How to test for conductivity in freshwater
Conductivity is measured by placing a conductivity probe in the water and measuring the flow of electricity between the electrodes.
- Turn on the meter by pressing the top button.
- Dip the meter into the water collected in your sample cup. Do not dunk the whole device in, as the battery is near the top. Hold in the water for 2 minutes, swishing it around lightly. Continue until both values remain steady for 30 seconds.
- Tip: If you get a reading of 10 or less, you have not removed the cap or you have taken the sensor out of the water before reading) Read the measurements. We record in µS/cm (microsiemens per centimetre), so check the units. If you get a reading like 1.3, it converts the measure to mS (millisiemens), and you must multiply 1.3 by 1000 and record 1,300 in your form.
- Don’t forget to turn off the device after use to preserve battery life (top button).
Taking care of your conductivity meter
Since the probe is conducting an electric current, it is so important to keep the electrode clean. Rinse electrodes in distilled water often, especially if you are taking samples where readings are high or if the area is polluted.
You should calibrate your device before every season or if you suspect damage. Learn how to calibrate your meter here.