A data logger is an electronic instrument that records measurements from sensors at set intervals over time. It can record data for months unattended, indoors, outdoors, or underwater. A pH meter data logger measures pH by accepting the voltage from a pH electrode. It is important to use a data logger with an input range that can handle the small voltage from the pH sensor without affecting the output. Pairing the data logger with a temperature sensor allows correcting pH measurements for temperature fluctuations. Data loggers automatically collect accurate data over long periods but equipment costs and potential malfunctions are disadvantages.
3. WHAT IS IT?
• A electronic instrument that records measurements at set intervals over a period of
time
• Typically compact, battery-powered devices equipped with an internal microprocessor,
data storage, and one or more sensors.
• Can be deployed indoors, outdoors, and underwater, and can record data for up to
months at a time, unattended.
• May be a single-unit, stand-alone device with internal sensors.
4. Measuring pH with a Data Logger
• A data logger that will be used for pH measurements must be
capable of accepting positive and negative voltages.
• The pH electrode is very high produces a voltage.
• Can be used to provide an adequate signal and avoid the effects of
input loading.
• be set to take readings over a long period of time, eg hourly
temperature readings every day.
5. How to use pH meter with data logger
• Access the logger wirelessly via Bluetooth Low Energy and the InTemp app on your
mobile device
• Get current and min/max temperatures at a glance on the pH meter
• Set audible and visual alarms to notify you of an excursion.
• Download and share secure PDFs to streamline reporting and regulatory compliance.
6. Types of data logger
pH electrode
1. Handheld Multi-
Channel Data Loggers
3. Data logger use
SD memory card
Bluetooth data logger
7. Advantages of using data logger
• Ability to automatically collect data
• Can be carried out 24 hours a day
• More accurate because there is no likelihood of human error
8. Disadvantages of using data logger
• If the data logger equipment breaks down or malfunctions, some data
could be lose or not recorded
• Equipment is expensive
9. SUMMARY
• In conclusion, measurement of the pH of a solution is not as simple as it
may first appear. There are 3 important factors that need to be considered,
the small output voltage of the pH sensor, the effects of input impedance
loading of the data logger on the sensor output and the effect of
temperature on the measurement itself.
• By using an intelligent data logger with the appropriate input range that also
allows a temperature measurement and application of a correction factor
along with a preamplified sensor or separate amplifier, accurate pH
measurements can be obtained.
