecting data can be very frequent and regular, for example, hundreds of
measurements per second

can be…

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Equipment can be expensive for small tasks

The equipment will only take readings at the logging interval which has been set up. If
something unexpected happens between recordings, the data will not be collected.


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